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  • Biology  (227)
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  • Iranian Fisheries Science Research Institute  (205)
  • NOAA/National Centers for Coastal Ocean Science
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  • 1
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    The Southeast Bering Sea Ecosystem: implications for marine resource management (Final Report: Southeast Bering Sea Carrying Capacity). (2021)
    NOAA/National Centers for Coastal Ocean Science | Silver Spring, MD
    In:  http://aquaticcommons.org/id/eprint/14636 | 403 | 2014-02-23 00:18:09 | 14636 | United States National Ocean Service
    Details
    Publication Date: 2021-06-30
    Description: Southeast Bering Sea Carrying Capacity (SEBSCC, 1996–2002) was a NOAA Coastal Ocean Program project that investigated the marine ecosystem of the southeastern Bering Sea. SEBSCC was co-managed by the University of Alaska Fairbanks, NOAA Alaska Fisheries Science Center, and NOAA Pacific Marine Environmental Laboratory. Project goals were to understandthe changing physical environment and its relationship to the biota of the region, to relate that understanding to natural variations in year-class strength of walleye pollock (Theragra chalcogramma), and to improve theflow of ecosystem information to fishery managers.In addition to SEBSCC, the Inner Front study (1997–2000), supported by the National Science Foundation (Prolonged Production and Trophic Transfer to Predators: Processes at the Inner Front of the S.E. Bering Sea), was active in the southeastern Bering Sea from 1997 to 1999. The SEBSCC andInner Front studies were complementary. SEBSCC focused on the middle and outer shelf. Inner Front worked the middle and inner shelf. Collaboration between investigators in the two programs was strong, and the joint results yielded a substantially increased understanding of the regional ecosystem.SEBSCC focused on four central scientific issues: (1) How does climate variability influence the marine ecosystem of the Bering Sea? (2) What determines the timing, amount, and fate of primary and secondary production? (3) How do oceanographic conditions on the shelf influence distributions of fish and other species? (4) What limits the growth of fish populations on the eastern Bering Sea shelf? Underlying these broad questions was a narrowerfocus on walleye pollock, particularly a desire to understand ecological factors that affect year-class strength and the ability to predict the potential of a year class at the earliest possible time. The Inner Front programfocused on the role of the structural front between the well-mixed waters of the coastal domain and the two-layer system of the middle domain. Of special interest was the potential for prolonged post-spring-bloom productionat the front and its role in supporting upper trophic level organisms such as juvenile pollock and seabirds. Of concern to both programs was the role of interannual and longer-term variability in marine climates and their effectson the function of sub-arctic marine ecosystems and their ability to support upper trophic level organisms.
    Keywords: Biology ; Ecology ; Fisheries ; Management
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  • 2
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    Change in Pacific Northwest coastal ecosystems. Proceedings of the Pacific Northwest Coastal Ecosystems Regional Study Workshop, August 73-14, 1996, Troutdale, Oregon (2021)
    NOAA/National Centers for Coastal Ocean Science | Silver Spring, MD
    In:  http://aquaticcommons.org/id/eprint/14650 | 403 | 2014-02-24 00:09:16 | 14650 | United States National Ocean Service
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    Publication Date: 2021-06-30
    Description: Over the past one hundred and fifty years, the landscape and ecosystems of the Pacific Northwest coastal region, already subject to many variable natural forces, have been profoundly affected by human activities. In virtually every coastal watershed from the Strait of Juan de Fuca to CapeMendocino, settlement, exploitation and development of resou?-ces have altered natural ecosystems. Vast, complex forests that once covered the region have been largely replaced by tree plantations or converted to non-forest conditions. Narrow coastal valleys, once filled withwetlands and braided streams that tempered storm runoff and provided salmon habitat, were drained, filled, or have otherwise been altered to create land for agriculture and other uses. Tideflats and saltmarshes in both large and small estuaries were filled for industrial, commercial,and other urban uses. Many estuaries, including that of the Columbia River, have been channeled, deepened, and jettied to provide for safe, reliable navigation. The prodigious rainfall in the region, once buffered by dense vegetation and complex river and stream habitat, now surges down sirfiplified stream channels laden with increased burdens of sediment and debris. Although these and many other changes have occurred incrementally over time and in widely separated areas, their sum can now be seen to have significantly affected the natural productivity of theregion and, as a consequence, changed the economic structure of its human communities. This activity has taken place in a region already shaped by many interacting and dynamic natural forces. Large-scale ocean circulation patterns, which vary over long time periods, determine the strength and location of currents along the coast, and thus affect conditions in the nearshoreocean and estuaries throughout the region. Periodic seasonal differences in the weather and ocean act on shorter time scales; winters are typically wet with storms from the southwest while summers tend to be dry with winds from the northwest. Some phenomena are episodic, such asEl Nifio events, which alter weather, marine habitats, and the distribution and survival of marine organisms. Other oceanic and atmospheric changes operate more slowly; over time scales of decades, centuries, and longer. Episodic geologic events also punctuate the region, such asvolcanic eruptions that discharge widespread blankets of ash, frequent minor earthquakes, and major subduction zone earthquakes each 300 to 500 years that release accumulated tectonic strain, dropping stretches of ocean shoreline, inundating estuaries and coastal valleys, and triggering landslides that reshape stream profiles. While these many natural processes have altered, sometimes dramatically, the Pacific Northwest coastal region, these same processes haveformed productive marine and coastal ecosystems, and many of the species in these systems have adapted to the variable environmental conditions of the region to ensure their long-term survival.
    Keywords: Biology ; Ecology ; Environment ; Fisheries
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  • 3
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    Forestry Impacts on Freshwater Habitat of Anadromous Salmonids in the Pacific Northwest and Alaska: requirements for protection and restoration (2021)
    NOAA/National Centers for Coastal Ocean Science | Silver Spring, MD
    In:  http://aquaticcommons.org/id/eprint/14654 | 403 | 2014-02-26 20:08:10 | 14654 | United States National Ocean Service
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    Publication Date: 2021-07-01
    Description: This synthesis presents a science overview of the major forest management Issues involved in the recovery of anadromous salmonids affected by timber harvest in the Pacific Northwest and Alaska. The issues involve the components of ecosystem-based watershed management and howbest to implement them, including how to: Design buffer zones to protect fish habitat while enabling economic timber production; Implement effective Best Management Practices (BMPs) to prevent nonpoint-source pollution;Develop watershed-level procedures across property boundaries to prevent cumulative impacts; Develop restoration procedures to contribute to recovery of ecosystem processes; and Enlist support of private landowners in watershed planning, protection, and restoration.Buffer zones, BMPs, cumulative impact prevention, and restoration are essential elements of what must be a comprehensive approach to habitat protection and restoration applied at the watershed level within a larger context of resource concerns in the river basin, species status under the Endangered Species Act (ESA), and regional environmental and economic issues (Fig. ES. 1).This synthesis 1) reviews salmonid habitat requirements and potential effects of logging; 2) describes the technical foundation of forest practices and restoration; 3) analyzes current federal and non-federal forest practices; and 4) recommends required elements of comprehensive watershed management for recovery of anadromous salmonids.
    Keywords: Biology ; Ecology ; Fisheries ; Management
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  • 4
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    Bering Sea FOCI Final Report (2021)
    NOAA/National Centers for Coastal Ocean Science | Silver Spring, MD
    In:  http://aquaticcommons.org/id/eprint/14647 | 403 | 2014-02-24 00:10:36 | 14647 | United States National Ocean Service
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    Publication Date: 2021-06-30
    Description: To develop an understanding of stock structure and recruitment variation in Bering Sea pollock, the Coastal Ocean Program of the National Oceanic and Atmospheric Administration (NOAA) funded an 7-year (1991-1997),interdisciplinary project named Bering Sea Fisheries-Oceanography Coordinated Investigations (BS FOCI; Schumacher and Kendall, 1995) for which NOAA and academic researchers were selected through a competitive process(Macklin, this report). The project goals, based on recommendations from an international symposium on pollock (Aron and Balsiger, 1989) were to (1) determine stock structure in the Bering Sea and its potential relationshipto physical oceanography, and (2) examine recruitment processes in the eastern Bering Sea. Both of these have direct implication to management. An integrated set of field, laboratory, and modeling studies were establishedto accomplish these goals. To address the first goal, project objectives were to establish details of oceanic circulation relevant to larval dispersal and separation of stocks, and determine if unique chemical or genetic indicators existed for different stocks. The recruitment component of BS FOCI, addressing the second goal, focused on understanding causes of variable mortality of pollock larvae in the different habitats of the eastern Bering Sea.The emphasis of recruitment studies was to determine the dominant physical oceanographic features (turbulence, temperature, and transport) that could influence survival of pollock larvae, and investigate factors controllingfood production for the larvae. A later component contrasted juvenile habitat in three hydrographic regimes around the Pribilof Islands (Brodeur, this report).
    Keywords: Biology ; Ecology ; Fisheries
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  • 5
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    Guidelines for the conservation and restoration of seagrasses in the United States and adjacent waters (2021)
    NOAA/National Centers for Coastal Ocean Science | Silver Spring, MD
    In:  http://aquaticcommons.org/id/eprint/14649 | 403 | 2014-02-24 00:09:54 | 14649 | United States National Ocean Service
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    Publication Date: 2021-06-30
    Description: Seagrass ecosystems are protected under the federal "no-net-loss" policy for wetlands and form one of the mostproductive plant communities on the planet, performing important ecological functions. Seagrass beds have been recognized as a valuable resource critical to the health and function of coastal waters. Greater awareness and public education, however, is essential for conservation of this resource. Tremendous losses of this habitat have occurred as a result of development within the coastal zone. Disturbances usually kill seagrasses rapidly, and recovery is often comparatively slow. Mitigation to compensate for destruction of existing habitat usually follows when the agent of loss and responsible party are known. Compensation assumes that ecosystems can be made to order and, in essence, trades existing functional habitatfor the promise of replacement habitat. While ~lant ingse agrass is not technically complex, there is no easy way to meet the goal of maintaining or increasing seagrass acreage. Rather, the entire process of planning, planting and monitoring requires attention to detail and does notlend itself to oversimplification.
    Keywords: Biology ; Ecology ; Fisheries
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  • 6
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    Harmful algal blooms in coastal waters: options for prevention, control and mitigation (2021)
    NOAA/National Centers for Coastal Ocean Science | Silver Spring, MD
    In:  http://aquaticcommons.org/id/eprint/14651 | 403 | 2014-02-24 00:08:40 | 14651 | United States National Ocean Service
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    Publication Date: 2021-06-30
    Description: This report is the product of a panel of experts in the science of blooms of unicellular marine algae which can cause mass mortalities in a variety of marine organisms and cause illness and even death in humans who consume contaminated seafood. These phenomena are collectively termed harmful algal blooms or HABs for short. As a counterpart to recent assessments of the priorities forscientific research to understand the causes and behavior of HABs, this assessment addressed the management options for reducing their incidence and extent (prevention), actions that can quell or contain blooms (control), and steps to reduce the losses of resources or economic values and minimize human health risks (mitigation).This assessment is limited to an appraisal of scientific understanding, but also reflects consideration of information and perspectives provided by regional experts, agency managers and user constituencies during three regional meetings. The panel convened these meetings during the latter half of 1996 to solicit information and opinions from scientific experts, agency managers and user constituencies in Texas, Washington, and Florida. The panel's assessment limited its attention to those HABs that result in neurotoxic shellfish poisoning, paralytic shellfish poisoning, brown tides, amnesic shellfish poisoning, and aquaculture fish kills. This covers most, but certainly not all, HAB problems in the U.S.
    Keywords: Biology ; Ecology ; Fisheries
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  • 7
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    Marine eutrophication review. Part 1: Quantifying the effects of nitrogen enrichment on phytoplankton in coastal ecosystems; Part 2: Bibliography with abstracts (2021)
    NOAA/National Centers for Coastal Ocean Science | Silver Spring, MD
    In:  http://aquaticcommons.org/id/eprint/14657 | 403 | 2014-02-26 20:12:26 | 14657 | United States National Ocean Service
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    Publication Date: 2021-07-01
    Description: Professionals who are responsible for coastal environmental and natural resource planning and management have a need to become conversant with new concepts designed to provide quantitative measures of the environmental benefits of natural resources. These amenities range from beaches to wetlands to clean water and other assets that normally are not bought and sold in everyday markets.At all levels of government — from federal agencies to townships and counties — decisionmakers are being asked to account for the costs and benefits of proposed actions. To non-specialists, the tools of professional economists are often poorly understood and sometimes inappropriatefor the problem at hand. This handbook is intended to bridge this gap.The most widely used organizing tool for dealing with natural and environmental resource choices is benefit-cost analysis — it offers a convenient way to carefully identify and array, quantitatively if possible, the major costs, benefits, and consequences of a proposed policy or regulation.The major strength of benefit-cost analysis is not necessarily the predicted outcome, which depends upon assumptions and techniques, but the process itself, which forces an approach to decision-making that is based largely on rigorous and quantitative reasoning.However, a major shortfall of benefit-cost analysis has been the difficulty of quantifying both benefits and costs of actions that impact environmental assets not normally, nor even regularly, bought and sold in markets. Failure to account for these assets, to omit them from the benefit-costequation, could seriously bias decisionmaking, often to the detriment of the environment. Economists and other social scientists have put a great deal of effort into addressing this shortcoming by developing techniques to quantify these non-market benefits.The major focus of this handbook is on introducing and illustrating concepts of environmental valuation, among them Travel Cost models and Contingent Valuation. These concepts, combined with advances in natural sciences that allow us to better understand how changes in the naturalenvironment influence human behavior, aim to address some of the more serious shortcomings in the application of economic analysis to natural resource and environmental management and policy analysis.Because the handbook is intended for non-economists, it addresses basic concepts of economic value such as willingness-to-pay and other tools often used in decision making such as costeffectiveness analysis, economic impact analysis, and sustainable development. A number of regionally oriented case studies are included to illustrate the practical application of these concepts and techniques.
    Keywords: Biology ; Ecology ; Environment ; Fisheries
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  • 8
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    Methodologies and mechanisms for management of cumulative coastal environmental impacts. Part I: Synthesis, with annotated bibliography; Part II: Development and application of a cumulative impacts assessment protocol (2021)
    NOAA/National Centers for Coastal Ocean Science | Silver Spring, MD
    In:  http://aquaticcommons.org/id/eprint/14655 | 403 | 2014-02-26 20:09:47 | 14655 | United States National Ocean Service
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    Publication Date: 2021-07-01
    Description: What Are ~umulat iveE ffects?Coastal managers now recognize that many of the most serious resource degradation problems have built up gradually as the combined outcome of numerous actions and choices which alone may have had relatively minor impacts. For example, alteration of essential habitat throughwetland loss, degradation of water quality from nonpoint source pollution, and changes in salinity of estuarine waters from water diversion projects can be attributed to numerous small actions and choices. These incremental losses have broad spatial and temporal dimensions,resulting in the gradual alteration of structure and functioning of biophysical systems. In the environmental management field, the term "cumulative effects" is generally used to describe this phenomenon of changes in the environment that result from numerous, small-scale alterations.
    Keywords: Biology ; Ecology ; Environment ; Fisheries ; Management
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  • 9
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    Synthesis of summer flounder habitat parameters (2021)
    NOAA/National Centers for Coastal Ocean Science | Silver Spring, MD
    In:  http://aquaticcommons.org/id/eprint/14660 | 403 | 2014-02-26 20:14:16 | 14660 | United States National Ocean Service
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    Publication Date: 2021-07-01
    Description: The summer flounder, Paralichthys dentatus, is overexploited and is currently at very low levels of abundance. This is reflected in the compressed age structure of the population and the low catches in both commercial and recreational fisheries. Declining habitat quantity and quality may be contributing to these declines, however we lack a thorough understanding of the role of habitats in the population dynamics of this species. Stock structure is unresolved and current interpretations, depending on the technique and study area, suggest that there may be two or three spawning populations. If so, these stocks may have differing habitat requirements. In response to this lack of knowledge, this document summarizes and synthesizes the available information on summer flounder habitat in all life history stages (eggs, larvae, juveniles and adults) and identifies areas where further research is needed.Several levels of investigation were conducted in order to produce this document. First, an extensive search for summer flounder habitat information was made, whichincluded both the primary and gray literature as well as unanalyzed data. Second, state and federal fisheries biologists and resource managers in all states within theprimary range of summer flounder (Massachusetts to Florida) were interviewed along with a number of fish ecologists and summer flounder experts from the academic and private sectors. Finally, information from all sources was analyzed and synthesized to form a coherent overview.This document first presents an overview of the economic importance and current status of summer flounder (Chapter 1). It then summarizes our present state of knowledge of summer flounder distribution, life history patterns and stock identification (Chapter 2). This is followed by a synopsis of habitat requirements during each life history stage. For convenience, this is presented by general habitat as offshore eggs (Chapter 3), offshore larvae (Chapter 4), estuarine larvae (Chapter 5), estuarinejuveniles (Chapter 6), offshore juveniles (Chapter 7) and estuarine and offshore adults (Chapter 8). In several instances, previously undigested data sets are analyzed toprovide more detailed information, especially for estuarine juveniles. The information is then discussed in terms of its relevance to resource managers (Chapter 9).
    Keywords: Biology ; Ecology ; Fisheries
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  • 10
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    Deepwater Horizon oil spill: assessment of potential impacts on the deep soft-bottom benthos; interim data summary report (2021)
    NOAA/National Centers for Coastal Ocean Science | Charleston, SC
    In:  http://aquaticcommons.org/id/eprint/14662 | 403 | 2014-02-21 22:08:38 | 14662 | United States National Ocean Service
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    Publication Date: 2021-07-01
    Description: A study was initiated in May 2011, under the direction of the Deepwater Horizon (DWH) Natural Resource Damage Assessment (NRDA) Deepwater Benthic Communities Technical Working Group (NRDA Deep Benthic TWG), to assess potential impacts of the DWH oil spill on sediments and resident benthic fauna in deepwater (〉 200 meters) areas of the Gulf. Key objectives of the study were to complete the analysis of samples from 65 priority stations sampled in September-October 2010 on two DWH Response cruises (Gyre and Ocean Veritas) and from 38 long-term monitoring sites (including a subset of 35 of the original 65) sampled on a follow-up NRDA cruise in May-June 2011. The present progress report provides a brief summary of results from the initial processing of samples from fall 2010 priority sites (plus three additional historical sites). Data on key macrofaunal, meiofaunal, and abiotic environmental variables are presented for each of these samples and additional maps are included to depict spatial patterns in these variables throughout the study region. The near-field zone within about 3 km of the wellhead, where many of the stations showed evidence of impaired benthic condition (e.g. low taxa richness, high nematode/harpacticoid-copepod ratios), also is an area that contained some of the highest concentrations of total petroleum hydrocarbons (TPH), total polycyclic aromatic hydrocarbons (total PAHs), and barium in sediments (as possible indicators of DWH discharges). There were similar co-occurrences at other sites outside this zone, especially to the southwest of the wellhead out to about 15 km. However, there also were exceptions to this pattern, for example at several farther-field sites in deeper-slope and canyon locations where there was low benthic species richness but no evidence of exposure to DWH discharges. Such cases are consistent with historical patterns of benthic distributions in relation to natural controlling factors such as depth, position within canyons, and availability of organic matter derived from surface-water primary production.
    Keywords: Biology ; Ecology ; Fisheries ; Pollution
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  • 11
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    Cruise report: assessment of ecological condition and stressor impacts within Great Lakes Region Areas of Concern (AOCs): Ashtabula River and Milwaukee Estuary (August 18-25, 2012) (2021)
    NOAA/National Centers for Coastal Ocean Science | Silver Spring, MD
    In:  Cynthia.Cooksey@noaa.gov | http://aquaticcommons.org/id/eprint/14669 | 403 | 2014-02-24 19:51:34 | 14669 | United States National Ocean Service
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    Publication Date: 2021-07-01
    Keywords: Biology ; Ecology ; Fisheries ; Health ; Pollution
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  • 12
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    National Centers for Coastal Ocean Science Coastal Ecosystem Assessment Program: a manual of methods (2021)
    NOAA/National Centers for Coastal Ocean Science | Oxford, MD
    In:  http://aquaticcommons.org/id/eprint/14668 | 403 | 2014-02-24 18:51:43 | 14668 | United States National Ocean Service
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    Publication Date: 2021-07-01
    Description: Environmental managers strive to preserve natural resources for future generations but have limited decision-making tools to define ecosystem health. Many programs offer relevant broad-scale, environmental policy information on regional ecosystem health. These programs provide evidence of environmental condition and change, but lack connections between local impacts and direct effects on living resources. To address this need, the National Oceanic and Atmospheric Administration/National Ocean Service (NOAA/NOS) Cooperative Oxford Laboratory (COL), in cooperation with federal, state, and academic partners, implemented an integrated biotic ecosystem assessment on a sub-watershed 14-digit Hydrologic Unit Code (HUD) scale in Chesapeake Bay. The goals of this effort were to 1) establish a suite of bioindicators that are sensitive to ecosystem change, 2) establish the effects of varying land-use patterns on water quality and the subsequent health of living resources, 3) communicate these findings to local decision-makers, and 4) evaluate the success of management decisions in these systems. To establish indicators, three sub-watersheds were chosen based on statistical analysis of land-use patterns to represent a gradient from developed to agricultural. The Magothy (developed), Corsica (agricultural), and Rhode (reference) Rivers were identified. A random stratified design was developed based on depth (2m contour) and river mile. Sampling approaches were coordinated within this structure to allow for robust system comparisons. The sampling approach was hierarchal, with metrics chosen to represent a range from community to cellular level responses across multiple organisms. This approach allowed for the identification of sub-lethal stressors, and assessment of their impact on the organism and subsequently the population. Fish, crabs, clams, oysters, benthic organisms, and bacteria were targeted, as each occupies a separate ecological niche and may respond dissimilarly to environmental stressors. Particular attention was focused on the use of pathobiology as a tool for assessing environmental condition. By integrating the biotic component with water quality, sediment indices, and land- use information, this holistic evaluation of ecosystem health will provide management entities with information needed to inform local decision-making processes and establish benchmarks for future restoration efforts.
    Keywords: Biology ; Ecology ; Education ; Fisheries
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    An assessment of chemical contaminants detected in passive water samplers deployed in the St. Thomas East End Reserves (STEER) (2021)
    NOAA/National Centers for Coastal Ocean Science | Silver Spring, MD
    In:  http://aquaticcommons.org/id/eprint/14678 | 403 | 2014-02-24 20:59:15 | 14678 | United States National Ocean Service
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    Publication Date: 2021-07-01
    Description: This report is the second in a series from a project to assess land-based sources of pollution (LBSP) and effects in the St. Thomas East End Reserves (STEER) in St. Thomas, USVI, and is the result of a collaborative effort between NOAA’s National Centers for Coastal Ocean Science, the USVI Department of Planning and Natural Resources, the University of the Virgin Islands, and The Nature Conservancy.Passive water samplers (POCIS) were deployed in the STEER in February 2012. Developed by the US Geological Survey(USGS) as a tool to detect the presence of water solublecontaminants in the environment, POCIS samplers were deployed in the STEER at five locations. In addition to the February 2012 deployment, the results from an earlier POCIS deployment in May 2010 in Turpentine Gut, a perennial freshwater stream which drains to the STEER, are also reported.A total of 26 stormwater contaminants were detected at least once during the February 2012 deployment in the STEER. Detections were high enough to estimate ambient water concentrations for nine contaminants using USGS sampling rate values. From the May 2010 deployment in Turpentine Gut, 31 stormwater contaminants were detected, and ambient water concentrations could be estimated for 17 compounds.Ambient water concentrations were estimated for a numberof contaminants including the detergent/surfactant metabolite 4-tert-octylphenol, phthalate ester plasticizers DEHP and DEP, bromoform, personal care products including menthol, indole, n,n-diethyltoluamide (DEET), along with the animal/plant sterol cholesterol, and the plant sterol beta-sitosterol. Only DEHP appeared to have exceeded a water quality guideline for the protection of aquatic organisms.
    Keywords: Chemistry ; Environment ; Pollution
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  • 14
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    An assessment of chemical contaminants, toxicity and benthic infauna in sediments from the St. Thomas East End Reserves (STEER) (2021)
    NOAA/National Centers for Coastal Ocean Science | Silver Spring, MD
    In:  http://aquaticcommons.org/id/eprint/14679 | 403 | 2014-02-24 19:16:48 | 14679 | United States National Ocean Service
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    Publication Date: 2021-07-01
    Description: This report contains a chemical and biological characterization of sediments from the St. Thomas East End Reserves (STEER) in St. Thomas, U.S. Virgin Islands (USVI). The STEER Management Plan (published in 2011) identified chemical contaminants and habitat loss as high or very high threats and called for a characterization of chemical contaminants as well as an assessment of their effects on natural resources. The baseline information contained in this report on chemical contaminants, toxicity and benthic infaunal community composition can be used to assess current conditions, as well as the efficacy of future restoration activities. In this phase of the project, 185 chemical contaminants, including a number of organic (e.g., hydrocarbons and pesticides) and inorganic (e.g., metals) compounds, were analyzed from 24 sites in the STEER. Sediments were also analyzed using a series of toxicity bioassays, including amphipod mortality, sea urchin fertilization impairment, and the cytochrome P450 Human Reporter Gene System (HRGS), along with a characterization of the benthic infaunal community. Higher levels of chemical contaminants were found in Mangrove Lagoon and Benner Bay in the western portion of the study area than in the eastern area. The concentrations of polychlorinated biphenyls (PCBs), DDT (dichlorodiphenyltrichloroethane), chlordane, zinc, copper, lead and mercury were above a NOAA sediment quality guideline at one or more sites, indicating impacts may be present in more sensitive species or life stages in the benthic environment. Copper at one site in Benner Bay, however, was above a NOAA guideline indicating that effects on benthic organisms were likely. The antifoulant boat hull ingredient tributyltin, or TBT, was found at the third highest concentration in the history of NOAA’s National Status and Trends (NS&T) Program, which monitors the Nation’s coastal and estuarine waters for chemical contaminants and bioeffects. Unfortunately, there do not appear to be any established sediment quality guidelines for TBT. Results of the bioassays indicated significant sediment toxicity in Mangrove Lagoon and Benner Bay using multiple tests. The benthic infaunal communities in Mangrove Lagoon and Benner Bay appeared severely diminished.
    Keywords: Chemistry ; Environment ; Pollution
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  • 15
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    Benthic habitats of Fish Bay, Coral Bay and the St. Thomas East End Reserve (2021)
    NOAA/National Centers for Coastal Ocean Science | Silver Spring, MD
    In:  Bryan.Costa@noaa.gov | http://aquaticcommons.org/id/eprint/14692 | 403 | 2014-02-25 19:13:29 | 14692 | United States National Ocean Service
    Details
    Publication Date: 2021-07-02
    Description: NOAA’s National Centers for Coastal Ocean Science Biogeography Branch has mapped and characterized large portions of the coral reef ecosystems inside the U.S. coastal and territorial waters, including the U.S. Caribbean. The complementary protocols used in these efforts have enabled scientists and managers to quantitatively and qualitatively compare marine ecosystems in tropical U.S. waters. The Biogeography Branch used similar protocols to generate new benthic habitat maps for Fish Bay, Coral Bay and the St. Thomas East End Reserve (STEER). While this mapping effort marks the third time thatsome of these shallow-water habitats (≤40 m) have been mapped, it is the first time that nearly 100% of the seafloor has been characterized in each of these areas. It is also the first time that high resolution imagery describing seafloor depth has been collected in each of these areas. Consequently, these datasets provide new information describing the distribution of coral reef ecosystems and serve as a spatial baseline for monitoring change in the Fish Bay, Coral Bay and the STEER.Benthic habitat maps were developed for approximately 64.3 square kilometers of seafloor in and around Fish Bay, Coral Bay and the STEER. Twenty seven percent (17.5 square kilometers) of these habitat maps describe the seafloor inside the boundaries of the STEER, the Virgin Islands National Park and the Virgin Islands Coral Reef National Monument. The remaining 73% (46.8 square kilometers) describe the seafloor outside of these MPA boundaries. These habitat maps were developed using a combination of semi-automated and manual classification methods. Habitats were interpreted from aerial photographs and LiDAR (Light Detection and Ranging) imagery. In total, 155 distinct combinations of habitat classes describing the geology and biology of the seafloor were identified from the source imagery.
    Keywords: Biology ; Ecology ; Fisheries ; Management
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    Baseline assessment of Guánica Bay, Puerto Rico in support of watershed restoration (2021)
    NOAA/National Centers for Coastal Ocean Science | Silver Spring, MD
    In:  dave.whitall@noaa.gov | http://aquaticcommons.org/id/eprint/14689 | 403 | 2014-02-24 23:14:15 | 14689 | United States National Ocean Service
    Details
    Publication Date: 2021-07-01
    Description: Guánica Bay is a major estuary on the southwest coast of Puerto Rico. Significant coral reef ecosystems are present outside the bay. These valuable habitats may be impacted by transport of sediments, nutrients and contaminants from the watershed, through the bay and into the offshore waters. The National Oceanic and Atmospheric Administration’s (NOAA) National Centers for Coastal Ocean Science (NCCOS), in consultation with local and regional experts, conducted an interdisciplinary assessment of coral reef ecosystems, contaminants, sedimentation rates and nutrient distribution patterns in and around Guánica Bay. This work was conducted using many of the same protocols as ongoing monitoring work underway elsewhere in the U.S. Caribbean and has enabled comparisons among coral reef ecosystems between this study and other locations in the region.This characterization of Guánica marine ecosystems establishes benchmark conditions that can be used for comparative documentation of future change, including possible negative outcomes due to future land use change, or improvement in environmental conditions arising from management actions.This report is organized into six chapters that represent a suite of interrelated studies. Chapter 1 provides a short introduction to the study area. Chapter 2 is focused on biogeographic assessments and benthic mapping of the study area, including new surveys of fish, marine debris and reef communities on hardbottom habitats in the study area. Chapter 3 quantifies the distribution and magnitude of a suite of contaminants (e.g., heavy metals, PAHs, PCBs, pesticides) in both surface sediments and coral tissues. Chapter 4 presents results of sedimentation measurements in and outside of the bay. Chapter 5 examines the distribution of nutrients in in the bay, offshore from the bay and in the watershed. Chapter 6 is a brief summary discussion that highlights key findings of the entire suite of studies.
    Keywords: Biology ; Ecology ; Fisheries ; Management
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    Porphyrin detection in denatured cnidarian tissue extracts (2021)
    NOAA/National Centers for Coastal Ocean Science | Charleston, SC
    In:  http://aquaticcommons.org/id/eprint/14710 | 403 | 2014-02-22 22:53:38 | 14710 | United States National Ocean Service
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    Publication Date: 2021-07-02
    Description: Porphyrin metabolic disruption from exposure to xenobiotic contaminants such as heavy metals, dioxins, and aromatic hydrocarbons can elicit overproduction of porphyrins. Measurement of porphyrin levels, when used in conjunction with other diagnostic assays, can help elucidate an organism’s physiological condition and provide evidence for exposure to certain toxicants. A sensitive microplate fluorometric assay has been optimized for detectingtotal porphyrin levels in detergent solubilized protein extracts from symbiotic, dinoflagellate containing cnidarian tissues. The denaturing buffer used in this modified assay contains a number of potentially interfering components (e.g., sodium dodecyl sulfate (SDS), dithiothreitol (DTT), protease inhibitors, and chlorophyll from the symbiotic zooxanthellae), which required examination and validation. Examination of buffer components were validated for use in this porphyrin assay; while the use of a specific spectrofluorometric filter (excitation 400 ± 15 nm; emission 600 ± 20 nm) minimized chlorophyll interference. The detection limit for this assay is 10 fmol of total porphyrin per μg of total soluble protein and linearity is maintained up to 5000 fmol. The ability to measure total porphyrins in a SDS protein extract now allows a single extract to be used in multiple assays. This is an advantage over classical methods, particularly when tissue samples are limiting, as is often the case with coral due to availability and collection permit restrictions.
    Description: NOAA Technical Memorandum CRCP 17
    Keywords: Biology ; Chemistry ; Fisheries
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    Synthesis of marine ecosystem monitoring activities for the United States Virgin Islands: 1990-2009 (2021)
    NOAA/National Centers for Coastal Ocean Science | Silver Spring, MD
    In:  simon.pittman@noaa.gov | http://aquaticcommons.org/id/eprint/14711 | 403 | 2014-02-24 20:31:33 | 14711 | United States National Ocean Service
    Details
    Publication Date: 2021-07-02
    Description: The ecological integrity of coral reef ecosystems in the U.S. Caribbean is widely considered to have deteriorated in the last three decades due to a range of threats and stressors from both human and non-human processes Rothenberger 2008, Wilkinson 2008). In response to the threats to Caribbean coral reef ecosystems and other regions around the world, the United States Government authorized the Coral Reef Conservation Act of 2000 to: (1) preserve, sustain, and restore the condition of coral reef ecosystems; (2) promote the wise management and sustainable use of coral reef ecosystems to benefit local communities and the Nation; and (3) develop sound scientificinformation on the condition of coral reef ecosystems and the threats to such ecosystems. The Act also resulted in the formation of a National Coral Reef Action Strategy and a Coral Reef Conservation Program.The Action Strategy (Goal 2 of Action Theme 1) outlined the importance of monitoring and assessing coral reef health as a mechanism toward reducing many threats to these ecosystems. Monitoring was considered of high importance in addressing impacts from climate change; disease; overfishing; destructive fishing practices; habitat destruction; invasive species; coastal development; coastal pollution; sedimentation/runoff and overuse from tourism.The strategy states that successful coral reef ecosystem conservation requires adaptive management that responds quickly to changing environmental conditions. This, in turn, depends on monitoring programs that track trends in coral reef ecosystem health and reveal patterns in their condition before irreparable harm occurs. As such, monitoring plays a vital role in guiding and supporting the establishment of complex or potentially controversial management strategies such as no-take ecological reserves, fishing gear restrictions, or habitat restoration, by documenting the impacts of gaps in existing management schemes and illustrating the effectiveness of new measures over time. Long-term monitoring is also required to determine the effectiveness of various management strategies to conserve and enhance coral reef ecosystems.
    Keywords: Biology ; Ecology ; Management
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    Saline-saturated DMSO-EDTA as a storage medium for microbial DNA analysis from coral mucus swab samples (2021)
    NOAA/National Centers for Coastal Ocean Science | Charleston, SC
    In:  http://aquaticcommons.org/id/eprint/14759 | 403 | 2014-02-26 21:18:00 | 14759 | United States National Ocean Service
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    Publication Date: 2021-07-03
    Description: The mucus surface layer of corals plays a number of integral roles in their overall health and fitness. This mucopolysaccharide coating serves as vehicle to capture food, a protective barrier against physical invasions and trauma, and serves as a medium to host a community of microorganisms distinct from the surrounding seawater. In healthy corals the associated microbial communities are known to provide antibiotics that contribute to the coral’s innate immunity and function metabolic activities such as biogeochemical cycling.Culture-dependent (Ducklow and Mitchell, 1979; Ritchie, 2006) and culture-independent methods (Rohwer, et al., 2001; Rohwer et al., 2002; Sekar et al., 2006; Hansson et al., 2009; Kellogg et al., 2009) have shown that coral mucus-associated microbial communities can change with changes in the environment and health condition of the coral. These changes may suggest that changes in the microbial associates not only reflect health status but also may assist corals in acclimating to changing environmental conditions. With the increasing availability of molecular biology tools, culture-independent methods are being used more frequently for evaluating the health of the animal host. Although culture-independent methods are able to provide more in-depth insights into the constituents of the coral surface mucus layer’s microbial community, their reliability and reproducibility rely on the initial sample collection maintaining sample integrity. In general, a sample of mucus is collected from a coral colony, either by sterile syringe or swab method (Woodley, et al., 2008), and immediately placed in a cryovial. In the case of a syringe sample, the mucus is decanted into the cryovial and the sealed tube is immediately flash-frozen in a liquid nitrogen vapor shipper (a.k.a., dry shipper). Swabs with mucus are placed in a cryovial, and the end of the swab is broken off before sealing and placing the vial in the dry shipper. The samples are then sent to a laboratory for analysis. After the initial collection and preservation of the sample, the duration of the sample voyage to a recipient laboratory is often another critical part of the sampling process, as unanticipated delays may exceed the length of time a dry shipper can remain cold, or mishandling of the shipper can cause it to exhaust prematurely. In remote areas, service by international shipping companies may be non-existent, which requires the use of an alternative preservation medium. Other methods for preserving environmental samples for microbial DNA analysis include drying on various matrices (DNA cards, swabs), or placing samples in liquid preservatives (e.g., chloroform/phenol/isoamyl alcohol, TRIzol reagent, ethanol). These methodologies eliminate the need for cold storage, however, they add expense and permitting requirements for hazardous liquid components, and the retrieval of intact microbial DNA often can be inconsistent (Dawson, et al., 1998; Rissanen et al., 2010).A method to preserve coral mucus samples without cold storage or use of hazardous solvents, while maintaining microbial DNA integrity, would be an invaluable tool for coral biologists, especially those in remote areas. Saline-saturated dimethylsulfoxide-ethylenediaminetetraacetic acid (20% DMSO-0.25M EDTA, pH 8.0), or SSDE, is a solution that has been reported to be a means of storing tissue of marine invertebrates at ambient temperatures without significant loss of nucleic acid integrity (Dawson et al., 1998, Concepcion et al., 2007). While this methodology would be a facile and inexpensive way to transport coral tissue samples, it is unclear whether the coral microbiota DNA would be adversely affected by this storage medium either by degradation of the DNA, or a bias in the DNA recovered during the extraction process created by variations in extraction efficiencies among the various community members. Tests to determine the efficacy of SSDE as an ambient temperature storage medium for coral mucus samples are presented here.
    Keywords: Chemistry ; Fisheries
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    A baseline assessment of the ecological resources of Jobos Bay, Puerto Rico (2021)
    NOAA/National Centers for Coastal Ocean Science | Silver Spring, MD
    In:  http://aquaticcommons.org/id/eprint/14763 | 403 | 2014-02-26 21:13:49 | 14763 | United States National Ocean Service
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    Publication Date: 2021-07-03
    Description: This baseline assessment of Jobos Bay and surrounding marine ecosystems consists of a two part series. The first report (Zitello et al., 2008) described the characteristics of the Bay and its watershed, including modeling work related to nutrients and sediment fluxes, based on existing data. The second portion of this assessment, presented in this document, presents the results of new field studies conducted to fill data gaps identified in previous studies, to provide a more complete characterization of Jobos Bay and the surrounding coral reef ecosystems. Specifically, the objective was to establish baseline values for the distribution of habitats, nutrients, contaminants, fi sh, and benthic communities. This baseline assessment is the first step in evaluating the effectiveness in changes in best management practices in the watershed.This baseline assessment is part of the Conservation Effects Assessment Project (CEAP), which is a multi-agency effort to quantify the environmental benefits of conservation practices used by agricultural producers participating in selected U.S. Department of Agriculture (USDA) conservation programs. Partners in the CEAP Jobos Bay Special Emphasis Watershed (SEW) included USDA’s Agricultural Research Service (ARS) and the Natural Resources Conservation Service (NRCS), National Oceanic and Atmospheric Administration (NOAA) and the Government of Puerto Rico. The project originated from an on-going collaboration between USDA and NOAA on the U.S. Coral Reef Task Force. The Jobos Bay watershed was chosen because the predominant land use is agriculture, including agricultural lands adjacent to the Jobos Bay National Estuarine Research Reserve (JBNERR or Reserve), one of NOAA’s 26 National Estuarine Research Reserves (NERR).This report is organized into six chapters that represent a suite of interrelated studies. Chapter 1 provides a short introduction to Jobos Bay, including the land use and hydrology of the watershed. Chapter 2 is focused on benthic mapping and provides the methods and results of newly created benthic maps for Jobos Bay and the surrounding coral reef ecosystem. Chapter 3 presents the results of new surveys of fish, marine debris, and reef communities of the system. Chapter 4 is focused on the distribution of chemical contaminants in sediments within the Bay and corals outside of the Bay. Chapter 5 focuses on quantifying nutrient and pesticide concentrations in the surface waters at the Reserve’s System-Wide Monitoring Program (SWMP) sites. Chapter 6 is a brief summary discussion that highlights key findings of the entire suite of studies.
    Keywords: Biology ; Ecology ; Fisheries ; Management
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    Sediment quality triad assessment in Kachemak Bay: characterization of soft bottom benthic habitats and contaminant bioeffects assessment condensed. A NOAA/NOS/NCCOS/CCMA Special Report (2021)
    NOAA/National Centers for Coastal Ocean Science | Silver Spring, MD
    In:  http://aquaticcommons.org/id/eprint/14765 | 403 | 2014-02-27 19:07:53 | 14765 | United States National Ocean Service
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    Publication Date: 2021-07-03
    Description: A baseline environmental characterization of the inner Kachemak Bay, Alaska was conducted using standardized National Status and Trends Bioeffects Program methods. Three sites near the village of Port Graham were also sampled for comparison. Concentrations of over 120 organic and metallic contaminants were analyzed. Ambient toxicity was assessed using two bioassays. A detailed benthiccommunity condition assessment was performed. Habitat parameters (e.g. depth, salinity, temperature, dissolved oxygen, sediment grain size, and organic carbon content) that influence species and contaminant distribution were also measured at each sampling site. The following is the synopsis of findings• Sediments were mostly mixed silt and sand with pockets of muddy zones. Organic compounds (PAHs, DDTs, PCBs, chlorinated pesticides) were detected throughout the bay but at relatively low concentrations. With some exceptions, metals concentrations were relatively low and probablyreflect the input of glacial runoff.• Homer Harbor had elevated concentrations of metallic and organic contaminants. Concentrations of organic contaminants measured were five to ten times higher in the harbor sites than in the open bay sites. Tributyltin was elevated in Homer Harbor relative to the other areas.• There was no evidence of residual PAHs attributable to oil spills, outside of local input in the confines of the harbor.• The benthic community is very diverse. Specific community assemblages were distributed based on depth and water clarity. Species richness and diversity was lower in the eastern end of the bay in the vicinity of the Fox River input. Abundance was also generally lower in the easternportion of the study area, and in the intertidal areas near Homer. The eastern portions of the bay are stressed by the sediment load from glacial meltwater.• Significant toxicity was virtually absent.• The benthic fauna at Port Graham contained a significant number of species not found in Kachemak Bay.• Selected metal concentrations were elevated at Port Graham relative to Kachemak Bay, probably due to local geology. Organic contaminants were elevated at a site south of the village.
    Keywords: Biology ; Ecology ; Fisheries ; Management ; Pollution
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    Cruise report: regional assessment of ecosystem condition and stressor impacts along the northwestern Gulf of Mexico Shelf. NOAA Ship 'Nancy Foster' NF-11-07-RACOW (August 8-16, 2011) (2021)
    NOAA/National Centers for Coastal Ocean Science | Charleston, SC
    In:  http://aquaticcommons.org/id/eprint/14780 | 403 | 2014-02-27 19:49:19 | 14780 | United States National Ocean Service
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    Publication Date: 2021-07-03
    Description: This cruise report is a summary of a field survey conducted along a portion of the U.S. continental shelf in northwestern Gulf of Mexico (GOM), at navigable depths along the coastline seaward to the shelf break (~100m) from about 89°30' W to 95°28' W longitude, August 8 – 16, 2011 on NOAA Ship Nancy Foster Cruise NF-11-07-RACOW. Synoptic sampling of multiple ecological indicators was conducted at each of 34 stations throughout these waters using a random probabilistic sampling design. The original study design consisted of 50 stations extending from the Mississippi delta all the way to the U.S./Mexican border, but vessel failures precluded sampling at 16 stations within the western-most portion of the study area. At each station samples were collected for the analysis of benthic community structure and composition; concentrations of chemical contaminants in sediments and target demersal biota; sediment toxicity; nutrient and chlorophyll levels in the water column; and other basic habitat characteristics such as salinity, temperature, dissolved oxygen, turbidity, pH, sediment grain size, and organic carbon content. Other indicators, from a human-dimension perspective, were also recorded, including presence of vessels, oil rigs, surface trash, visual oil sheens in sediments or water, marine mammals, or noxious/oily sediment odors.The overall purpose of the survey was to collect data to assess the status of ecosystem condition and potential stressor impacts throughout the region, based on these various indicators and corresponding management thresholds, and to provide this information as a baseline for determining how such conditions may be changing with time. While sample analysis is still ongoing, some preliminary results and observations are reported here. A final report will be completed once all data have been processed.
    Keywords: Biology ; Ecology ; Fisheries ; Management
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    Gulf of Mexico tidal creeks serve as sentinel habitats for assessing the impact of coastal development on ecosystem health (2021)
    NOAA/National Centers for Coastal Ocean Science | Charleston, SC
    In:  http://aquaticcommons.org/id/eprint/14779 | 403 | 2014-02-27 19:45:38 | 14779 | United States National Ocean Service
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    Publication Date: 2021-07-03
    Description: A study was conducted, in association with the Alabama and Mississippi National Estuarine Research Reserves (NERRs) in the Gulf of Mexico (GoM) as well as the Georgia, SouthCarolina, and North Carolina NERRs in the Southeast (SE), to evaluate the impacts of coastal development on tidal creek sentinel habitats, including potential impacts to human health and well-being. Uplands associated with Southeast and Gulf of Mexico tidal creeks, and the saltmarshes they drain, are popular locations for building homes, resorts, and recreational facilities because of the high quality of life and mild climate associated with these environments. Tidal creeks form part of the estuarine ecosystem characterized by high biological productivity, great ecological value, complex environmental gradients, and numerous interconnected processes. This research combined a watershed-level study integrating ecological, public health and human dimension attributes with watershed-level land cover data. The approach used for this researchwas based upon a comparative watershed and ecosystem approach that sampled tidal creek networks draining developed watersheds (e.g., suburban, urban, and industrial) as well as undeveloped sites (Holland et al. 2004, Sanger et al. 2008). The primary objective of this work was to define the relationships between coastal development with its concomitant land cover changes, and non-point source pollution loading and the ecological and human health and wellbeing status of tidal creek ecosystems.Nineteen tidal creek systems, located along the Southeastern United States coast from southern North Carolina to southern Georgia, and five Gulf of Mexico systems from Alabama and Mississippi were sampled during summer (June-August) 2005, 2006 (SE) and 2008 (GoM). Within each system, creeks were divided into two primary segments based upon tidal zoning: intertidal (i.e., shallow, narrow headwater sections) and subtidal (i.e., deeper and wider sections), and watersheds were delineated for each segment. In total, we report findings on 29 intertidal and 24 subtidal creeks. Indicators sampled throughout each creek included water quality (e.g., dissolved oxygen, salinity, nutrients, chlorophyll-a levels), sediment quality (e.g., characteristics, contaminant levels including emerging contaminants), pathogen and viral indicators (e.g., fecalcoliform, enterococci, F+ coliphages, F- coliphages), and abundance and tissue contamination of biological resources (e.g., macrobenthic and nektonic communities, shellfish tissue contaminants).Tidal creeks have been identified as a sentinel habitat to assess the impacts of coastal development on estuarine areas in the southeastern US. A conceptual model for tidal creeks in the southeastern US identifies that human alterations (stressors) of upland in a watershed such asincreased impervious cover will lead to changes in the physical and chemical environment such as microbial and nutrient pollution (exposures), of a receiving water body which then lead to changes in the living resources (responses). The overall objective of this study is to evaluate the applicability of the current tidal creek classification framework and conceptual model linkingtidal creek ecological condition to potential impacts of development and urban growth on ecosystem value and function in the Gulf of Mexico US in collaboration with Gulf of Mexico NERR sites. The conceptual model was validated for the Gulf of Mexico US tidal creeks. Thetidal creek classification system developed for the southeastern US could be applied to the Gulf of Mexico tidal creeks; however, some differences were found that warrant further examination. In particular, pollutants appeared to translate further downstream in the Gulf of Mexico US compared to the southeastern US. These differences are likely the result of the morphologicaland oceanographic differences between the two regions. Tidal creeks appear to serve as sentinel habitats to provide an early warning of the ensuing harm to the larger ecosystem in both the Southeastern and Gulf of Mexico US tidal creeks.
    Keywords: Biology ; Ecology ; Fisheries ; Management ; Pollution
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    An ecological characterization of the marine resources of Vieques, Puerto Rico Part II: Field studies of habitats, nutrients, contaminants, fish, and benthic communities (2021)
    NOAA/National Centers for Coastal Ocean Science | Silver Spring, MD
    In:  http://aquaticcommons.org/id/eprint/14806 | 403 | 2014-02-27 20:18:43 | 14806 | United States National Ocean Service
    Details
    Publication Date: 2021-06-25
    Description: Since the 1940s, portions of the Island of Vieques, Puerto Rico have been used by the United States Navy (USN) as an ammunition support detachment and bombing and maneuver training range. In April 2001, the USN began phasing out military activities on the island and transferring military property to the U.S. Department of the Interior, the Municipality of Vieques, and the Puerto Rico Conservation Trust. A small number of studies have been commissioned by the USN in the past few decades to assess selected components of the coral reef ecosystem surrounding the island; however, these studies were generally of limited geographic scope and short duration. The National Oceanic and Atmospheric Administration’s (NOAA) National Centers for Coastal Ocean Science (NCCOS), in consultation with NOAA’s Office of Response and Restoration (OR&R) and other local and regional experts, conducted a more comprehensive characterization of coral reef ecosystems, contaminants, and nutrient distribution patterns around Vieques. This work was conducted using many of the same protocols as ongoing monitoring work underway elsewhere in the U.S. Caribbean and has enabled comparisons among coral reef ecosystems in Vieques and other locations in the region.This characterization of Vieques’ marine ecosystems consists of a two part series. First, available information on reefs, fish, birds, seagrasses, turtles, mangroves, climate, geology, currents, and human uses from previous studies was gathered and integrated into a single document comprising Part I of this two part series (Bauer et al. 2008). For Part II of the series, presented in this document, new field studies were conducted to fill data gaps identified in previous studies, to provide an island-wide characterization, and to establish baseline values for the distribution of habitats, nutrients, contaminants, fish, and benthic communities. An important objective underlying this suite of studies was to quantify any differences in the marine areas adjacent to the former and current land-use zoning around Vieques. Specifically of interest was the possibility that either Naval (e.g., practice bombing, munitions storage) or civilian activities (e.g., sewage pollutants, overfishing) could have a negative impact on adjacent marine resources. Measuring conditions at this time and so recently after the land transfer was essential because present conditions are likely to be reflective of past land-use practices. In addition, the assessment will establish benchmark conditions that can be influenced by the potentially dramatic future changes in land-use practices as Vieques considers its development.This report is organized into seven chapters that represent a suite of interrelated studies. Chapter 1 provides a short introduction to the island setting, the former and current land-use zoning, and how the land zoning was used to spatially stratify much of the sampling. Chapter 2 is focused on benthic mapping and provides the methods, accuracy assessment, and results of newly created benthic maps for Vieques. Chapter 3 presents the results of new surveys of fish, marine debris, and reef communities on hardbottom habitats around the island. Chapter 4 presents results of flora and fauna surveys in selected bays and lagoons. Chapter 5 examines the distribution of nutrients in lagoons, inshore, and offshore waters around the island. Chapter 6 is focused on the distribution of chemical contaminants in sediments and corals. Chapter 7 is a brief summary discussion that highlights key findings of the entire suite of studies.
    Keywords: Biology ; Ecology ; Fisheries ; Management ; Pollution
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    Coral reef ecosystems of Reserva Natural de La Parguera (Puerto Rico): spatial and temporal patterns in fish and benthic communities (2001-2007) (2021)
    NOAA/National Centers for Coastal Ocean Science | Silver Spring, MD
    In:  http://aquaticcommons.org/id/eprint/14825 | 403 | 2014-02-28 20:16:19 | 14825 | United States National Ocean Service
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    Publication Date: 2021-06-25
    Description: Since 1999, NOAA’s Center for Coastal Monitoring and Assessment, Biogeography Branch (CCMA-BB) has been working with federal and territorial partners to characterize monitor and assess the status of the marine environment in southwestern Puerto Rico. This effort is part of the broader NOAA Coral Reef Conservation Program’s (CRCP) National Coral Reef Ecosystem Monitoring Program (NCREMP). With support from CRCP’s NCREMP, CCMA conducts the “Caribbean Coral Reef Ecosystem Monitoring project” (CREM) with goals to: (1) spatially characterize and monitor the distribution, abundance and size of marine fauna associated with shallow water coral reef seascapes (mosaics of coral reefs, seagrasses, sand and mangroves); (2) relate this information to in situ fine-scale habitat data and the spatial distribution and diversity of habitat types using benthic habitat maps; (3) use this information to establish the knowledge base necessary for enacting management decisions in a spatial setting; (4) establish the efficacy of those management decisions; and (5) develop data collection and data management protocols. The monitoring effort of the La Parguera region in southwestern Puerto Rico was conducted through partnerships with the University of Puerto Rico (UPR) and the Puerto Rico Department of Natural and Environmental Resources (DNER). Project funding was primarily provided by NOAA CRCP and CCMA.In recent decades, scientific and non-scientific observations have indicated that the structure and function of the coral reef ecosystem in the La Parguera region have been adversely impacted by a wide range of environmental stressors. The major stressors have included the mass Diadema die off in the early 1980s, a suite of hurricanes, overfishing, mass mortality of Acropora corals due to disease and several coral bleaching events, with the most severe mass bleaching episode in 2005. The area is also an important recreational resource supporting boating, snorkeling, diving and other water based activities. With so many potential threats to the marine ecosystem several activities are underway or have been implemented to manage the marine resources. These efforts have been supported by the CREM project by identifying marine fauna and their spatial distributions and temporal dynamics. This provides ecologically meaningful data to assess ecosystem condition, support decision making in spatial planning (including the evaluation of efficacy of current management strategies) and determine future information needs. The ultimate goal of the work is to better understand the coral reef ecosystems and to provide information toward protecting and enhancing coral reef ecosystems for the benefit of the system itself and to sustain the many goods and services that it offers society. This Technical Memorandum contains analysis of the first seven years of fish survey data (2001-2007) and associated characterization of the benthos. The primary objectives were to quantify changes in fish species and assemblage diversity, abundance, biomass and size structure and to provide spatially explicit information on the distribution of key species or groups of species and to compare community structure across the seascape including fringing mangroves, inner, middle, and outer reef areas, and open ocean shelf bank areas.
    Description: Cooperative investigation between NOAA and the University of Puerto Rico
    Keywords: Biology ; Ecology ; Fisheries ; Management
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    St. John, USVI mission report: a strategy to inventory, characterize, and monitor the marine region within and around the National Park and Monument boundaries of St. John, USVI (2021)
    NOAA/National Centers for Coastal Ocean Science | Silver Spring, MD
    In:  http://aquaticcommons.org/id/eprint/14846 | 403 | 2014-03-04 21:59:09 | 14846 | United States National Ocean Service
    Details
    Publication Date: 2021-06-26
    Description: The intent of this field mission was to continue ongoing efforts: (1) to spatially characterize and monitor the distribution, abundance and size of both reef fishes and conch within and around the waters of the Virgin Islands National Park (VIIS) and newly established Virgin Islands Coral Reef National Monument (VICR), (2) to correlate this information to in-situ data collected on associated habitat parameters, (3) to use this information to establish the knowledge base necessary for enacting management decisions in a spatial setting and to establish the efficacy of those management decisions. This work is supported by the National Park Service and NOAA’s Coral Reef Conservation Program’s Caribbean Coral Reef Ecosystem Monitoring Project.
    Keywords: Biology ; Ecology ; Environment ; Fisheries ; Management
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    Chemical contaminants in the coral Porites astreoides from southwest Puerto Rico (2021)
    NOAA/National Centers for Coastal Ocean Science | Silver Spring, MD
    In:  http://aquaticcommons.org/id/eprint/14868 | 403 | 2014-03-06 18:57:33 | 14868 | United States National Ocean Service
    Details
    Publication Date: 2021-06-27
    Description: This report presents an initial characterization of chemical contamination in coral tissues (Porites astreoides) from southwest Puerto Rico. It is the second technical report from a project to characterize chemical contaminants and assess linkages between contamination and coral condition. The first report quantified chemical contaminants in sediments from southwest Puerto Rico. This document summarizes the analysis of nearly 150 chemical contaminants in coral tissues. Although only eight coral samples were collected, some observations can be made on the correlations between observed tissue and sediment contaminant concentrations. The concentrations of polycyclic aromatic hydrocarbons (PAHs), typically associated with petroleum spills and the combustion of fossil fuels, and polychlorinated biphenyls (PCBs) in the coral tissues were comparable to concentrations found in adjacent sediments. However, the concentration of a chemical contaminant (e.g., PAHs) in the coral tissues at a particular site was not a good predictor of what was in the adjacent sediments. In addition, the types of PAHs found in the coral tissues were somewhat different (higher ratios of alkylated PAHs) than in sediments. The levels of PCBs and DDT in coral tissues appeared higher just outside of Guanica Bay, and there was evidence of a downstream concentration gradient for these two contaminant classes. The trace elements copper, zinc and nickel were frequently detected in coral tissues, and the concentration in the corals was usually comparable to that found in adjacent sediments. Chromium was an exception in that it was not detected in any of the coral tissues analyzed. Additional work is needed to assess how spatial patterns in chemical contamination affect coral condition, abundance and distribution.
    Description: National Status and Trends Program for Marine Environmental Quality
    Keywords: Chemistry ; Management ; Pollution
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    Coral health and disease in the Pacific: vision for action (2021)
    NOAA/National Centers for Coastal Ocean Science | Silver Spring, MD
    In:  http://aquaticcommons.org/id/eprint/14871 | 403 | 2014-03-06 18:32:20 | 14871 | United States National Ocean Service
    Details
    Publication Date: 2021-06-27
    Description: Shallow coral reefs in the IndoPacific contain the highest diversity of marine organisms in the world, with approximately 1500 described species of fish, over 500 species of scleractinian corals, and an estimated 1-10 million organisms yet to be characterized (Reaka-Kudla et al. 1994). These centers of marine biodiversity are facing significant, multiple threats to reef community and habitat structure and function, resulting in local to wide-scale regional damage. Wilkinson (2004) characterized the major pressures as including (1) global climate change, (2) diseases, plagues and invasive species, (3) direct human pressures, (4) poor governance and lack of political will, and (5) international action or inaction. Signs that the natural plasticity of reef ecosystems has been exceeded in many areas from the effects of environmental (e.g., global climate change) and anthropogenic (e.g., land use, pollution) stressors is evidenced by the loss of 20% of the world’s coral reefs (Wilkinson 2004). Predictions are that another 24% (Wilkinson 2006) are under imminent risk of collapse and an additional 26% are under a longer term threat from reduced fitness, disease outbreaks, and increased mortality. These predictions indicate that the current list of approximately 30-40 fatal diseases impacting corals will expand as will the frequency and extent of “coral bleaching” (Waddell 2005; Wilkinson 2004). Disease and corallivore outbreaks, in combination with multiple, concomitant human disturbances are compromising corals and coral reef communities to the point where their ability to rebound from natural disturbances is being lost.
    Description: NOAA Technical Memorandum Coral Reef Conservation Program 7
    Keywords: Biology ; Ecology ; Management ; Pollution
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    Using wildlife activity and antibiotic resistance analysis to model bacterial water quality in coastal ponds (2021)
    NOAA/National Centers for Coastal Ocean Science | Charleston, SC
    In:  http://aquaticcommons.org/id/eprint/14864 | 403 | 2014-03-06 18:36:18 | 14864 | United States National Ocean Service
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    Publication Date: 2021-06-27
    Description: Models that help predict fecal coliform bacteria (FCB) levels in environmental waters can be important tools for resource managers. In this study, we used animal activity along with antibiotic resistance analysis (ARA), land cover, and other variables to build models that predict bacteria levels in coastal ponds that discharge into an estuary. Photographic wildlife monitoring was used to estimate terrestrial and aquatic wildlife activity prior to sampling. Increased duck activity was an important predictor of increased FCB in coastal ponds. Terrestrial animals like deer and raccoon, although abundant, were not significant in our model. Various land cover types, rainfall, tide, solar irradiation, air temperature, and season parameters, in combination with duck activity, were significant predictors of increased FCB. It appears that tidal ponds allow for settling of bacteria under most conditions. We propose that these models can be used to test different development styles and wildlife management techniques to reduce bacterial loading into downstream shellfish harvesting and contact recreation areas.
    Keywords: Chemistry ; Ecology ; Management ; Pollution
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    St. John, USVI mission report, NOAA/NOS/NCCOS/CCMA/Biogeography Branch, July 6 - July 17, 2009 (2021)
    NOAA/National Centers for Coastal Ocean Science | Silver Spring, MD
    In:  http://aquaticcommons.org/id/eprint/14879 | 403 | 2014-03-07 19:58:25 | 14879 | United States National Ocean Service
    Details
    Publication Date: 2021-06-27
    Description: The intent of this field mission was to continue ongoing efforts: (1) to spatially characterize and monitor the distribution, abundance and size of reef fishes, and the abundance of macroinvertebrates (conch, Diatema, lobster) within and around the waters of the Virgin Islands National Park (VIIS) and newly established Virgin Islands Coral Reef National Monument (VICR), (2) to correlate this information to in-situ data collected on associated habitat parameters, (3) to use this information to establish the knowledge base necessary for enacting management decisions in a spatial setting and (4) to establish the efficacy of those management decisions.An additional focus this year, was to evaluate a new habitat data collection method for RHA sites (MSR and some Coral Bay sites). There are concerns that the cylinder habitat data are not reflective of the fish transect habitat. To address this, we collected habitat data at 5x4 m increments along the transect in addition to data collected using the cylinder method. We are currently assessing the potential differences between these methods and preliminary results indicate that the average difference of coral cover estimates between the two methods was 4.1% (range 0-11%) based on 16 sample sites.In addition, Erinn Muller, a Nancy Foster Fellowship recipient, collaborated with the Biogeography Branch to examine the spatial distribution of coral diseases, to provide baseline information on disease prevalence over varying spatial scales and to establish spatial distributions of coral diseases around St. John.
    Keywords: Biology ; Ecology ; Fisheries ; Management
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    Biogeographic characterization of fish communities and associated benthic habitats within the Flower Garden Banks National Marine Sanctuary: sampling design and implementation of scuba surveys on the coral caps (2021)
    NOAA/National Centers for Coastal Ocean Science | Silver Spring, MD
    In:  chris.caldow@noaa.gov | http://aquaticcommons.org/id/eprint/14872 | 403 | 2014-03-06 20:41:03 | 14872 | United States National Ocean Service
    Details
    Publication Date: 2021-06-27
    Description: The Flower Garden Banks National Marine Sanctuary (FGBNMS) is located in the northwestern Gulf of Mexico approximately 180 km south of Galveston, Texas. The sanctuary’s distance from shore combined with its depth (the coral caps reach to within approximately 17 m of the surface) result in limited exposure of this coral reef ecosystem to natural and human-induced impacts compared to other coral reefs of the western Atlantic. In spite of this, the sanctuary still confronts serious impacts including hurricanes events, recent outbreaks of coral disease, an increase in the frequency of coral bleaching and the massive Diadema antillarum die-off during the mid-1980s. Anthropogenic impacts include large vessel anchoring, commercial and recreational fishing, recreational scuba diving, and oil and gas related activities. The FGBNMS was designated in 1992 to help protect against some of these impacts.Basic monitoring and research efforts have been conducted on the banks since the 1970s. Early on, these efforts focused primarily on describing the benthic communities (corals, sponges) and providing qualitative characterizations of the fish community. Subsequently, more quantitative work has been conducted; however, it has been limited in spatial scope. To complement these efforts, the current study addresses the following two goals put forth by sanctuary management: 1) to develop a sampling design for monitoring benthic fish communities across the coral caps; and 2) to obtain a spatial and quantitative characterization of those communities and their associated habitats.
    Keywords: Biology ; Ecology ; Fisheries ; Management
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    Synthesis of education programs, scholarship, loan, and internship opportunities available to assist in increasing the numbers of minorities working in fisheries and marine sciences (2021)
    NOAA/National Centers for Coastal Ocean Science | Silver Spring, MD
    In:  http://aquaticcommons.org/id/eprint/14945 | 403 | 2014-03-14 23:34:50 | 14945 | United States National Ocean Service
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    Publication Date: 2021-06-29
    Description: This report is divided into six sections, the first of which provides information on documents that emphasize the need for education/training of minorities in the sciences including marine science. Also provided is material students can use to find out about careers in the sciences, some universities that offer marine science education, and curricula that should be considered. The second section deals with existing programs designed to train pre-college students and prepare them either for further education or potential employment in the sciences. The next four sections deal with existing programs in the marine sciences for college-level students, scholarships and scholarship programs, examples of loan programs, and internships and internship programs.
    Keywords: Biology ; Ecology ; Education ; Fisheries
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    Histological techniques for marine bivalve mollusks and crustaceans, 2nd edition (2021)
    NOAA/National Centers for Coastal Ocean Science | Oxford, MD
    In:  http://aquaticcommons.org/id/eprint/14949 | 403 | 2014-03-14 22:55:57 | 14949 | United States National Ocean Service
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    Publication Date: 2021-06-29
    Description: Investigators at the Cooperative Oxford Laboratory (COL) diagnose and study crustaceans, mollusks, finfish, and a variety of other marine and estuarine invertebrates to assess animal health. This edition updates the Histological Techniques for Marine Bivalve Mollusks manual by Howard and Smith (1983) with additional chapters on molluscan and crustacean techniques. The new edition is intended to serve as a guide for histological processing of shellfish, principally bivalve mollusks and crustaceans. Basically, the techniques included are applicable for histopathological preparation of all marine animals, recognizing however that initial necropsy is unique to each species. Photographs and illustrations are provided for instruction on necropsy of different species to simplify the processing of tissues. Several of the procedures described are adaptations developed by the COL staff. They represent techniques based on principles establishedfor the histopathologic study of mammalian and other vertebrate tissues, but modified for marine and aquatic invertebrates. Although the manual attempts to provide adequate information on techniques, it is also intended to serve as a useful reference source to those interested in the pathology of marine animals. General references and recommended reading listed in the back of the manual will provide histological information on species not addressed in the text.
    Description: This edition updates the Histological Techniques for Marine Bivalve Mollusks manual by Howard and Smith (1983) with additional chapters on molluscan and crustacean techniques.
    Keywords: Chemistry ; Fisheries
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    Histological techniques for marine bivalve molluscs: update (2021)
    NOAA/National Centers for Coastal Ocean Science | Silver Spring, MD
    In:  http://aquaticcommons.org/id/eprint/14947 | 403 | 2014-03-14 23:06:34 | 14947 | United States National Ocean Service
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    Publication Date: 2021-06-29
    Description: This chapter describes the procedures for determining the reproductive stage of oysters, mytilid mussels, and dreissenid mussels collected for NOAA’s National Status and Trends Mussel Watch Project. Analyses are conducted on paraffin-embedded tissues sectioned at a 5-μm thickness and stained using a pentachrome staining procedure. Each slide is examined microscopically to determine the animal’s sex and stage of gonadal development. A semi-quantitative ranking is assigned.
    Keywords: Chemistry ; Fisheries ; Pollution
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    Chrysiptera unimaculata Cuvier, 1830 (2021)
    Iranian Fisheries Science Research Institute
    In:  http://aquaticcommons.org/id/eprint/21041 | 17408 | 2017-04-27 05:58:40 | 21041 | Islamic Azad University, Science and Research Branch, Tehran
    Details
    Publication Date: 2021-07-13
    Description: Chrysiptera unimaculata, an algivorous species also living on the coral reef flat and being territorial but not considered as a strict farmer in this location. Maximum length is 8 cm in Persian Gulf. It is living in close association with macrophytes. Adults are found solitarily or in small groups among coastal algal reefs, rubble or over open beach-rock of reef flats exposed to moderate surge and feeds mainly on benthic algae. C. unimaculata is oviparous, distinct pairing during breeding. Eggs are demersal and adhere to the substrate. Males guard and aerate the eggs.
    Keywords: Biology ; Fisheries ; Chrysiptera unimaculata
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    Torpedo sinuspersici  Olfers, 1831 (2021)
    Iranian Fisheries Science Research Institute | Iran
    In:  http://aquaticcommons.org/id/eprint/21038 | 17408 | 2017-05-09 10:38:24 | 21038 | Islamic Azad University, Science and Research Branch, Tehran
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    Publication Date: 2021-07-13
    Description: Electric rays, thought to be the most primitive of the skates and rays, have stout tails but have rather expansive disc. This group is distinguished by the presence of powerful electric organs, derived from branchial muscles in head region. Torpedo sinuspersici found inshore in sandy bottoms, and well offshore from the surf zone down to 200 m. Also on or near coral reefs (like Kish Island in Persian Gulf). Common in shallow sandy areas. Occasionally hooked by anglers, more often seen by divers; can deliver a strong shock. Flesh is edible. T. sinuspersici can survive for hours after being stranded on the beach. Little is known of the life history of the Gulf torpedo. It is a sluggish predator of bony fishes. At night it actively hunts for food, sculling slowly through the water about a meter above the bottom; during the day it usually rests on the bottom and opportunistically ambushes unwary prey. It uses its broad pectoral fins to envelop the target fish before delivering an electric shock to stun it. Usually solitary, they may form groups during the mating season. Reproduction is a placental viviparous, with the developing embryos initially surviving on their yolk sacs, and then on enriched uterine fluid produced by the mother. Litters of 9-22 young are birthed in the summer. Newborns measure about 10 cm wide; males mature at a disc width of 39 cm and females at 45 cm.
    Keywords: Biology ; Fisheries ; Torpedo sinuspersici
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    Boloceroides spp. (2021)
    Iranian Fisheries Science Research Institute
    In:  http://aquaticcommons.org/id/eprint/21044 | 17408 | 2017-04-27 06:00:37 | 21044 | Islamic Azad University, Science and Research Branch, Tehran
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    Publication Date: 2021-07-13
    Description: Boloceroides spp. are looking like an untidy mop, this anemone is sometimes seen in sea grass areas on many of our shores. It is possibly seasonal. Sometimes, large numbers are seen (up to 10-20 animals in a trip) and then none at all.  Tiny swimming anemones may sometimes be confused with Sea grass anemones which have translucent tentacles with tiny spots. The swimming anemone harbors symbiotic single-celled algae (zooxanthellae). The algae undergo photosynthesis to produce food from sunlight. The food produced is shared with the sea anemone, which in return provides the algae with shelter and minerals. The oral disk and tentacle muscles are used to obtain, retain, and ingest prey; in Boloceroides spp. tentacles can autotomize if it is needed to evade a predator. Tentacles can control body form by use of their endodermal muscles. Retractors are longitudinal muscles that will aid in withdrawing tentacles and the oral disk if they are exposed to the open air.  This hypothesis is furthered because in comparison to other sea anemones, Boloceroides is loosely attached to its respective substrate, thus allowing the pedal disk to detach quickly resulting in a rapid swimming response. Boloceroides can reproduce both sexually and asexually. As Anthozoans, Boloceroides produce sexually by bypassing the medusa life cycle stage; this allows Boloceroides (and all Anthozoans) to release their egg and sperm creating planula a bilaterally symmetrical, flattened, ciliated, motile larva.
    Keywords: Biology ; Fisheries ; Boloceroides
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    Koumansetta hectori  Smith, 1957 (2021)
    Iranian Fisheries Science Research Institute
    In:  http://aquaticcommons.org/id/eprint/21042 | 17408 | 2017-04-27 03:56:54 | 21042 | Islamic Azad University, Science and Research Branch, Tehran
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    Publication Date: 2021-07-13
    Description: Many aquarists know this fish as Ambylgobius hectori but accepted name is actually Koumansetta hectori. K. hectori, Hector's goby, is a species of goby native to the Indian Ocean (including the Red Sea), first record from Persian Gulf (Kish Island, Iran) to the islands of Micronesia in the western Pacific Ocean. It can be found on sheltered coral reefs at depths of from 3 to 30 meters (though usually between 5 to 20 meters). This species reaches a length of 8.5 centimeters (3.3 in) SL. This attractive little fish measures only 2” at maturity and spends its time hovering over rocks and substrates out in the open water column. Known for their bold yellow stripes, peaceful disposition, the diminutive Hector’s Goby is a nano reef favorite. It can also be found in the aquarium trade.
    Keywords: Biology ; Fisheries ; Koumansetta hectori
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    Pempheris vanicolensis (Cuvier, 1831) (2021)
    Iranian Fisheries Science Research Institute
    In:  http://aquaticcommons.org/id/eprint/21051 | 17408 | 2017-04-27 03:54:11 | 21051 | Islamic Azad University, Science and Research Branch, Tehran
    Details
    Publication Date: 2021-07-13
    Description: Pempheris vanicolensis has reported for the first time from Persian Gulf (Kish Island). Various aspects of the biology of P. vanicolensis Cuvier & Valenciennes, a recent Lessepsian (Suez Canal) immigrant into the Mediterranean, are given. Red Sea and Mediterranean populations were compared, and the results indicate that the spawning season is shortened in the Mediterranean, continuing from April to September, as opposed to year-round in the Red Sea. Descriptions of a ripe ovary and post-larva from the Mediterranean are given. Individuals reach a mean size of 10.8 cm in their first year, and 14.4 cm in the second year. Little change has occurred in the diet of the immigrant population, and both populations feed nocturnally, chiefly on larval and adult stages of planktonic crustaceans. Direct underwater observations on the diurnal behavior of the species show that the fish leave their daytime cave shelter at sunset, congregate at a nearby site and then migrate inshore and disperse into small groups to feed. Before dawn, they reassemble at the cave's entrance, and finally enter it at sunrise, after the school has built up. Observations on Persian Gulf sweepers show that the fish are segregated into size groups, ranging 15–18 cm adults at depths of 3 m.
    Keywords: Biology ; Fisheries ; Pempheris vanicolensis
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    Population genetic structure of silver pomfret, Pampus argenteus, in Persian Gulf and Oman Sea in Iran and Kuwait waters by using10 Microsatellite Markers (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25257 | 18721 | 2018-09-07 06:57:02 | 25257 | Iranian Fisheries Science Research Institute
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    Publication Date: 2021-07-16
    Description: The silver pomfret, Pampus argenteus, is distributed in Indo-western pacific ocean, especially in Persian Gulf and Oman sea, and although is widely commercially exploited, the genetics structure of this species is not clear completely. In the present study, the genetic diversity and population structure of Pampus argentus in the Persian Gulf and Oman Sea were investigated using microsatellite DNA markers. Genomic DNA from 125 specimens was extracted and PCR amplification performed. Seven loci with reasonable polymorphism were amplified. The results showed that average of observed heterozygosity was ranged from 0.54 while expected heterozygosity was 0.67. After applying the Hardy-Weinberg Equilibrium (HWE) test, some loci were found to be significantly deviated from HWE in some populations in which deficiency of heterozygotes was apparent. Population differentiation observed among all populations (P〈0.01). The population differentiation (Fst) value between Kuwait and bushehr was the highest and significant (0.087) and between Chabahar and Bushehr (0.021) was the lowest and significant. Genetic distance analysis showed that the largest distance (0.269) was between Khuzestan and Chabahar and the smallest distance (0.075) was between Bushehr and Chabahar. The reported results could be of interest for management and conservation programmes of this species in the Persian Gulf and Oman Sea.
    Keywords: Biology ; Iran ; Persian Gulf ; Oman Sea ; Kuwait waters ; Bushehr Province ; Khuzestan province ; Chabahar ; Population ; Genetic ; Structure ; Silver pomfret ; Pampus argenteus ; Microsatellite markers ; Species ; Diversity ; DNA ; PCR ; Heterozygosity ; Equilibrium
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    An investigation of some biological aspects of three species: tiger toothed croaker, Otolithes ruber, Javelin grunter, Pomadasys kaakan and black pomfret, Parastromateus niger in the Oman Sea for optimizing fishing season (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25105 | 18721 | 2018-08-23 05:49:02 | 25105 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: During the years 1382-83, some biological aspects of three species Tiger-toothed Croaker, Otolithes ruber, Javelin grunter, Pomadasys kaakan, Black Pomfret, Parastromateus niger, have been investigated in the Oman Sea along Sistan-O-Baluchistan province. Based on the frequency of developed maturity stages (IV, V), a prologed spawning activity extending from August to March was determined for O.ruber, and the Gonadosomatic Index (GSI) suggests two peaks:the minor one in October and the major one in March-April. Comparison of Hepatosomatic Index (HI) and Condition factor (Kn) with the peak spawning indicated a reverse relationship. According to length at first maturity (Lm50%= 40cm) and exploitation of fish at length 42cm above, the stretched optimum mesh size of nets was calculated to be 100mm. On analysis of stomach food item, fish group dominated (80%), which of them Anchovy accounted for 40% of the total frequency. Comparison of mean length between the years 1374-75 and 1382-83 showed 4cm in decrees. Population dynamics parameters were determined through length based modals and the exploitation rate was estimated to be E=0.6, suggesting high level exploitation. The usal streched mesh size of nets(constructed from multifilament webbing) for capturing O.ruber were less than the proposed optimum mesh size of nets, indicating 78% of the total landings were smaller than Lm50%. Total landings in 1381 have increased up to 15% when compared to those of the year 1376. Despite the decrease of total efforts (Panel.day) by 37%, the mean value CPUE has increased up to 82%. Regarding Pomadasys kaakan species, a year-round spawning activity has been observed, with two peaks: A major one in April and an aminor one in September. As those of O.ruber species, there was an inverse relationship between HI and Kn with the peak spawning activity. Based on the length at first maturity (Lm50% = 44cm) and capturing fish of the length at 46cm and above, the stretched optimum mesh size of nets was calculated to be 149.6mm. According to analysis of stomach contents, fish group accounted for 35% of the groups studied, which of them , Largehead hairtail, Trichiurus lepturus linnaeus, constituted 52% of the total frequency. In addition to estimation of population dynamics, the exploitation rate was estimated to be E= 0.49. Majority of the species catch was made by mesh size of nets used for O.ruber of which 133mm mesh size accounted for the level (30%). Information on length distribution showed that 60% of the total fish landed was below Lm50%. Total landings in 1381 decreased to 10% in comparison to 1376.Total fishing efforts and CPUE also decreased to 33% and 24% respectively. For parastromateus Niger, There was a long period spawning activity from March to December, with two peaks: A major one in August and a minor one in March. According to Lm50% (39cm) and catching of fish 39cm above, the stretched optimum mesh size of nets was calculated as 167.7mm. Based on stomach contents, ring-shaped worms and larval shrimp equally made 29% of the total frequency showing the highest contribution. Comparison of mean length indicated 3cm in decrease in 1382-83 when compared to 1374-75. Population dynamics parameters were estimated and the exploitation rate was estimated to be E = 0.54. The usual stretched mesh size of nets for P. niger was 146mm and 81% of the total fish landed were smaller than Lm50%.In 1381,total catch of the species increased four and a half-fold in comparison to 1376, while total efforts decreased up to 28% and CPUE increased two and a half-fold.
    Keywords: Biology ; Fisheries ; Iran ; Oman Sea ; Investigation ; Biological ; Tiger toothed Croaker ; Otolithes ruber ; Javelin grunter ; Pomadasys kaakan ; Black pomfret ; Parastromateus niger ; Season ; Fishing
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    Survey on parasitic infections of Barbus spp. from south-west of Iran (Khouzestan Province) (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25108 | 18721 | 2018-08-24 06:17:44 | 25108 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: A survey on parasitic infections on Barboid fishes of South- west of Iran (Khouzestan province) were done during Spring 2002 to Autumn 2004. Altogether 296 specimens from 5 different fish species were examined. The fishes were collected from five stations of Karoun River (Ahwaz-Goulestan, Molasani, Dez Dam), Karkheh River (Hamidia Dam) and Shadgan Lagoon. The fishes transported alive to the laboratory where they measured and weighted. Then they were killed by cutting the spinal cord. According to the results of this study 22 different parasites were revealed, 15 of then detected to the species level and 7 of them to the genus level. The metazoans are as follows: The monogenea, are Dactylogyrus onchoratus, D.persicus. Two digeneans: Diplostomum spathaceum, Asymphilodora sp. Five nematods: Rhabdochona denudata, Philometra karuensis, Philometra sp., Psudocapilaria tomentosa Contracecum larvae sp. and only one acanthocephalus, Neoechinorhynchus. Three protozoans are: Ichtyophthirius multifiliis, Trichodina sp., Goussia sp., Balantidium sp. And Myxozoans: Myxobolus persicus M. karuni M. nodulointestinalis, M iranicus, M.mesopotamia, M. pfief eri, Myxobolus sp., Myxidium rhodei, Myxidium pfiefferi. Histopathological investigation of some parasites was done as well. Pathologacal potential of M. nodulointestinalis and M. pfiefferi were revealed. According the results of this study three new parasites and eleven new hosts for Iranian freshwater fishes and three new host for three Myzoxoans were introduced.
    Keywords: Biology ; Ecology ; Fisheries ; Iran ; Khouzestan Province ; Barbus fishes ; Parasites ; Protozoa ; Metazoa ; Dactylogyrus onchoratus ; Rhabdochona denudata ; Philometra karuensis ; Species ; Fish
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    The effect of attractant on the growth factor and survival rate of Penaeus semisicatus (green Tiger) (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25109 | 18721 | 2018-08-23 05:41:58 | 25109 | Iranian Fisheries Science Research Institute
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    Publication Date: 2021-07-16
    Description: This project was carried out in 2000 to determine the effect of attractant diet on growth and survival rate of Penaeus semisulcatus in fifteen treatment each with three replication were applied for 45 days. The results indicate that 40I B, 40II and T foods had highest effect on mean weight which were 0.1556, 0.1492 and 0.1164 grams respectively. The yield data were compared with regression which showed us the positive correlation coefficient between yield and food consumption was 0.75.
    Keywords: Aquaculture ; Biology ; Iran ; Penaeus semisulcatus ; Food consumption ; Mean Weight and growth ; Survival rate ; Growth factors ; Green tiger
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    Determining nutritional requirements in Beluga (H.huso) from larval stage to marketable size (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25107 | 18721 | 2018-08-24 06:13:27 | 25107 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: Growth experiments were designed and conducted in several phases in order to determine the most suitable starter diet, to determine the effects of different levels of protein and energy and also to determine the effects of different ratios of carbohydrate to fat on growth and body composition in farmed Huso huso from the larval stage up to the marketing stage. Phase one Growth experiments were conducted in a random statistical design to compare growth trends in H. huso larvae (mean weight 105.02 ± 0,02 mg) without being adapted to formulated diets. Experiments were conducted in fibreglass tanks (500 litre capacity) under similar culture conditions. Four replicates were run for each experiment. Larvae were fed four types of formulated diets (Diet A=100 % formulated diet produced in the International sturgeon Research Institute, Diet B=formulated diet imported from Holland, Diet C= formulated diet imported from France, Diet D= a mixture of Diet A + 10% gammarus) 8 times a day to satiation for a period of 49 days. The results obtained were compared with those obtained for the control group that was fed live food (Daphnia and Artemia). Mean water temperature during the experimental period was 18.52 ± 0.48 °C and mean dissolved oxygen was 7.35 ± 0.18 mg/l. The first signs of food granules were observed in the guts of the larvae after 12 h of the first feeding. All experimental groups were adapted to granulated diets on day 3 to day 5. In the beginning of the experimental period the larvae showed a no normal distribution (P 0.05) in terms of weight and length. However significant differences were observed in the end of the experimental period among the different groups studied in terms of growth, specific growth rate and food efficiency (P 0.05). Growth in group B and D were significantly higher than that in other groups except for the control group (P 0.05). It may thus be concluded that the olfactory organs of larvae took to Diet B (may be due to its composition) and to the diet D (because of its odour, texture and suitable flavour) more readily than other diets. At the end of the experimental period, maximum survival (98%) belonged to the control group. Survival rate in Group B and Group D was 90 % and 86.5%, respectively (P 0.05). Minimum survival belonged to fish fed Diet A (29.7%) and Diet C (45.5%). With regard to the adaptability of larvae to formulated diets, survival rates and growth and development in larvae we may conclude that the effects of different formulated diets on growth in larvae can be conducted on larvae with a mean body weight between 100 to 120 mg. In this weight class the digestive system and olfactory organ are fully developed and play a vital role in searching for food particles.
    Keywords: Aquaculture ; Biology ; Iran ; Huso huso ; Protein to energy ratio ; Carbohydrate to fat ratio ; Body composition ; SGR
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    The survey of feeding and reproduction of cetenophora Mnemiopsis leidyi in the southern of Caspian Sea (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25112 | 18721 | 2018-08-23 05:48:23 | 25112 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: Menmiopsis leidyi was entered into Caspian Sea from Black Sea and mass population constitutes in the southern Caspian Sea. In this surveys, the relationship between length and wet weight measured and length and weight followed by this equation: n=384, R^2=0.87 w=0.003L^9005 . The relationship of dry and wet weight calculated, in this surveys, the ratio of dry weight to wet weight was equal to 1.615% in 12 salinity. In vitro, the clearance rate at 12 and 27 C were 52.48 and 107.33 ml/h, respectively, daily ration at above temperatures were 1.98 and 16.65 respectively. Mnemiopsis leidyi can feed Acartia in accordance to 16.5 mg/1gbw (body weight) at 27 C in one day. The average digestive time in 12 C and 27 C were 77.50 min and 36 min respectively. The digestive value in 27 C was 2.5 fold than 12 C. The result indicated that clearance rate, daily ration and digest were increased in high temperature. Stomach content of Mnemiopsis leidyi was shown that this organism utilized from Acartia and Balanus, in addition, stomach content of kilka including two species of zooplankton from the southern Caspian Sea. Stomach contents of clupeonella cultiventris contain more than 54 percent of Acartia and its nauplii. This frequency observed in cluponella engrauliformis and clupeonella grimmi. On basis of zooplankton sampling in the sea, over 90 percentage of zooplankton populations contain Acartia.
    Keywords: Biology ; Iran ; Caspian Sea ; Menmiopsis leidyi ; Zooplankton ; Population ; Survey ; Feeding ; Cetenophora
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    Identification of native fishes of western Azarbaijan province - phase 1: northern water source (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25116 | 18721 | 2018-08-24 06:19:54 | 25116 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: The aim of this research was to identify fish species distributed in the water resources located at West- Azarbaijan province. Sampling was done seasonally, from 14 sampling sites in main branches of different rivers including Aras, Zangmar, and Ghator. Fish samples caught with different tools, fixed in 10 % formalin, and finally transferred to the laboratory for biological investigations. The identified fish were 25 species belonging to 8 fish family comprising of Cyprinidae, Balitoridae, Cobitidae, Siluridae, percidae, poecilliidae, Gobiidae, Salmonidae. Among them, cyprinidae family had the highest percentage of diversity. There were 2 species from Balitoridae and 1 species from the rest of other family.
    Keywords: Biology ; Fisheries ; Iran ; Western Azarbaijan province ; Identification ; Native fishes ; Water
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    A survey of some biological aspects of cobia (Rachycentron canadum) (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25125 | 18721 | 2018-08-26 13:28:59 | 25125 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: Biology aspects of cobia (Rachycentron canadum) were investigated from October 2005 to December 2006 in Northern waters of Persian Gulf (Hormozgan province).The reproduction cycle, sexual maturity, sex ratio, Fecundity, Lm50, feeding, length frequency, growth parameters and mortality of cobia were studied from total of 509 specimens ranged from 19 to 159 fork length. Gonadosomatic index peaked during spring and summer with main peak in June. Spontaneous spawning occurs around the year with peak in June. The overall female to male ratio was significantly 1 : 1.49 (P〈0.05). Batch fecundity were estimated 1684954±118990 in 15 females. Relationship between total length and fecundity were calculated F=1.3717TL 2.9567 (r^2= 0.82). Feeding studies indicated that the bony fishes were main food of cobia (76%) and followed by crustaceans (25%) and mollusks (11%). Rays were least food items (22%). Maximum and Minimum GaSI were observed in March (33%) and August (0.07%) respectively. Females reached 50% sexual maturity at 81.25 cm TL. The total length -weight relationship was W=0.0042L3.1162 (r^2=0.9852). Thetotal length-fork length relationship was TL= 1.1561FL-2.533 (r^2= 0.9933). Growth parameters K, L, and t_0 were calculated by von bertalanfy growth equation: 0.11 (year1), 168.65 cm, 3.49 and -0.97 respectively. The instantons rate of total mortality (z), natural mortality (M) and fishing mortality estimated by catch curve analysis were 0.30, 0.25, 0.14 (year1). Exploitation rate and Tmax were 0.36 and 28 year respectively.
    Keywords: Biology ; Iran ; Persian Gulf ; Hormozgan province ; Rachycentron canadum ; Cobia ; Sex ratio ; Fecundity ; Lm50 ; Feeding ; Mortality ; Growth ; Parameters ; Biology ; Maturity ; Spawning ; Fecundity
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    Recognition of fishes in rivers and basin of Qom (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25143 | 18721 | 2018-08-26 16:50:02 | 25143 | Iranian Fisheries Science Research Institute
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    Publication Date: 2021-07-16
    Description: This study was carried out on rivers, basins & qanat of Qom region during the 1376-1378and Fish samples were taken from 2 permanent rivers (Qomrood ,Ghara_chag)& from some seasonal ones (Tagharood, Zavarian, Vesva, Biraghan). Also local fishes was followed in 100 qanats in the region and Random fish sampling was done in permanent river extension out of province. This study aimed to recognize different fish species in the province water reservoir and estimating the fisheries potential in the province. For fish sampling nets such as mashk, salik, hook and hand tailored were used. Electroshoker was not used at all. Results of fish recognition showed that fish samples belong to 12 species & 4 family of "cyprinidae", "Balitoridae", "cyprinodontidae" and "poecilidae".The qanat fishes of the montain (kahak, Khagestan) and pastora area (Ghanavat,jafarabad) included by two families of "cyprinid", "Balitoridea".In some qanat which were connected to rivers more species of fish and anotherAquatic animal were observed & sampled.At the and map of geographical distribution of local fishes was planned.
    Keywords: Biology ; Iran ; Qom province ; Qomrood ; Ghara_chag ; Tagharood ; Fish ; Samples ; Species ; Fisheries ; Electroshoker ; Cyprinidae ; Balitoridae ; Cyprinodontidae ; Poecilidae ; Aquatic ; Recognation
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    Investigation of production possibility of monosex female and sterile fish in rainbow trout Oncorhynchus mykiss (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25147 | 18721 | 2018-08-26 16:54:41 | 25147 | Iranian Fisheries Science Research Institute
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    Publication Date: 2021-07-16
    Description: This investigation carried out for the first time in Iran inorder to prodcution of monosex female and also sterilization in Rainbow trout. In this study, the eggs of general females were fertilized with the sperm of sex reversed male and so monosex female population was produced in second generation and sterilization carried out with oral administration of 17α methy 1 testosterone and immenrsion and oral administiration methods were used in embryonic stage and from commencing of acitve feeding of larvae, respectiverly. For sex reversal , 13 treatments were considered totally, that the most percentage of male (100%) was observedc in a treatment including of orally administration of 0.5 ppm hormone for 60 days after commencing active feeding (P〈0.001). In the other treamtnet, different percentages of sex ratio including male, female, intersex and sterility were observed. The offspring of genral eggs fertilization with the sperm of masculinized fish were 100% female, chisquare test was shown the treatment of orally administration of 30 ppm hormone for 120 days after commencing active feeding that had been considered for sterilization, was produced 90% sterile fish (P〈0.001) and was changed the sex ratio significancthy. Morphological changes of the gonads and sperm ducts in matured fish and also histological changes in the gonads of fish in the treamtints were considerable.
    Keywords: Biology ; Iran ; Monosex ; Female ; Male ; Sterilization ; Rainbow trout ; Eggs ; Fertilized ; Sperm ; Population ; Sex ; Fish ; Oncorhynchus mykiss ; Rainbow trout
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    Potential estimation and exploitation of large pelagics in the Persian Gulf and Oman Sea (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25137 | 18721 | 2018-08-26 16:54:02 | 25137 | Iranian Fisheries Science Research Institute
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    Publication Date: 2021-07-16
    Description: In order to come up with the responsible fishing pattern, there was a need to identify some of the biological characteristics and population dynamic parameters of yellowfin tuna, skipjack and longtail tuna in the Persian Gulf and Oman Sea. Occurrence of empty stomach was high in all the specimens obtained from the gill net fisheries. Purple back flying squid was the most dominant prey species observed in the yellowfin tuna study (61% in males and 57% in females). The length of maturity (Lm50%) for yellowfin tuna was estimated 76 cm, 62.5 cm skipjack and 62.5 cm longtail tuna. Length range of skipjack was from 31-100 cm and bony fishes were the most dominant prey species observed in the skipjack. The monthly gonad somatic index was driven higher values after June which could be indicated as spawning period. The catch per unit of effort of three purse seiners (Azadegan 1, 2, 3) was compared in 1998- 2000. The species composition was 47% yellowfin tuna, 51% long tail tuna and 2% skipjack.
    Keywords: Biology ; Iran ; Persian Gulf ; Oman Sea ; Pelagics ; Biological characteristics ; Population ; Yellowfin tuna ; Skipjack ; Longtail tuna ; Specimens ; Gill Net ; Fisheries ; Purple back flying squid ; Species ; Maturity ; Length ; Gonad Somatic Index ; Spawning ; Estimation ; Potential
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    Surveying the biology of Capoeta capoeta gracilis and it s distribution, the goal aquaculturize the species (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25150 | 18721 | 2018-08-26 16:58:21 | 25150 | Iranian Fisheries Science Research Institute
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    Publication Date: 2021-07-16
    Description: This Research has been done monthly in Sefidroud River and its tributaries from Agust 2003 to July 2004. From the total number of 2027 specimens of caught fish, 800 and 629 were males and females respectively, and 598 specimens were undistinguished. Samples were caught by cast nets. Fork length range of all specimen was 33-255 mm (119.56 ±46) and their weight rang was 0.42-257.5 gr (34.4 ±39.06) gr and their age range was 0-5 (1.76 ±0.959) year. The average of relative frequency in C.c.gracilis was 65.1 % . The average of condition factor was 1.07±0.13. Between Fork length and weight of C.c.gracilis. Was exponential relation and coefficient of correlation was estimated 99.11%. Growth cofficient (k) was 0.114 ; L_∞ was estimated 373.5 mm. C.c.g consumed of Chrysophyta phylum more than other Phytoplankton phyla in Sefidroud river and from Bentic point of view, consumed of clay, Filamentous algae detritus, insects, seeds. Absolute fecundity range was 1823-9274 (4553.8 ±2169.1) eggs. Considering the GSI and frequency percent of maturity stages, spawning period of the fish begins from April and peak of spawning is in June and terminates in July.
    Keywords: Biology ; Iran ; Sefidroud River ; Survey ; Capoeta capoeta gracilis ; Aquaculturize ; Species ; Specimens ; Males ; Females ; Fish ; Samples ; Weight ; C.c.gracilis ; Growth ; Chrysophyta phylum ; Phytoplankton phyla ; Filamentous algae detritus ; GSI ; Maturity ; Spawning
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    Study of diversity & abundance of ichthyoplankton in Sistan & Baluchestan Province (phase: Guatr Creek & Bay) (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25151 | 18721 | 2018-08-26 16:53:58 | 25151 | Iranian Fisheries Science Research Institute
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    Publication Date: 2021-07-16
    Description: Identification & determination of abundance Ichthyoplankton in Gouatr (Creek & Estuary) in Chahdahar region was carried out from Octber 2005 to September 2006. Sampling period was seasonal and 6 stations were selected. Sampling stations no. 1, 2 ,4 were located in the sea waters of Creek , no.5 & 6 in Gouatr Estuary and no.3 was near to Bahokalat Estuary. The results of environmental factors measurement were as follaws: Main depth of area: 4m, Salinity: 37.08 (g/l), pH: 8.19, air temperature: 29.8? and water temperature: 27.3?, Clarity: 0.75m Sampling was conducted using single ring Bongo-net with 333µ of mesh size. Totally, 585 specimens of diverse fish larvae stages were collected in 20 sampling. The dominant families of fish larvae were Gobiidae, Clupeidae and Engraulidae with 86% of total abundance and 11 families of fish larvae were identified. Most of the fish larvae were observed in winter season and some of them such as Clupeidae, Gobiidae, Blennidae Engraulididae and Sillaginidae were found in most season. The stage of the most samples was Preflexion (87%) therefore , the area is a nursery ground. Commercial fish larvae were carangidea, Sparidae, Clupeidae, Sillaginidae, Hemiramphidae, Engraulidae and Nemeptridae but they were only 37% from total abundance. The main diversity was 0. 6236. There is no correlation between abundance, temperature and salinity. The results showed a significant different between abundance from pre monsoon and post monsoon but no significant different between diversity in pre monsoon and post monsoon.
    Keywords: Biology ; Iran ; Guatr ; Sistan & Baluchestan ; Larvae ; Fish ; Identification ; Abundance ; Diversity ; Ichthyoplankton
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    Studying native fishes in Hamadan province (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25437 | 18721 | 2018-09-23 16:57:02 | 25437 | Iranian Fisheries Science Research Institute
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    Publication Date: 2021-07-16
    Description: Studying native fishes of Hamadan province have been done in 159 stations from 51 important water resources (wetland, reservoir, spring, river and qanat) using with electric tool, cast-net, seine and gill-net gears from July 2010 to Oct. 2011 and the main aims were species identifying and determining their distribution and abundance in the studied area. In the study, 33411 fish specimens are caught in 257 times of sampling and selected randomly about 8500 individual and laboratory works showed the fish belong to 37 species from 7 families. Cyprinidae with 25, Nemacheilidae with 6 and Sisoridae with 2 species had the most diversity and Cobitidae, Poeciliidae, Salmonidae and Mastacembelidae had only a representative. 31 fish species were native or endemic and 6 species were alien. Fish species existed in all rivers of Ghezelozan and Sirvan sub-basins but there were not any fish in 10 rivers of Ghara-Chai sub-basin and in 6 rivers of Gamasiab sub-basin, too. Also, it was observe 1-3 fish species in 15 rivers, 4-6 fish species in 10 rivers, 7-10 fish species in 5 rivers and more than 10 fish species in 4 main water resources and Gamasiab sub-basin with 32 fish species was the most diversified and Ghezelozan sub-basin with 2 fish species was the least diversified. There were any species to 4 (mostly 1 or 2) fish species in studied qanats in Ghara-Chai and Gamasiab rivers sub-basins. 23 fish species existed in a subbasin, 12 species in 2 sub-basin, Capoeta capoeta in 3 sub-basin and Squalius cephalus in all sub-basins of studied area. Alburnoides nicolausi,Capoeta aculeata and Alburnus mossulensis have had the most frequency. Studying fish abundance showed Oxynoemacheilus argyrogramma with 17.8%, Garra rufa with 12.3%, A. mossulensis with 12.1% and C. aculeata with 10.2 % of total number of caught fish specimens are dominant. S. cephalus, Capoeta damascina, C. aculeata, C. trutta, Chondrostoma regium and A. mossulensis have had sport fishing value but Acanthobrama marmid, Oxynoemacheilus kiabii, Oxynoemacheilus kermanshahensis, Turcinoemacheilus kosswigi, Alburnus caeruleus and Mastacembelus mastacembelus have biodiversity value for being endemic or having limited habitats in Iran.
    Keywords: Biology ; Iran ; Hamadan Province ; Gamasiab River ; Ghara-Chai ; Gaveh Rud ; Ghezelozan ; Fish diversity ; Abundance ; Distribution ; Specimens ; Sampling ; Cyprinidae ; Nemacheilidae ; Sisoridae ; Cobitidae ; Poeciliidae ; Salmonidae ; Mastacembelidae ; Capoeta capoeta
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    The study on fishing and resource management of bony fisheries within southern Caspian Sea (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25444 | 18721 | 2018-09-23 17:01:05 | 25444 | Iranian Fisheries Science Research Institute
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    Publication Date: 2021-07-16
    Description: The project of the Study on fishing and resource management of fisheries within Southern Caspian Sea was conducted on the base of an agreement made between fisheries organization (Shilat) and the Iranian fishery research organization (IFRO) signed in 2010. In this library-based study the current situation of bony fish fisheries and biology of these species has been surveyed in Iranian waters of the Caspian Sea . In this survey internal and external environmental factors of bony fishes activities were considered. Using SWOT analysis method, current situation of fisheries was investigated..One of the most important strategies for conserving anadromous species such as Caspian kutum , common carp, roach, bream and …. is rehabilitation of the natural spawning ground in rivers, coastal lagoon specially Anzali lagoon .By conducting this strategy not only restocks of bony fishes is done ,but also reduced the cost of artificial restocking programs and releasing fingerlings .In short term , it is nessesary to enhance the stocks of the species that have low catch is done by huge releasing of the fingerlings and study the qualification of the program.
    Keywords: Ecology ; Management ; Iran ; Caspian Sea ; Anzali lagoon ; Bony fishes ; Distribution ; Stocks ; Biology ; Fishing ; Species ; Caspian kutum ; Common carp ; Roach ; Bream ; Spawning ; Fingerlings
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    Identification and extraction of streptococcusis gene from streptococcus iniae and recording in Gene Bank (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25458 | 18721 | 2018-09-26 09:47:40 | 25458 | Iranian Fisheries Science Research Institute
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    Publication Date: 2021-07-16
    Description: S. iniae is an important pathogen in both marin animals and humans, causing systemic infections in these hosts. The symptoms of infections are very similar to symptoms of infections caused by human¬specific streptococcal pathogens. The enzyme phosphoglucomutase (PGM) has recently been discovered to play an important role in polysaccharide capsule production and virulence in s. iniae. We aim to isolate S. iniae and cloning phosphoglucomutase gene. S. iniae grew on sheep blood agar as mucoid and beta- hemolytic colonies after 24 h of incubation at 37C. Then confirmed it by sensitive and rapid method of PCR. The pgm gene was amplified successfully and cloned in pTZ57R cloning vector.The recombinant plasmid was sub cloned into pETDuet-l expression vector by rectriction enzymes and confirmed by PCR. Although S. iniae is a pathogen of economic importance, relatively little is known regarding mechanisms of its pathogenesis and few specific virulence determinants have been established. These include the enzyme phosphoglucomutase which contributes to cell wall integrity and resistance to antimicrobial peptides. Thus, this enzyme is the best choice to product the vaccine and more investigations.
    Keywords: Biology ; Iran ; Streptococcusis ; Gene ; Streptococcus iniae ; Gene Bank ; S. iniae ; Pathogen ; Enzyme ; Phosphoglucomutase ; PCR
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    Study of some biological characteristics (Tiger tooth croacher, Silver pomfert, Yellow fin seabream, Hilsa shad, Indo-pacific king mackerel, Narrow-bared Spanish mackerel) in the coastal waters of the Persian Gulf (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25170 | 18721 | 2018-09-03 14:16:38 | 25170 | Iranian Fisheries Science Research Institute
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    Publication Date: 2021-07-16
    Description: The present study was carried out in the fishing landing center in khozestan using the commercial catch data. The data of total cutch of fishes and effort were prepared from the deputy of statistic office. Based on the pre data, the effort of gill-net fishery was being decreased from 1996 to 2000 and then had a trend to increase from 2001. The maximum and minimum of trap fishery of dhows ware observed 2005 and 1996 respectively. The maximum and minimum of total catch were observed in 2005 in Hilsha shad and Spanish mackerel with 4174.95 tones and 73.33 tons respectively. In this year the total catch of silvery pomfret and tiger tooth croaher species were recorded 323.6 tones and 1700.44 tons respectively. The growth parameters of Hilsha shad were estimated from 10071 specimens in Abadan and 4032 specimens of length frequencies from Hendijan, statistic program of t-test was used for the mean total length and the results showed the significantly different (p 〈 0.05) in the two areas during 12 months. The Von Bertalanffy growth parameters were estimated from the FISAT II and ELEFAN.The asymptotic length (L) was estimated using the Powell – Vetheral method in Abadan and Hendijan, 42.74 cm and 37.02 cm respectively. Growth coefficient or K for both areas were 0.77 and 0.71 per year respectively. The instantaneous rotes of total mortalities (Z) were estimated from length-converted catch curves and the values were at 2.55 year^-1 for Abadan and 2.81 year^-1 for Hendijan. The instantaneous rate of natural mortalities (M) and fishing mortalities (F) for both areas, Abadan and Hendijan were 0.75 year^-1, 0.732 year^-1 and 1.8 year^-1, 2.078 year^-1 respectively. The exploitation rates (E) for both populations were 0.7 year^-1 in Abadan and 0.73 year^-1 in Hendijan. However the optimum level of E should be 0.5 and the estimated valves of E is more than 0.5 and shows the pressure of fishing effort and overexploited on the population of this stock. The instantaneous rate of total mortalities of Tiger tooth croacker was 1.95 year^-1 the instantaneous rate of natural mortality using Pauly empirical formula was estimated 0.7 year^-1 and fishing mortality were 1.52 year^-1. The exploitation rate for this species was calculated 0.62 year^-1. The values of M and F for silvery pumfret were obtained 0.91 year^-1 and 1.47 year^-1 respectively. The exploitation rate was estimated 0.61 year^-1.
    Description: ;
    Keywords: Biology ; Iran ; Persian Gulf ; Khozestan Province ; Abadan ; Hendijan ; Biological characteristic ; Tiger tooth croacher ; Silver pomfert ; Yelow fin seabream ; Hilsa shad ; Indo-pacific king mackerel ; Narrow-bared Spanish mackerel ; Fishing ; Gill net ; Fishery ; Specimens ; Mortalities ; Coastal waters
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    Comprehensive study on assessment of sturgeons population genetic structure in the Caspian Sea (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25174 | 18721 | 2018-09-03 17:15:43 | 25174 | Iranian Fisheries Science Research Institute
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    Publication Date: 2021-07-16
    Description: The population genetic structure of five Caspian Sea sturgeon species was investigated. Totally 1121 samples of caudal and unault's fin tissue of the sturgeons (Acipenser persicus, A. gueldenstaedtii, A. stellatus, A. nudiventris and Huso huso) were collected from the Volga River (Russia), Ural River (Kazakhstan), Kura River (Azerbaijan), Sepidrud River and the coastline of the south Caspian in the Iranian waters as well as from the sampling stations selected for the marine survey for sturgeon stock assessment in the Caspian Sea. All samples were stored in 96% ethyl alcohol and transferred to the genetic laboratory of the International Sturgeon Research Institute. Genomic DNA was extracted using phenol-chloroform method. The quality and quantity of DNA was assessed by Agarose gel (1%) electrophoresis and spectrophotometry. The population genetic structure of Ship and Persian sturgeon was studied using both PCR-RFLP (D-loop and ND5/6 gene) and microsatellite technique and that of H. huso, A. stellatus and A. persicus were studied using microsatellite technique. After amplification of genes using PCR, the RFLP technique was used to digest mtDNA using restriction enzyme. The PCR products were electrophoresed on 6% sequencing polyacrylamide gels followed by silver nitrate staining. Data for PCR-RFLP were analyzed using REAP program and those from microsatellite technique were analyzed using Gene Alex. Population genetic parameters including allele frequency, expected and observed heterozygosity, effective allele, Shannon's index were determined. Genetic identity and distance were calculated following Nei criteria and Hardy Weinberg equilibrium was tested based on X2 and analysis of molecular variance (AMOVA) using Reap and Gen Alex at 99% confidence limit. Phylogenetic relationship was determined and drawn using TFPGA program. The population genetic structure and genetic diversity of the 1121 sturgeon specimens were determined. Three independent populations were identified for Acipenser persicus (two populations in the south Caspian in the Iranian waters and one in the north Caspian). Three independent populations were identified for A. gueldenstaedtii (Volga, Ural and South Caspian populations) using the microsatellite technique. Population genetic structure using PCR-RFLP revealed no genetic differentiation among the A. gueldenstaedtii specimens studied from the different regions using ND5/6 gene, while two populations (Ural and south Caspian populations) were detected for this species with the same technique using D-loop genes. Four independent populations (Volga, Ural, Kura and Sepidrud populations) were reported for A. stellatus using the microsatellite technique and four more populations which most probably belong to the autumn and spring races of the above mentioned independent populations were identified for this species. The present study also identified two populations for H. huso; The North Caspian population (in Volga and Ural Rivers) and The South Caspian population (in Golestan and Guilan regions) which were significantly different from each other (P〈0.01). The genetic population structure of A. nudiventris was studied using the microsatellite and PCR-RFLP techniques which revealed two populations for this species one in the Ural River and the other in the Sepidrud River (South Caspian). Comparison of the ND5/6 and D-loop genes studies in Russian sturgeon revealed that the D-loop gene is better than the ND5/6 genes in population's differentiation and is therefore strongly recommended for population genetic studies on sturgeons in the Caspian Sea. Genetic diversity studied using microsatellite technique was higher and more accurate as compared to that using RFLP. Nevertheless the RFLP technique was able to introduce molecular markers for the population’s species pacific identification. On developing suitable primers these studies can be speeded up and the cost of such studies can be cut down. However the drawback in using microsatellite technique for population genetic studies is that it cannot introduce a molecular marker for the identification of populations. The present study was able to introduce molecular markers to differentiate the ship sturgeon population in the south Caspian from that in the Ural River using the PCR-RFLP technique Based on the results obtained it is strongly recommended that all activities related to restocking and rehabilitation of sturgeon stocks in Iran be conducted on the basis of genetic principles. Also serious and immediate measures should be taken for the restoration and conservation of rare population of native species of Iran particularly in the Sepidrud region using genetic markers before they are become extinct.
    Keywords: Biology ; Iran ; Caspian Sea ; Guilan Province ; Golestan province ; Sepidrud River ; Assessment ; Sturgeons ; Population ; Genetic ; PCR-RFLP ; Microsatellite ; Species ; Samples ; Tissue ; Acipenser persicus ; A. gueldenstaedtii ; A. stellatus ; A. nudiventris ; Huso huso ; Survey
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    Study on effects of Beta-glucan & extraction of Sargassum & Padina algae in prevention and treatment of WSD in Fenneropenaeus indicus (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25179 | 18721 | 2018-09-03 17:23:17 | 25179 | Iranian Fisheries Science Research Institute
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    Publication Date: 2021-07-16
    Description: In this study two species of algae, Sargassum glaucescens and Padina boergeseni that found plenteously in Persian Gulf and Bushehr coast, were collected and hot water extracts of them were lyophilized. F. indicus (11.32±1.20 g), after two weeks adaptation in Shoghab research station were immersed in seawater (39 ppt and 25±1 ○C) containing hot-water extract of each brown algae, S.glaucescens and P.boergeseni, at 100, 300 and 500 mg/l concentration, Survival rate and immunological parameters (total haemocyte count (THC), total plasma protein (TPP), Phagocytic activity, bacterial clearance efficiency and bactericidal activity) were examined. In addition effect of dietary administration of beta 1, 3 1, 6 glucan on prevention of White Spot Disease and immunological parameters of shrimp were investigated. According to results, immersion in seawater containing 300 and 500 mg/l concentration of algal hot-water extract after 2 and 3 hours or oral administration of beta 1,3 1,6 glucan at level of 10 g/kg diet for 14 days significantly enhanced THC, TPP, Phagocytic activity, bacterial clearance efficiency and bactericidal activity. Immersion in seawater containing 100, 300 and 500 mg/l hot-water extract of S.glaucescens after 3 hours, improved the survival rate of WSSV-infected F. indicus.
    Keywords: Biology ; Chemistry ; Iran ; Persian Gulf ; Bushehr Province ; Beta-glucan ; Sargassum ; Padina algae ; WSD ; Fenneropenaeus indicus ; Species ; Algae ; Brown Algae ; S.glaucescens ; P.boergeseni ; Survival rate ; White Spot Disease ; Shrimp
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    Primary fish cell culture phase 1: primary cell culture of the interior pituitary gland of the Acipenser gueldenstaedtii (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25177 | 18721 | 2018-09-03 17:18:50 | 25177 | Iranian Fisheries Science Research Institute
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    Publication Date: 2021-07-16
    Description: Fish cell lines have been used to support many areas of research, beginning with fish viruses and extending into immunology, genetic studies, toxicology, environmental effects, aquaculture and seafood quality and it is the first step in the gene banking, to preserve gene materials. The present study we cultured cell of interior pituitary of the Acipenser gueldenstaedtii gland, as a first attempts in IRAN. FISH cell culture has widespread applications in virology, toxicology and as in vitro models in cytogenetic, biomedical, physiological researches. A cell line has been established from the Acipenser gueldenstaedtii interior pituitary and scales have been used to develop primary cell cultures. Recently, successful primary culture of the interior pituitary gland of Acipenser gueldenstaedtii has been developed by explants method. The present study evaluated the potential of several interior pituitary gland from different developmental stages for development of cell cultures using explants method. Pituitary gland from various stages of the adult Acipenser gueldenstaedtii was collected under standard aseptic conditions. Developing gonads from 15-20-year-old male and female sturgeon were collected during late April and early May2007. In all the cases the tissues were pooled in cold PBS antibiotic antimycotic solution (Sigma Chemicals, USA). The tissues were evaluated for attachment, growth and ability to undergo to produce suspension of cells. Primary cultures were initiated from the above tissues according to our earlier procedures, with certain modifications in the sub cultivation procedure. Briefly, tissues were cut into 1 mm3 size fragments which were seeded into 25 cm2 tissue culture flasks. After appropriate semidrying and addition of minimum essential medium (MEM) (Sigma, USA) supplemented with 15% fetal bovine serum (FBS) (Sigma, USA), cell growth was monitored. A seeding density of 1.5 105 cells as determined by a hemocytometer. The results have been showed the Acipenser gueldenstaedtii interior pituitary cells growth in incubator Co2 in 370 C, the cells adapted in this temperature. They were in Lag phase for 10 days, in log phase on 10- 22 days, and in stationary phase on 23- 28 days, after that they died. So we could produce sturgeon growth hormone from fish pituitary cells culture. By this study we can passage the cells on 21th day, for every week. In this way we can produce continued cell culture and store them for gene banking.
    Keywords: Biology ; Iran ; Acipenser gueldenstaedtii ; Pituitary gland ; Primary cell culture ; Fish
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    Identification of genetic marker for differentiation of Persian sturgeon (Acipenser persicus) from Russian sturgeon (A. gueldeustadtti) (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25519 | 18721 | 2018-10-05 15:40:50 | 25519 | Iranian Fisheries Science Research Institute
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    Publication Date: 2021-07-16
    Description: The Persian sturgeon (Acipenser persicus) is more abundant sturgeon species in the South Caspian Sea and consist the highest proportion of Iranian Caviar, meat as well as bringing maximum foreign currency income, however from systematic point of view and differentiation of this species from Russian sturgeon (Acipenser gueldenstadttii) a serious challenging issues remain, where some Russian scientist are believe that the Persian sturgeon is not as an valid species and consider it as a subspecies of Russian sturgeon. This research conducted with the objective of identification and introducing a molecular marker based on specific DNA for differentiation of two species of Persian sturgeon and Russian sturgeon via a proved molecular marker method. For this purposes 8 different molecular approaches such: Microsatellite, AFLP, RAPD, sequencing of Cytb, 16sDNA, ND5, Growth Hormone gene and finally Single Nucleotide Polymorphism (SNP) were investigated. Based on applied methodology, between 5 to 16 caudal fin tissues were sampled for each species from different region of the Caspian Sea, Sefiedrud River, Ural and Volga rivers. Following DNA extraction, its quality and quantity were determined and the PCR experiment has been conducted using 5-110 primers according to various methods and type of gene. The PCR products were electrophoresed on Polyacrilamid or agarose gels and followed by silver and Ethidium Bromide staining. In RAPD method, polymorphic DNA band was cut on the gel followed by purification and then the segments were cloned in vector in Top10 strain of E.coli, and then sequenced. Meanwhile for Growth Hormone gene in Persian and Russian sturgeon the MEGA 4, Gene runner software were used to design the appropriate primers for PCR amplification. The PCR products were cloned in PTZ57R/T vector and transformed in Top10 E.coli strain and sequenced finally. For all other genes, similar methods were applied for PCR amplification and its products were sequenced and statistical analysis as well as phylogenetical tree was performed. In Single Nucleotide Polymorphism (SNP) method, after genomic library construction, in total 14.4 billion nucleotides were sequenced and similarity/ differentiation analysis of two species were investigated using specific bioinformatic software. Results indicated that Microsatellite and AFLP methods showed high level of genetic variation both within and between species. The Cytb gene, when 4 sample sequences from each species were compared two species were differentiated, however when analysis repeated over 15 samples, the sequence comparison couldn't differentiate two above mentioned species. Full sequence comparison of 16sDNA and mtDNA-ND5 gene showed variation in some nucleotide in both species of Persian and Russian sturgeon but no significant. Results of sequences obtained from cloned segment with RAPD method and also specific primer design based on produced sequences could succeed to discover a variable DNA band that able to differentiate two species from each other. Results of the present study also showed that the growth hormone gene (GH) of Persian and Russian sturgeon consists of 645 nucleotide that translate to 214 Amino Acids. The sequence comparison indicated that the gene coding growth hormone in Persian and Russian sturgeon had the highest similarity with GH of Mammals (71%), Anguilaformes (63%) and less similarity with bony fish (37%). Phylogenetic analysis indicates that Persian and Russian sturgeon in compare to other organism are ancient species and this gene is originated from a common ancestor. At present study the most appropriate results obtained from Single Nucleotide Polymorphism (SNP) method by sequencing 14.4 billion nucleotide from genome of two species of Persian and Russian sturgeon from North and the South Caspian Sea could prove that the Persian sturgeon is a valid and independent specie. This excellent results is the biggest scientific achievement for differentiation of two highly commercial important sturgeon species in the Caspian Sea in last two decades.
    Keywords: Biology ; Iran ; Caspian Sea ; 16S rDNA ; Acipenser persicus ; Persian sturgeon ; Acipenser gueldenstadttii ; DNA ; Russian sturgeon ; Species differentiation ; Molecular Marker ; SNP
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    A survey on health status of marine fish in Bandar-e-Imam station (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25189 | 18721 | 2018-09-03 17:16:20 | 25189 | Iranian Fisheries Science Research Institute
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    Publication Date: 2021-07-16
    Description: Mariculture is one of the most important sub sector fisheries industry in Asia-pacific region. There are over 40 marine fish species commonly cultured, such as groupers (Epinephlus spp.), snappers (Lutjanus spp.) and Asian sea bass (Lattes calcarifer). But this industry in Southeast Asia experienced serious disease problem since the late 1980s. Khouzestan province has a coastal line about 200 km with many Creek and suitable area for Mariculture. Marine fish culture in Khouzestan province in floating net cages was successfully initiated in Ghazaleh Creek following development of Epinephlus coioides artificial seed production in the 1372. This study has been conducted since 1384 to 1387 in Bandar-e-Imam station. The aim of this research project was to determine the health management status in cage and hatchery, identification of marine fish pathogens (Bacteria, Fungi and parasite), examination of heavy metal in cages sediment and test the physico chemical factors of water in cages and hatchery. Different parts of broodstocks body and fingerlings including intestine, gills and body surface were examined. In this study, 18 Genus and species of bacteria such as Vibrio alginolyticus, Vibrio anguillarum, Vibrio splendidus, Vibrio vulnificus, Plesiomonas shigelloides, Aeromonas hydrophila, Aeromonas caviae, Pseudomonas sp. were diagnosed. Also 7 Genus and species of fungi such as: Aspergillus Niger, Aspergillus flavus, Aspergillus fumigatus, Penicillium sp. And Fusarium sp. Were isolated. In this survey following of disease appearance parasites such as; protozoans Amyloodinium sp. And Trichodina sp. In E.coioides and Acanthopagrus latus and Sparidentex hasta, monogean such as Benedenia sp. In E.coioides and S. hasta, isopoda probably Nerocila sp. In nasal cavity of E.coioides and copepods such as: Caligus sp. And Lernanthropus sp. In A.latus and S.hasta were identified. In this study, microorganisms (bacteria, fungi and parasites) isolated from three different marine fishes species, were reported for the first time in Iran. The range of the physico-chemical parameters of water in cages were: DO (5.42-10.24 ppm), BOD5 (1.51-10.24 ppm), No_2 (0.0197-0.89 ppm), No_3 (3.53-11.93 ppm), Po_4 (0.965-6.05 ppm), turbidity (4-58 NTU) and ammonia (0.0008-0.03 ppm). According to the results parameters such as nitrate, nitrite and turbidity were found more than standard levels. Heavy metals: Ni and Pb relatively high observed.
    Keywords: Biology ; Iran ; Khouzestan province ; Bandar-e-imam ; Mariculture ; Fisheries ; Species ; Epinephlus spp. ; Lutjanus spp. ; Lattes calcarifer ; Bacteria ; Fungi ; Parasite ; Aspergillus niger ; Aspergillus flavus ; Aspergillus fumigatus ; Penicillium sp. ; Fusarium sp. ; Vibrio alginolyticus ; Vibrio anguillarum ; Vibrio splendidus ; Vibrio vulnificus ; Plesiomonas shigelloides ; Aeromonas hydrophila ; Aeromonas caviae ; Pseudomonas sp. ; Grouper ; Snapper ; Sea bass
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    Study on Mahshahr creeks (north of Persian Gulf) as protected area (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25190 | 18721 | 2018-09-04 08:42:55 | 25190 | Iranian Fisheries Science Research Institute
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    Publication Date: 2021-07-16
    Description: In recent years MPAs (Marine Protected Areas) have been known as a flexible tool to improve fishery management as well as to preserve biodiversity in valuable coastal waters habitats. This study was conducted to selecting the sensitive and high potential area that are impacted by several environmental stress and associated habitats are being damaged in Mahshahr creeks in Northwest of Persian Gulf. Study was done in eight creeks from October 2005 to September 2006. Different biotic parameters such as phytoplanktons, zooplankton, macro zooplankton, benthic animals and fishes (trawled species) communities and also physico-chemical parameters and sediments heavy metals were investigated. Different parameters were sampled monthly or seasonal from each creek. Water samples with bottle sampler and sediment were collected by Peterson grab. Several ecological and biological indices based on heavy metals and benthic communities were used. Concentrations of heavy metals were measured by using voltammetric plarography method (Methrom 797). The range and mean concentrations obtained in mg/kg were 35.16-15.03 (27.01) for Cu, 171.41-65.57 (102.672) for Ni, 20.06-4.63 (13.22) for Co, 0.78-0.093 (0.22) for Hg, 379-65.07 (113.7) for Zn, 1.00-0.27 (0.559) for Cd and 29.72-7.09 (14.66) for Pb. To evaluate the levels of sediment contaminations, the background values of the different heavy metals were calculated and contamination factor for each metals and degree of contamination for each creek determined as well. Measured concentrations were compared with International standards. Ultimately the heavy metals contamination factors (Cf) can be arranged as follows: Hg〉 Zn〉 Cu≥ Ni〉 Pb≥ Co 〉 Cd and according to contamination degree (Cd), different creeks can be arranged as follows too: Ghannam〉 Ahmady≥ Zangy〉 Doragh≥ Darvish〉 ghazaleh〉 Patil〉 Bihad Regarding the results some elements such as Hg, Zn and Ni, are at risk level and all of the studied creeks are classified in moderate degree of pollution except Ghannam showing considerable degree of pollution. The benthic invertebrates are a well-established target in evaluations of environmental quality status. The AMBI (AZTI,s Marine Biotic Index) was developed to determine the impacts and the quality status in softbottom marine benthic communities. All creeks are characterized by muddy bottom. Macrobenthic animals, according to their sensitivity to an increasing stress gradient, classified in five ecological groups. In present study due to appearance of dominant species such as Capitella sp and nematodes (as opportunist species), diversity values was reduced. Two way ANOVAs showed only seasonal significant differences in mean abundance (P〈0.05, f=5.712, df: 3,21) and Richness index values (p〈0.05, f= 4.975, df=3,21), while all of creeks showed similar biological characters based on benthic communities. According to annual, mean of AMBI (BC) all of creeks classified in ecological group III with slightly pollution, except Darvish that was placed in unpolluted category. In general, according to AMBI and BI values, The most creeks are classified in unpolluted (34%) and slightly pollution (34%) categories except Zangy, Doragh and Patil in summer and also Zangy and Bihad in winter that showed moderate to heavily pollution (32%). The results of chemical quality of sediments, Cf values, Cd values, AMBI Index and water quality and risk Indices have confirmed each other. In general, the Mahshahr creeks are classified in moderate to heavy pollution status. In addition, biological parameters of benthic communities and other biotic parameters have showndescending trend in ecological quality in all of the studied creeks. Communities. According to annual, mean of AMBI (BC) all of creeks classified in ecological group III with slightly pollution, except Darvish that was placed in unpolluted category. In general, according to AMBI and BI values, the most creeks are classified in unpolluted (34%) and slightly pollution (34%) categories except Zangy, Doragh and Patil in summer and also Zangy and Bihad in winter that showed moderate to heavily pollution (32%). The results of chemical quality of sediments, Cf values, Cd values, AMBI Index and water quality and risk Indices have confirmed each other. In general, the Mahshahr creeks are classified in moderate to heavy pollution status. In addition, biological parameters of benthic communities and other biotic parameters have showndescending trend in ecological quality in all of the studied creeks. We used of some criteria for evaluation of biotic potential or sensitivity and also to explain the ecological health level of studied creeks. Positive and negative criteria are classified in three level 1, 3 and 5 for low, moderate and high degree of conservation value respectively. According to gained points the creeks Darvish, Doragh and Ghazaleh in high level and creeks Ghannam , Zangy and ahmady in low level of conservation value were classified.
    Keywords: Biology ; Ecology ; Iran ; Persian Gulf ; Khuzestan Province ; Mahshahr creeks ; Bottom sediments ; Heavy metals ; Contamination factor ; AMBI Index ; Risk Index ; Biodiversity ; Species ; Samples ; Benthic ; ANOVA ; Pollution
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    The Study of biology (age, feeding and, reproduction of Rutilus rutilus caspicus in south coast of the Caspian Sea (Iranian waters) (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25569 | 18721 | 2018-10-06 17:07:25 | 25569 | Iranian Fisheries Science Research Institute
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    Publication Date: 2021-07-16
    Description: The Caspian Sea is an important source of water in terms of having valuable resources of sturgeon and bony fish is taken into consideration roach(Rutilus rutilus caspicus (L.)) is one of the most important commercial species in the southern coast of the Caspian Sea in Iran , the catch of this species has declined substantially in the last 10 years, The management and exploitation need of comprehensive review of its biology .This study as part of a comprehensive study of feeding , spawning and growth of this species.In this study, using samples caught in beach seine along the southern coast of the Caspian Sea coastal ( Iranian waters ) took place. The fork length and total weight ranged between 12.5 to29.5(cm) and 29 to293( grm),10.5 to23(cm) and17.2 to21(grm) in Golestan and Gilan Province respectively. The b value of the length-weight relationship ranged 3.02 to 3.25 and 3.28 to 3.75 for female and male, in Golestan and Gilan Province respectively. The age composition of the catch was from 1 to 4 year in both Province, there was one spawning peak and Fecundity variations were high and ranged 7260 to 231965 eggs. Average growth in length was described with the Von Bertalanffy growth model: L (t) = 30.94(1-exp (0.42(t-0.18) and L (t) = 20.49(1-exp (0.53(t-1). The percent of empty stomach and prey dominant evaluated during different seasons by specific formula. Result showed that gastropod, Polychaete worms and molluscs were dominated and specific food items respectively. Shrimp, fish, insects, zooplankton and clams were scare of prey.
    Keywords: Biology ; Iran ; Caspian Sea ; Rutilus rutilus caspicus ; Spawning ; Feeding ; Growth ; Length
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    Geographical distribution of commercial bony fishes in Iranian waters of the Caspian Sea (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25568 | 18721 | 2018-10-06 17:03:55 | 25568 | Iranian Fisheries Science Research Institute
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    Publication Date: 2021-07-16
    Description: The beach seines catch and effort data from 1996 to 2011 categorized in four periods and used in this research. Geographical coordinates of beach seines determined by portable GPS and distribution maps of important and commercial species prepared by catch per unit effort (CPUE). The concentration of beach seines in the western coast of Golestan province, Kiashahr area and eastern part of Anzali was more than another part. The daily effort in Kiashahr and Anzali area was very high, thus the fishing stress in these areas was more than another part of Iranian coastal waters of the Caspian Sea. The number of species in catch composition increased from east to west and the beach seines of Guilan province had total of commercial species, but the number of commercial species rarely was five species in Golestan province and especially in eastern coast. Relative frequency and distribution of Kuttum in the east Babolsar area and then between Sepidroud and Anzali lagoon were more than another part. The ISI index of Kuttum was high in all of the area except east coast of Golestan province. The main distribution of Mullets determined in the western coast of Golestan province and the Amirabad fishing area and in these areas, the ISI index of Mullets was high. The main distribution area of common carp determined in east coast of Golestan and the ISI index of common carp was very low in other parts. Density and distribution of Kolmeh were high in eastern and western coasts of Iranian waters of the Caspian Sea and the density of this species was very low in Mazandaran province. The density of Zander was very high in surrounding of Sepidroud River and Anzali lagoon. The ISI index of commercial species in Guilan province was more than other provinces except Kuttum, mullets and common carp.
    Keywords: Biology ; Ecology ; Iran ; Caspian Sea ; Golestan province ; Guilan province ; Mazandaran province ; Babolsar ; Anzali ; Kiashahr ; Bony fishes ; CPUE ; ISI index ; Distribution map ; Species ; Fishing ; Kuttum ; Mullets ; Common carp ; Density
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    An ecological investigating on controlling Mnemiopsis leidyi population activity 6: molecular test in identification of Mnemiopsis leidyi (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25214 | 18721 | 2018-09-06 05:58:33 | 25214 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: In this study population genetic structure of Mnemiopsis leidyi were examined by 200 samples from the Caspian Sea. Samples were collected from Guilan province (Astara region), Mazandaran province (Amir Abad region), Golestan province (Gomishan region) and north part of the Caspian Sea. 50 samples were collected from each region. DNA was extracted by phenol - chlorophorm method and its concentration was 50 to 100 nanogram. PCR was performed using 18s rRNA gene. The PCR products of samples were digested by 12 restriction endonuclease enzymes. The digested products accompanied with standard marker (50 bp lader ). In order to measure fragment size samples were run on a 6% vertical polyacrylamide gel. The fragments were visualized by silver staining of the polyacrylamide gel. In this study, Dra I and Alu I enzymes showed different digestion pattern, as each of these enzymes had two genotypes. Other enzymes had similar digestion pattern. RAPD method used by 19 random primers. Ten of nineteen primers showed polymorphism patterns. Statistical analysis of data was performed by Popgene software. In this study, the maximum of genetic variation was in north of the Caspian Sea. Also, the maximum of genetic distance was between north area and Golestan coasts (0.089) and the minimum of genetic distance was between Mazandaran and Guilan coasts (0.001). The UOGMA dendogram showed two clusters. The samples of Mazandaran , Guilan and Golestan coasts placed in one cluster and samples of north area in other cluster The genetic diversity was significantly different between samples of north area and Golestan coasts (p≤0.05). As result, there is a significant genetic divergence between some of samples. Therefore, two genetic group of Mnemiopsis leidyi were identified in the Caspian Sea.
    Keywords: Biology ; Iran ; Caspian Sea ; Guilan province ; Mazandaran province ; Golestan province ; RFLP ; RAPD ; Mnemiopsis leidyi ; Genetic variation ; Population ; Molecular Test ; Samples ; Enzymes ; Genotype
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    Using biotechnology and chemical approach extraction of chitin and conversion to chitosan from the cyst shells of Artemia urmiana (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25618 | 18721 | 2018-10-07 16:34:53 | 25618 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: Chitin and chitosan are 2 very important products of biopolymer that enjoy high consumption in industry, but their production sources are very limited. In this study, Artemia urmiana cyst shells were obtained from previously collected and stored ones in Iranian Artemia Research Center. 20 kg of Artemia urmiana cyst shells were sampled, cleaned, separated, dried and transferred to Iranian Artemia Research Center Laboratory to extract their Chitin and chitosan. Their chitin and chitosan initially were extracted using optimized common chemical methods. Their properties were compared to 2 other types of Chitin and chitosan obtained from crab and shrimp manufactured by Vietnam and China, respectively. To determine their quality, elemental analysis device, infrared spectrophotometry, x –ray radiography, determination of viscosity , molecular weight, crystallinity percent, color, de stylization measure, empirical and molecular formulas were made. The results showed that the percentage of chitin obtained from Artemia cyst Shells in Chemical method was 28 ± 3 % by weight and efficiency into chitosan (grade steel relief) in this method was 50± 5%. To optimize the extraction procedure and the removal of proteins of chitin by biological practices that were done by sodium hydroxide in the chemical method, it was replaced by the bacterium Bacillus subtilis. And in the bio- phase of chitosan de steelation fungus Aspergillus niger enzyme was replaced instead of sodium hydroxide at high temperatures. The results showed that chitin and chitosan can be extracted from Artemia cyst shell using biological method and their characteristics included as in chitin 49.6% C, 8.2 % N, 7.5 % H, and 34.5 %O. Also the same levels for chitosan were 44.4 %, 8.9, 7.2 and 39.5 %, respectively. Their other quality characteristics were included chitin average molecular weight 4.9×10^6 Dalton, crystallinity percentage of 36.4, viscosity at 20°C 31 centipoise and its color was gray to brown. In the biologic method, the average molecular weight of chitosan, crystallinity percentage, viscosity at 20°C, were 5.1×105 Dalton, 94.5, and 18 centipoises, respectively. Also, its color was pale brown. Chemical structure of extracted chitin and chitosan from the shell of Artemia urmiana cysts were C_7H_12NO_4 and C_6H_11 NO_4c, respectively. The comparison of chitin and chitosan obtained from each chemical and biological method revealed that replacing biological methods instead of chemical methods is possible in achieving these products at suitable condition and better quality. This can eliminate the use of chemicals damaging the environment such as sodium hydroxide and decrease environmental pollution.
    Keywords: Biology ; Chemistry ; Iran ; Artemia urmiana cyst shell ; Chitin ; Chitosan ; Chemical ; Biological methods ; Crab shell ; Shrimp shell ; Biotechnology
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    Determining of DNA-barcoding of 6 – 8 species by partial sequencing of mtDNA (CO1) using molecular method (PCR-Sequencing) (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25619 | 18721 | 2018-10-07 17:03:03 | 25619 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: Barcodes are short segments of DNA that can be used to uniquely identify an unknown specimen to species, particularly when diagnostic morphological features are absent. These sequences could offer a new forensic tool in plant and animal Conservation-especially for endangered species. It was proved that a small fragment of mitochondrial DNA from the 5′-end of cytochrome c oxidase subunit 1 (COI) gene as a reliable, quick and costeffective identification system for most Crustacea like shrimp. Take a look in DNA barcoding website show that there is a little data about Iranian shrimps which live in Persian Gulf and Oman Sea. In this Study six species of shrimp: Fenoro penaeus indicus, Fenoro penaeus merguensis, penaeus semisulcatus, Metapenaeus affinis, Marsupenaeus japonicas, Fenoro penaeus penicillatus were collected from different stations in Persian Gulf and Oman Sea. All materials were preserved in 70% ethanol and were shipped to the laboratory for taxonomic studies. After identification, the total DNA was extracted; COI gene was first amplified and then sequenced for each species. Finally the collected data were analyzed with the specific phylogenetic software. The results were amazing and the interesting part was that analytical methods for showing species relationship suggested that Fenoro penaeus penicillatus is closer to Marsupenaeus gnus than penaeus gnus. This finding needs more investigation to be proved. We suggest a workflow for DNA barcoding, including database generation and management, which will ultimately be necessary if we are to succeed to join universal DNA barcode for Crustacea.
    Keywords: Biology ; Iran ; Persian Gulf ; Oman Sea ; DNA ; DNA barcoding ; Species ; mtDNA ; CO1 ; Molecular method ; PCR ; Specimens ; Morphological ; Cytochrome ; Mitochondrial DNA ; Shrimp ; Fenoro penaeus indicus ; Fenoro penaeus merguensis ; Penaeus Semisulcatus ; Metapenaeus affinis ; Marsupenaeus japonicas ; Fenoro penaeus penicillatus
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    The study of feeding, reproduction and biological parameters of kilka fishes in the Iranian waters of the Caspian Sea (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25622 | 18721 | 2018-10-08 05:50:41 | 25622 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: The overfishing and changing environmental following the introduction of the comb jelly Mnemiopsis leidyi in the Caspian Sea, the population structure has a strong influence on kilka fishes in the Caspian Sea and therefore to in this investigation which had been done in commercial catch regions (where discharged theirs catch) in three ports Babolsar, Amirabad (in mazandaran) and Anzali (in Guilan), stimated catch and catch per unit effort, the age structur of catch, length- weight relationship, von Bertalanffy growth parameters, condition factor, sex ratios, maturity stags, spawning and feeding. The result shown that catch of kilka in Iranian coastal in 2012 decreased from 24080 ton to 22696 ton in 2013. But CPUE increased was 2.7 ton (Vessel ×Night) and there was no significant changes. Common kilka was the predominant all months of the year, 98.1 and 98.9 percent in 2012 and 2013 respectively. The mean length was 104.4±10.5 and 101.6±11.2 at the same time and range length 92/ 5 – 117/5 mm were the dominant population(about 75%). Relative abundance of fish less than 77.5 mm and more than 127.5 mm is very low. Age abundance during this period have not been substantially changed and always fishes with 3 and 4 year olds had the highest frequency73.6 and 73.5 percent respectively. The parameters of the Von Bertalanffy growth curve were (8.141) 048.1 for common kilka. The instantaneous coefficient of natural mortality (M) was 0.506 yr-1. The instantaneous coefficient of fihing mortality and total mortality were 0.694 yr-1 and 1.2 yr^-1 , respectively. The exploitation rate of common kilka varied during 2012-2013 between 0.41-0.50. The mean condition factor 1.41±0.14 (n=5801) and 1.38±0.16 (n=6754) at the same time respectively. According to statistical analysis Anova oneway were a significant difference between condition factor at the same time . Main prey common kilka was Acartia tonsa accounting for over 80%. It seems Common kilka due to a decrease in the frequency of other zooplankton species depend more than ever on Acartia tonsa and this species is probably a concentration of prey for Common kilka.
    Keywords: Biology ; Fisheries ; Iran ; Caspian Sea ; Mazandaran Province ; Guilan Province ; Anzali ; Babolsar ; Kilka fishes ; Age ; Growth parameters ; Condition factor ; Exploitation rate ; Feeding ; Reproduction ; Overfishing ; Comb jelly ; Mnemiopsis leidyi ; Population ; Sex ratios ; Maturity ; Spawning ; Mortality ; ANOVA ; Acartia tonsa
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    Identification of qanats in Rafsanjan, Sirjan and Ravar cities for fish culture (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25229 | 18721 | 2018-09-06 06:14:35 | 25229 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: Study and recognition of the Quanat water of Rafsanjan, Sirjan and Ravar cities has been beginning since the November of 2004. Among 228 Quanat chains were studied in these cities, 165 quanat chains had a discharge more than 10 liter per second (L/Se) which were sampled. In this research oxygen, pH, discharge, water temperature and air temperature were measured in two times and in the local place. Height from the sea level, longitude and latitude were measured (by GPS Machine) in one time and in the local place and other physical and chemical factors including No_2, No_3, Co_2, total hardness, NH_3 and So_4 were measured one time in the laboratory. In this manner, the condition of connection ways of considered Quanat with city was studied. With examination on the Quanat water in above said cities, all of Quant was within desired extents for aquaculture activities. Moreover in some of them, water temperature was higher than 20 degree centigrade that with some changes and in specific months can be used in aquaculture.
    Keywords: Biology ; Iran ; Rafsanjan ; Sirjan ; Ravar ; Fish ; Aquaculture ; Quant ; Water ; Oxygen ; pH ; Temperature ; No2 ; No3 ; Co2 ; NH3
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    The survey statistical and biological of sturgeon in the southern Caspian Sea (Mazandaran waters) (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25627 | 18721 | 2018-10-07 16:48:29 | 25627 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: This study have been conducted entitle biological and statistical sturgeon in the southern Caspian Sea (Mazandaran waters)” from 2009 to 2013. Sampling was manthly. Overal, 1859 specimens of different species of sturgeon was caught including Acipenserpersicus (69%), A. stellatus (19%), Husohuso (6%), A. nudiventris (4%) and A. guldenstaedtii (2%). Totally, the meat and caviar of five species were found 53263.6 kg and 5633 kg respectively and caviar to meat ratio was 10.6%. The results show that ration of meat and caviar whole species reduced from 2009 to 2012 in which the meat and caviar of A. persicus was declined from 12146 to 4465 kg in meat and caviar from 1358 to 487 kg were extremely reduced respectively. The CPUE (catch per unit effort) of sturgeon has fluctuated from 2009 to 2012. Totally, the CPUE of A. persicus was decreased from 0.150 (2009) to 0.130 (2012) kg boat per day, A. stellatue from 0.009 (2009) to 0.021 (2012) kg boat/day, A. guldenstaedtii from 0.002 (2009) to 0.003 (2012) kg boat/day, A. nudiventris from 0.027 (2009) to 0.001 (2012) kg boat/day and H. huso from 0.123 (2009) to 0.018 (2012) kg boat /day. 1061 specimens of fish has been caviar including A. persicus with 69%, A. stellatus (18.1%), H. huso (5.5%), A. guldenstaedtii (2.7%). The frequency of caviar categorize was included 1 , 2, 3 and massive with 49.6%, 38%), 10.6% and 1.9%, respectively. The highest of meat and caviar belong to A. persicus with 31414 kg and 3515.7 kg, respectively were found and the lowest was 841kg and 105.9 kg pertain to A. guldenstaedtii. The results show that 65.9% of sturgeon was caught by legal catch (landing) and 34.1% by beach seine remained. 391 individuals was age determined that the minimum and maximum age was 9 and 41 year comprised to H.huso and A. stellatus, respectively. A. persicus and A. stellatus were majority caught compare to other species. A. persicus has the highest frequency in 14-15 year age groups with 50% and 57% in 2009 and 2011, respectively and 15-16 year age group with 41% and 56% in 2010 and 2012, respectively. The results show that mean of fork length, body weight, caviar weight of A. persicus was declined because the FL and weight average (±SD) obtained from 152.4±16.7cm and 25.8±9.2 kg in 2009 to 146.5± 18.7cm and 22.1±9.2kg in 2012, respectively. In contrast, the average (±SD) FL and weight of H. huso was increased from 218.8±41.1cm and 137.3±96.6kg in 2009 to 231.3±45.2cm in FL and 146.2±78.5kg body weight in 2012, respectively. Consequently, the results show that stocks of sturgeon in the Caspian Sea has a trend declined because of some species in IUCN categorize list was Endangered in 2006 but at this moment lie in Critically Endangered list of IUCN categorize were down which could be a serious alarm for the valuable sturgeon fish in the Caspian Sea. Therefore, recommendation that trade catch of sturgeon in the Caspian Sea must be forbidden and continue legal catch for spawner fish that needede to artificial propagation only.
    Keywords: Biology ; Iran ; Caspian Sea ; Biology ; Sturgeons ; A. persicus ; A. stellatus ; A. guldenstaedtii ; A. nudiventris ; H. huso ; CPUE
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    Genetic national plan study in order to shrimp breeding and developing of shrimp culture technology (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25256 | 18721 | 2018-09-07 07:21:26 | 25256 | Iranian Fisheries Science Research Institute
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    Publication Date: 2021-07-16
    Description: Sampling was done using 90 post larvae which were produced by reproduction of some broodstock of Penaeus indicus in one day and reared in the same situation for 4 month. Samples were classified in 3 group high growth, medium and low (according to their weight and length). Genomic DNA was extracted from a 1cm^2 piece of muscle using the phenol-chloroform method. The polymerase chain reaction (PCR) was done using 21 RAPD loci. And PCR products were separated on 3% Agarose gels. From 21 studied loci, 12 produced polymorphic bands. The most polymorphic band produced using OPAQ 9 and the least by OPAQ 7. According to Nei 1972, the highest distance (0.457) was between low growth group and medium and the lowest (0.091) between high growth group and medium, therefore the highest identity (0.912) was between high growth group and medium and the lowest (0.633) between low growth group and medium. Consensus neighbour-joining tree using Nei (1972 and 1978) resulted in two clades, the first including high and medium growth groups and the second low growth group, it appears that low growth group are depended on separated population of the two others. With considering of mean weight of F1(16.25±1.5), mean weight of 15 ±1.2 and mean weight of parent 31.6, response to selection (R) and heritability for growth in this species were estimated 1.2±0.2 and 0.07±0.01 respectively. In another part of this study Sequencing of specific bands and primer design were done and examining of them on the same age specimens is necessary in following.
    Keywords: Biology ; Iran ; Penaeus indicus ; High growth ; RAPD marker ; Genetic ; Shrimp ; Breeding ; Culture ; Sampling ; Broodstock ; Phenol-chloroform methods ; Population ; Species ; Specimens
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    Broodstock management, reproduction, cryopreservation in salmonid, genetic management and selective breeding in responsible aquaculture (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25651 | 18721 | 2018-10-14 02:48:20 | 25651 | Iranian Fisheries Science Research Institute
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    Publication Date: 2021-07-16
    Description: This study was conducted to codify the guideline and indexes of broodstock management in salmonid fish and cryopreservation, selective breeding and sex reversal in hatchery to attain responsible aquaculture development. Cryopreservation includes of sperm and egg in term of economic is important in aquaculture. In this report mentioned the type and name of material. All female and sex reversal fish are produced by steroid hormone which mentioned in this report. Selective breeding include individual selection and family selection which could be used for genetic improvement of fish.
    Keywords: Aquaculture ; Biology ; Management ; Iran ; Broodstock ; Reproduction ; Cryopreservation ; Genetic ; Breeding ; Aquaculture ; Salmonid fish ; Sex reversal ; Hatchery ; Sperm ; Egg ; Female ; Steroid hormones
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    Extraction‚ purification, identification and amount verification of steroids in Sargassum glaucescens and Padina boergesni algae in Oman Sea (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25642 | 18721 | 2018-10-14 02:40:17 | 25642 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: Padina boergesenii is one of the most abundant brown algae distributed in the north of Persian Gulf and Oman Sea. In this study after sampling and preparation of Padina boergesenii by Chroform-Etanol (3-1) solvent and by Methanol has been extract. Separation and purification of the compounds was carried out using thin layer, general and inverse column chromatography, Cephadex and high-performance liquid chromatography (HPLC). Structural elucidation of the constituents was based on the data obtained from H-NMR, 13C-NMR, HSQC, HMBC, DEPT and Cephadex LH-20. The steroids compounds separated from above alga were identified as 22dehydrocholesterol (1), cholesterol (2), fucosterol (3), β-sitosterol (4), stigmasterol (5), ostreasterol (6) and two epimer of hyroxyestrol(7), based on their spectral data and from comparison with those previously reported in the literature.
    Keywords: Biology ; Chemistry ; Iran ; Oman Sea ; Persian Gulf ; Brown Algae ; Padina boergesenii ; Steroids compounds ; Extraction ; Purification ; Identification ; Amount verification ; Sargassum glaucescens ; Algae ; Abundant ; Sampling ; Chromatography ; Cephadex ; Dehydrocholesterol ; Cholesterol ; Fucosterol ; β-sitosterol ; Stigmasterol ; Ostreasterol
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    Trout farms and other human activities effects on Cheshmehkileh river ecosystem in Tonekabon (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25792 | 18721 | 2018-10-13 08:54:26 | 25792 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: Cheshmehkileh River and adjacent mountainous streams, play a strategic role as a historical axis for anthropogenic civilization, human welfare also habitat and migration pathway of commercial – biologic valuable fishes e.g. Caspian trout, Caspian kuttum, members of Cyprinidae family in south Caspian Sea drainage. Treats such as overfishing of Caspian trout and Red spotted trout stocks in mountainous headwaters, barriers construction and manipulations those are out of river carrying capacity developed by human activities, affected normal function of river as well. Sand mining big factories establishment next to the river, legal and illegal trade of river sediments, direct entry of Tonekabon landfill leakage into the river, development of Rainbow trout farms since 3 decades and huge effluents into the river containing dead fish and types of solids, escapement of cultured Rainbow trouts into the river, … are major minimum factors which needs basic information for integrating inclusively drainage management system. Cheshmehkileh River contains Headwaters of Dohezar (Daryasar & Nusha), Sehezar and Valamroud rivers during 13 monthly sampling phases between September 2009 and October 2010 based on macrozoobenthoses investigations by EPT, EPT/C EPA protocols, measurements of nominated physic-chemical and microbiologic parameters. Probability of Rainbow trouts escapement and invasion, existence, nutrition in Cheshmehkileh environment indeed investigated. Data analysis explained significant differences (P〈0.05) between groups of measured parameters in different sampling stations. Dendogram of clustered analysis based on consolidation of major biologic/ physic-chemical and microbiologic parameters, separated stations No. 1, 3, 2, 4 in one group and remained classified in different groups. Station 8 and 9 similarly separated which expressed general similarities according to Sehezar river environment which were differs in comparison with other stations. Station 11 separated according to its natural quality of water and environment. Similarities between station 10 to Sehezar river stations 8 and 9 expressed general influence of Sehezar River more than Dohezar River in Cheshmehkileh condition especially in station No. 10. High scores of EPT and EPT/C indices in upstream stations 1, 3 and 8 also low score of indices in stations 7, 13 and 6 expressed levels of environment quality between these groups of stations. Maximum average biomass of macroinvertebrates belongs to Trichoptera order in Cheshmehkileh River. Significant decrease of biomass in stations 11, 12 and 13 in comparison with other stations stated environment degradation in mentioned stations relevant to excessive sand mining as well. Pollution resistant groups of invertebrates significantly increased in downstreams against upstream stations. Also disappearing of Plecoptera order in station No. 7, 9, 10 and 13 stated low quality of environment in comparison with upstream stations. Confirmation of effects quality and quantity for point and non-point sources of imported pollutants require specific management considerations in order to present exploitations, pollutants control and emergencies for river monitoring in forthcoming years.
    Keywords: Aquaculture ; Management ; Iran ; Tonekabon ; Cheshmehkileh ; River ; Pollution ; Aquaculture ; EPTC ; Assessment ; Macroinvertebrates ; Chemistry ; Microbiology
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    Study of benthic macro invertebrates in the Anzali lagoon (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25822 | 18721 | 2018-10-13 10:12:48 | 25822 | Iranian Fisheries Science Research Institute
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    Publication Date: 2021-07-16
    Description: The Anzali wetland (37.28N – 49.25E) with less than 100 km2 surface area is located in the southwestern shores of the Caspian Sea in the Guilan province. The benthic macro-invertebrates were studied as a part of a main project titled study of aquatic communities variation in the Anzali wetland. The sampling was performed at the 10 stations with using a Van-Veen grab during 2014-2015. The results showed, 14 macro-invertebrates taxa were identified as Chironomidae (Insecta, Diptera) and Tubificidae (Annelida, Oligochaeta), they were dominated in the wetland. The maximum and minimum densities of macro-invertebrates were observed with 609±1119 and 93.32±27.92 n/m^2 respectively at the stations 5 and 1. The silt-clay constitute more than 85 percentage of the wetland sediments with maximum of 93.2±27.92 percentage at the 2 station and minimum 72.21±27.92 at the 5 station. Kruskal Wallis non parametric test (sig. ≤0.05), revealed significant differences for all studied factors at stations while of %tom and grain size had no significant variation. The CCA analysis revealed no accordance of total organic matter (TOM ) and silt- clay percentage vectors with Tubificidae and total benthic frequencies, while Chironomidae frequency is in accordance. Intensifying eutrification process in the Anzali wetland has affected its biota as the benthic fauna are almost limited in to most tolerant taxa which reflect the day after day increasing pollution the Anzali wetland.
    Keywords: Biology ; Ecology ; Iran ; Caspian Sea ; Guilan Province ; Anzali wetland ; Macroinvertebrates ; Eutrification ; Aquatic ; Tubificidae ; Chironomidae ; Insecta ; Diptera ; Annelida ; Oligochaeta ; Benthic fauna
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    Investigation of chromosome and ploidy levels of rainbow trout produced from imported eyed eggs (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25825 | 18721 | 2018-10-13 10:43:05 | 25825 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: Rainbow trout is the main cultural species of coldwater fishes in iran. Often, aquaculturists intend to breeding in order to production of lines with higher growth rate potential and disease resistant. Nevertheless in the country, no trout breeding programs, has been performed yet and most of the farms focused on the cultivation of the first (unbred) race. While European countries progressed in trout breeding techniques and production lines with higher growth through genetic manipulation (chromosomal number and type changes of fish) and/or selection and their fish products derived from this technology, including eyed eggs and so on have sold to other regions of the world (eg: Iran). In this study, some biological parameters including survival, growth, feed conversion ratio (FCR.) and chromosomal number of two juvenile groups from imported( group 1) and native(group 2) eyed fish eggs were compared. For chromosomal investigation, blood smear test and flow cytometry were performed. sults showed a significant difference (P≤5%) in growth rate of native fishes and French group Native fish feed conversion ratio (0.9) was significantly difference (P≤5%) from that of French fishes (1.15). Chromosomal analysis showed no difference in chromosome number in treatments and two fish groups were 2n chromosome. Based on the results, the fishes of group 1 had faster grow potential and gain weight in less time than that of group 2 and this has been achieved to go through the process of selection and feminization without any change in number of ploidy. Whereas the ability of native fishes in food efficiency ( lower FCR.) was better. However, the reduction of rearing period is the benefit and preference of cultivation of imported or origionally foreign.
    Keywords: Aquaculture ; Biology ; Iran ; Imported eyed egg ; Native fish ; Ploidy level ; Growth ; Rainbow trout ; Chromosome ; Species ; Breeding ; FCR
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    Induction of population triploid-interploid in rainbow trout (Oncorhynchus mikiss) using by indirect (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25827 | 18721 | 2018-10-13 10:47:16 | 25827 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: Induced polyploidy is a suitable tool for producing sterile fish which made commercial benefits in the aquaculture industry. This study carried out in order to produce triploid-interploid population via mating tetraploid female with diploid male rainbow trout. Heat shock was used for making tetraploid population and the best temperature and induction time were examined. Result showed that highest mortality from 1 day after fertilization to emerging were in groups 6 of embryos (40.1%) and the lowest were in groups 3 (33 %). Flowcytometry results showed that some fish were polyploidy. Comparative analyze of genome levels in tetraploid fish to control fish (diploid) and hen as standard indicator, confirmed tetraploid fishes in this study. In conclusion we can state that heat shock induction for 7 minutes at 65 hour –degree after fertilization in 28ºC is optimum temperature for inducting tetraploid rainbow trout.
    Keywords: Aquaculture ; Biology ; Iran ; Sexual development ; Triploid interploid ; Tetraploidy ; Heat shock ; Flow cytometry ; Rainbow trout
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    A survey on biodiversity of Cyprinid fishes of Iran (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25832 | 18721 | 2018-10-13 10:50:13 | 25832 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: A survey on Biodiversity of Cyprinidae family in Iran Cyprinidae family is the biggest and most important fish families with 367 Genera and 3006 species in the world. Members of this family is the most important freshwater species are present in a variety of freshwater ecosystems. Some of them can also live in brackish waters. Iran has about 93 species in the family Cyprinidae and consist half of the fishes in inland waters. In the past two decades many changes occurred in aquatic ecosystems, Fish habitat conditions changed and a lot of them are affected and some species are endangered or put under pressure. Restricted fish migration, Some Exotic species and have been entered in water resources and have narrowed arena on continued existence of native species. On the other hand, climate change and drought on water resources aggravate existing conditions. It is necessary effects of these changes in the family Cyprinidae be reviewed and analyzed.
    Keywords: Biology ; Ecology ; Iran ; Cyprinidae ; Biodiversity ; Water resources ; Climate Changes
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    Survey of potential adaptation (ion- osmotic) rainbow trout (Oncorhynchus mykiss) fingerling with Caspian Sea water (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25833 | 18721 | 2018-10-13 10:28:58 | 25833 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: This study aimed to determine domain the adaptability of rainbow trout(Oncorhynchus mykiss) fingerlings in fresh water up to 20 per thousand (grams per liter) for providing facilities for growing this valuable species in the aquatic environment with salinity unconventional been completed. For this purpose the biochemical, bloody and physiologic parameters rainbow trout were studied to determine the adjustment range .Fingerlings fishes from cold water fish farm in the province Mazandran were prepared and for experiments were transferred to the Ecological Institute of Caspian Sea . Fingerlings with an average weight 31.56 ± 0. 07 SE g and average fork length 13.80 ± 0.15 SE cm, in 3 treatments in water with salinities (fresh, 13 and 20 grams per thousand) with a density of 15 numbers in polyethylene to 300-liter tank containing the 250 liters of water testing were introduced. Fresh water from Tajan rivers and water psu13 from the water Caspian Sea and water psu20 by mixing water the Caspian Sea and Sea salt was prepared . The daily amount to 50 percent of the of water tankss been replaced .During the experimental period was for 7 days and were not fed during the experiment.The water parameters was measured during the experiment included 6 ppm dissolved oxygen, pH equal to 8.2 and temperature 15.5 ° C . In the experimental period were not observed Losses in the experimental groups . The results showed that fish gill and kidney introduced in different salinities by making appropriate changes in chloride cells in the gills through increasing the number and the volume of these cells at the base of secondary blades and tubules in the kidney tubules to create greater interior space, are adapted to By changing salinity. Relatively parameters osmolarity, sodium, chloride, magnesium, cortisol, calcium, hematocrit, hemoglobin, number of red blood and white cells in water saltier than freshwater environment was higher (0.05〈 p, Duncan). Changes in hematological and blood plasma ionic parameters and vital organs Fingerlings indicates a willingness adaptability and the ability physiological adaptation fingerling was consistent with changes to environmental salinity brackish water .So, the factors measured with increasing salinity the uptrend that the range of variation for the osmolarite 449-281 mOsmol kg, for sodium, chloride, magnesium, cortisol, respectively, 211- 151, 165121, 3/3 7/0, 87. 53 mmol and the calcium 22-13 mg per dL. The measured values for hematocrit 32.2- 38.8%, hemoglobin 6.2 - 8.6 g per deciliter and the red and white blood cells, was respectively, 1.2-1.7×106 and the 15.6 -18.9×103.
    Keywords: Aquaculture ; Biology ; Iran ; Caspian Sea ; Adaptation ; Rainbow trout ; Gills ; Kidney ; Survey ; Oncorhynchus mykiss ; Fingerlings
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    A study on fishing status and some reproductive characteristics of Klunzinger’s mullet (Lize klunzingeri) in coastal waters of Khuzestan province (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25845 | 18721 | 2018-10-13 08:35:24 | 25845 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: Biological characteristics of Liza klunzingeri were studied in two coastal areas, Sajaphi and Bahrekan, of eastern Khuzestan during March to February 2007. Among total 1880 measured fish specimens, 947 specimens were analyzed. The mean value of Gonado-somatic Index (GSI) for the male and female fish were calculated as 0.96± 1.39 and 3.25 ± 3.26 respectively. The GSI value was highest in November and lowest in July. The mean value of condition factor (K) was 1.25± 0.14 in male and 1.21± 0.15 for female. The highest K value were observed in June and the lowest value in February. The lenght at first maturity regardless of sexuality, was found to be 14.5 cm and the time of spawning based on reproduction pattern were determined in Nov- Dec. The length-weight relationship were calculated as Y=0.024L^2.76 (n=226R2=0.72) for males, Y=0.011L^3.00 (n=444R2= 0.78) for females and Y=0.0208L^2.82 (n=670R2 =0.82) for total fishes and also it’s found significant in level length weight relationship in (P〈0.05). According to biological characteristics and referring to American fisheries society (AFS) indices and Fuzzy logic expert system, Lize klunzingeri is classified as low vulnerable species.
    Keywords: Biology ; Iran ; Khuzestan province ; Sajaphi ; Bahrekan ; Lize klunzinger ; Gonado-somatic Index ; GSI ; Condition factor ; Biological characteristics ; Female ; Male ; Specimens ; Fisheries
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    Thalassoma lunare (Linnaeus, 1758) (2021)
    Iranian Fisheries Science Research Institute
    In:  http://aquaticcommons.org/id/eprint/21097 | 17408 | 2017-04-27 06:20:06 | 21097 | Islamic Azad University, Science and Research Branch, Tehran
    Details
    Publication Date: 2021-07-14
    Description: Thalassoma lunare is also named the Moon Wrasse because of its yellow caudal fin shapes like crescent moon with long upper and lower lobes. It is an inhabitant of coral reefs and surrounding areas at depths from 1 to 20. T. lunare is the most abundant wrasse species in the Persian Gulf. This species can reach 16 cm in total length in Iran, Persian Gulf, Kish Island. Moon wrasses are active fish, said to be moving all day long. They are also territorial, nipping, chasing, and otherwise harassing fish that get in their way. Being diurnal, wrasses have strong vision, although they also have a decent sense of smell. At night, they rest in niches often under rocks or other such structures. If needed, a moon wrasse may dig out a space under a rock by repeatedly swimming through it until it fits without struggle. They are protogynous hermaphrodites, all starting off as females and changing to males, a process which, for the moon wrasse, takes only 10 days. Some moon wrasses live in groups consisted of a dominant male, and a "harem" of about a dozen other wrasses, some female and some male. The alpha male is more brightly colored, and at every low tide hour, changes from green to blue, and goes into a show of attacking and nipping all the other wrasses. This is his way of showing his dominance to the rest of the males and keeping the females in check. During breeding season and before high tide, the alpha male turns completely blue, gathers up every single female, and the spawning frenzy begins.
    Keywords: Biology ; Ecology ; Fisheries ; Thalassoma lunare
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    Megalomma vesiculosum (Montagu, 1815) (2021)
    Iranian Fisheries Science Research Institute
    In:  http://aquaticcommons.org/id/eprint/21105 | 17408 | 2017-04-27 07:28:58 | 21105 | Islamic Azad University, Science and Research Branch, Tehran
    Details
    Publication Date: 2021-07-14
    Description: Megalomma vesiculosum (Giant Feather Duster Worm) has reported for the first time from Persian Gulf (Iran, Kish Island). M. vesiculosum is a polychaete worm that reaches up to 12 cm in length. It has relatively few (about 50) tentacles, each with a large eyespot at the free end. It creates a long and tough tube, which is mostly encrusted untidily with large shell fragments and small stones. The tube protudes no more than 40-50 mm (in Iran, Kish Island) from coarse sand or muddy gravel at low water and below. The body and crown vary in color from yellowish to a reddish-purple brown and is usually spotted. The Giant Feather Duster Worm is a relative of the garden earthworm. It uses its colorful tentacles to filter the water for food, which includes phytoplankton and bacteria. M. vesiculosum requires a high density of phytoplankton and dissolved particulates to survive in a marine ecosystem. The worm generally buries its tube in the sand and the crown protrudes above to strain the water. If this worm sheds its tentacle crown, it is not getting enough food. It will usually regrow another, smaller than the previous. If this cycle continues, the worm will starve. Members of the class Polychaeta are mostly gonochoric (sexual). Females produce a pheromone attracting and signalling the males to shed sperm which in turn stimulates females to shed eggs, this behavior is known as swarming. Gametes are spawned through the metanephridia or body wall rupturing (termed as ‘epitoky’, wherein a pelagic, reproductive individual, ‘epitoke’, is formed from a benthic, non reproductive individual, ‘atoke’). After fertilization, most eggs become planktonic; although some are retained in the worm tubes or burrowed in jelly masses attached to the tubes (egg brooders). Eggs develop into trocophore larva, which later metamorph into juvenile stage (body lengthened), and later develop into adults.
    Keywords: Biology ; Fisheries ; Megalomma vesiculosum
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    Sabellastarte spectabilis (Grube, 1878) (2021)
    Iranian Fisheries Science Research Institute
    In:  http://aquaticcommons.org/id/eprint/21106 | 17408 | 2017-04-27 06:38:05 | 21106 | Islamic Azad University, Science and Research Branch, Tehran
    Details
    Publication Date: 2021-07-14
    Description: Sabellastarte spectabilis is commonly known as the feather duster worm, feather duster or fan worm. It has reported for the first time from Iranian waters (Kish Island) and finding in the intertidal and subtidal reefs. Especially common in sites where phytoplankton is abundant. The worm's body occupies a flexible mucus tube formed by adhesion of silt from the water column. Polychaetes, or marine bristle worms, have elongated bodies divided into many segments. Each segment may bear setae (bristles) and parapodia (paddle-like appendages). Some species live freely, either swimming, crawling or burrowing, and these are known as "errant". Others live permanently in tubes, either calcareous or parchment-like, and these are known as "sedentary". This large worm can reach 80 millimeters in length and 10–12 millimeters in width. It is buff in color with purple specks. It lives in a tough, leathery tube covered with fine mud. The tentacles are striped in dark and pale brown bands and bear neither stylodes nor eye spots. There are two long, slender palps and a four-lobed collar. Cilia on the tentacles cause currents in the water and organic particles are caught as they float past. They are channelled along mucus-filled grooves to the mouth. Larger non-food particles are used for building the tube. The tentacles are also used as gills for gas exchange. This worm can reproduce asexually by fragmentation, and can regenerate body parts after being damaged. Reproduction can also be by sexual means. Most worms are either male or female and the gametes mature in the coelom before being released into the water column. Some specimens, particularly larger ones, have both male and female gametes and a study concluded that this was consistent with sequential hermaphroditism. Fertilization is external, and after a short time in the plankton, the trochophore larvae settle out and grow into adult worms.
    Keywords: Biology ; Fisheries ; Sabellastarte spectabilis
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    Pseudoceros prudhoei (Newman & Cannon, 1994) (2021)
    Iranian Fisheries Science Research Institute
    In:  http://aquaticcommons.org/id/eprint/21107 | 17408 | 2017-04-27 06:39:06 | 21107 | Islamic Azad University, Science and Research Branch, Tehran
    Details
    Publication Date: 2021-07-14
    Description: Pseudoceros prudhoei is usually found on rocky or reef habitats, swimming in open waters or under coral rubble plates, where they find their prey, the ascidians. Maximum length is 5 cm in Persian Gulf (Iran, Kish Island). While some of the free-living flatworms tend to hide under rocks escaping from the sunlight, colorful polyclads usually demonstrate a very conspicuous behavior, swimming through the water column next to coral reefs. These animals actually do not need to avoid predators, because their bright color pattern works as a warning sign about their distastefulness and toxicity. None of the animals had a negative response to the presence of light. When the flashlight was turned on, they started swimming around and exploring the environment and none of the worms hid under the rocks searching for cover. In fact, the light didn’t seem to bother them at all, as some would swim toward it, swim back and settle down at any spot. P. prudhoei is not negatively phototactic and reinforce the function of aposematic coloration in pseudocerotids. P. prudhoei is hermaphrodites with both male and female reproductive systems functional at the same time, and reproduce by internal fertilization.
    Keywords: Biology ; Fisheries ; Pseudoceros prudhoei
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  • 85
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    Identification of native fish in Hamedan province (Gamaciyab) (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25079 | 18721 | 2018-08-22 06:43:41 | 25079 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: This study was carried out from 2001 to 2002 in Gamasyab River of Hamadan province of Iran in order to identification of indigenous species of this water resource. The main objective of this study was to fish identification for scientific purposes, geographical distribution pattern, preparation atlas of the fishes, introduction of commercial species and awareness on ecological situation of their natural habitats. Also providing necessary information for conservation and sustainable use of these valuable stocks and minimizing environmental impacts of unsecured utilization. Sampling were carried out by selecting 15 sampling stations through the river and fishing by electro fisher and cast net. Identification accomplished by valid identification keys in species level. Photography and slides provides and 10 pieces of each species tagged by unique codes for preservation in national museum. 50 morphometric and meristic characteristics studied for scientific identification.. Indigenous fishes belong to 14 species, 10 genus, 3 family and 2 order. Indeed 2 exotic species belong to Cyprinidae and Salmonidae families recognized. From these indigenous species, 11 belong to Cyprinidae family and only one species belong to Sisoridae family.
    Keywords: Biology ; Iran ; Hamadan ; Gamasyab River ; Indigenous species ; Identification ; Fish ; Sampling ; Morphometric ; Cyprinidae ; Salmonidae ; Sisoridae
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  • 86
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    Effect of artemia density on cyst yields of fertilized ponds (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25088 | 18721 | 2018-08-22 06:46:47 | 25088 | Iranian Fisheries Science Research Institute
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    Publication Date: 2021-07-16
    Description: One of the effective factors in cyst production on Artemia culture ponds is the number of oviparous females and density of biomass in view of adult's weight per liter of ponds water. In this study, the effect of oviparous female's abundance (Reproductive Females lit^-1) on daily cyst yields with using the ANOVA and correlation Analytical method were assayed. The result indicated that, with presence the small number of oviparous females (less than five Ind lit^-1) and Artemia density (between 0/1 to 0/2g/ lit) on culture ponds, the cyst yields at first sixty days culture period (160 Kg.dw/ha) were more than yields that harvested at three months later (47 Kg.dw/ha) and on the second three months of cultural period despite of presence the larger number of oviparous females (more than twenty Ind/lit) and presence the same Artemia population density, the daily cyst yields was declined.(Sig=0.000).
    Keywords: Biology ; Iran ; Artemia ; Density ; Cyst ; Fertilized pond ; Females ; Biomass ; Weight ; ANOVA
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    Comprehensive study on probability of controlling Caspian Sea invasive ctenophora (Mnemiopsis leidyi) (Activity 2: Investigation on Mnemiopsis leidyi diet in the Caspian Sea) (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25091 | 18721 | 2018-08-22 07:12:26 | 25091 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: Mnemiopsis leidyi is one the species of comb-jelly. It belongs to the Ctenophore phylum and Lobate order. It is a purely marine, free-swimming animal with a transparent jelly-like walnut-shaped body, which was transported from the Black Sea into Caspian possibly at the end of 1990s. This species is food rival of pelagic fish. It has been reported that the ctenophore caused the dramatic decrease of zooplankton and pelagic fish stock in the Black Sea. In this study, sampling on Mnemiopsis leidyi, zooplankton, phytoplankton was conducted from December 2003 to March 2005, from a total of 11 stations located along four transects (Anzali, Khazarabad, Tourkman and Gorgan Bay) by METU net in the Iranian coasts of the Caspian Sea. Clupeonella catch was done by light fishing with fishing vessel in Anzali region. The results showed that the biomass of M.leidyi had some fluctuation in different seasons and its maximum biomass was recorded in summer with a figure of 524.4±156.2 g.m^2 Tourkman region and the minimum biomass was observed in winter with a figure of 5.15±1.81 g.m^2 in Anzali region. Study of stomach of Mnemiopsis showed, that Acartia (belonged of Copepoda with 66 %), lamlibranchia (13 %) has the highest frequency and the lowest were Balanus nauplii, Rotatoria, Tintinnopsis and Podon polyphemoides. The maximum mean abundance of zooplankton was 29368±24318 n.m3 in winter (Anzali region) and the minimum was recorded 4170±5014 n.m3 in summer (Tourkman region). Copepoda was dominant zooplankton in the Iranian coasts of the Caspian Sea. Chrysophyta with 150000000±440000000 n.m3 and Euglenophyta with 260000±521000 n.m3 had the highest and the lowest frequency respectively in the Caspian Sea. The main foods of Clupeonella were Acartia with 80 %. The survey of stomach of Clupeonella showed that the feeding of these species was not good and the highest fullness index was recorded 220.95±314.67. These results showed, the main food item of Ctenophora and Clupeonella were Copepoda (Acartia). It seems, the impact of Mnemiopsis leidyi feeding has been the important factor in declining zooplankton populations, Clupeonella stocks, and also increasing of phytoplankton abundance.
    Keywords: Biology ; Iran ; Caspian Sea ; Gorgan Bay ; Bandar Tourkman ; Khazarabad ; Anzali ; Ctenophora ; Mnemiopsis leidyi ; Diet ; Species ; Phylum ; Pelagic fishes ; Sampling ; Zooplankton ; Phytoplankton ; Acartia ; Ctenophora ; Population ; Abundance
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    Population genetic structure of Neogobius caspius (Eichwald, 1831) in the east and central of the south Caspian Sea using microsatellite markers (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25258 | 18721 | 2018-09-07 07:37:38 | 25258 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: Neogobius caspius is a small benthic fish that is native to the Caspian Sea. The importance of this fish is because of it is role as a main food resource of the Sturgeon fish. The genetic diversity of N.caspius populations in the Caspian Sea was studied using microsatellite technique. In the study 95 Samples of Neogobius caspius from two regions (Torkman port and Chalus) in south Caspian Sea were collected. DNA was extracted using 12 pairs of microstellite primers polymerase chain Reaction (PCR) was conducted. DNA Bands were analyzed using uvdoct and GenAlEx software package. Out of 12 microsatellite primers, 11 loci were produced, in which 5 of them were polymorphic, 6 monomorph and one of them showed smear. Average of observed and expected hetrozygosity was 0.798 and 0/843 respectively. Significant genetic differences between 2 regions was observed (P〈0.01). Deviations from hardy- Weinberg equilibrium were in all cases. These results indicate that at least, 2 population of Neogobius caspius exist in the south Caspian Sea.
    Keywords: Biology ; Iran ; Caspian Sea ; Torkman port ; Chalus ; Microsatellite ; Genetic ; Population ; Neogobius caspius ; Benthic ; Native ; Sturgeon ; Diversity ; Samples ; PCR
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    Study on inheritance of microsatellite markers in hybrid of chalcaburnus chalcoides and vimba vimba persa in southern part of Caspian Sea (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25260 | 18721 | 2018-09-07 07:24:11 | 25260 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: In order to study the Inheritance of Microsatellite Markers in the hybrid of Chalcalburnus chalcoides and Vimba vimba persa in the Southern part of the Caspian Sea, hybridization between the species was carried out during spring (2009) in Shahid Ansari reproduction and culture workstation. 30 samples from the produced larva and also small piece of dorsal and pectoral fin of their parents were collected and stored in pure ethanol (96%) and transferred to the biotechnology of the Caspian Ecology Academy. DNA was extracted from fin samples of the parents, whilst the whole F1 progeny was used to isolate the DNA by Phenol-chloroform method. Quantity and quality of extracted DNA was determined using 1% Agarose electrophorus. DNA was used for PCR ampilification of 10 microsatellite loci. The amplifications were run on 6% Polyacrylamid electrophorus. The present study showed that 7 out of 10 markers were polymorphic and variated between the parents. Goodness of fit to the Mendelian inheritance ratio was determined by X2 analysis. 4 primers were segregrated according to Mendelian expectations at a significance level of P 0.05. Based on UPGMA dendrogram (Nei, 1978) two different clusters were obtained in which Chalcalburnus chalcoides and hybrid were in the same cluster but Vimba vimba persa was in the other. It seems that Vimba vimba persa is a joint ancestor for these two. High heterozygosity presence in parents and their F1 shows the high potential of genetic variety in Chalcalburnus chalcoides and Vimba vimba persa which from the aquaculture management and conservation view is important and considering the high genetic variety in their hybrid, the hybrid has the sufficient potential for race improvement.
    Keywords: Biology ; Iran ; Caspian Sea ; Chalcalburnus chalcoides ; Vimba vimba persa ; Hybrid ; Microsatellite ; Hybridization ; Culture ; Samples ; Larvae ; DNA ; Inheritance ratio ; Heterozygosity
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    Global population structure of the great sturgeon (Huso huso) in the southern part of the Caspian Sea with emphasis on the Golestan Province (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25261 | 18721 | 2018-09-07 07:21:13 | 25261 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-16
    Description: Report of the project entitled "determination of the global population structure of the great sturgeon (Huso huso) with emphasis on the Golestan Province" is in front of your attention. Outcome is the results of study on the samples collected from the total catch in the landing sites namely Bandar-e-Anzali, Babolsar, and Ashooradeh, in the three Northern provinces. 224 specimens were collected according to the sampling manual during the fishing seasons in 2005 and 2006. Three methods were applied in this study to find out the population structure of the great sturgeon in the southern Caspian Sea. These were as follows: Morpho-metric meristic Population dynamics Population genetics (microsatellite loci) Results indicate that the range of different age groups of the great sturgeon in the Golestan Province is larger than the other two provinces. Results show that the older age groups are found in the samples from the Golestan Province rather than the other two provinces. Results demonstrate that the sample size for the two methods (morpho-metric meristic and population dynamics) is not enough. In order to obtain precise results with less uncertainty one needs to collect more specimens. Therefore, according to the few number of the great sturgeon in the total sturgeon landing, it is recommended that researchers apply methods other than the two methods which are mentioned above in order to make sure that the results are most reliable. Population genetics methods including microsatellite loci are among the methods which could produce good results with minimum bias in this regard. Results indicate that there are two distinguishable populations of the great sturgeon (Huso huso) in the southern part of the Caspian Sea off the shores of the three Northern provinces. Results also show that these two populations are scattered in the two east end (Golestan Province) and west end (Guilan Province) of the southern Caspian Sea. The two populations have overlapped each other in the Mazandaran Province.
    Keywords: Biology ; Iran ; Caspian Sea ; Golestan Province ; Guilan Province ; Mazandaran Province ; Babolsar ; Bandar-e-Anzali ; Population ; Sturgeon ; Huso huso ; Sampling ; Morpho-metric ; Samples ; Meristic ; Genetic ; Microsatellite ; Specimens
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  • 91
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    Using of benthic indices and GIS maps to determination of biotic health of Khure- Mussa (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25267 | 18721 | 2018-09-07 08:20:55 | 25267 | Iranian Fisheries Science Research Institute
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    Publication Date: 2021-07-16
    Description: Without industrial and urban development and their effects on marine ecosystem, due to high biotic potential, Khure-Mussa would be one of the productive coastal areas. Because of sensitivity and vulnerability to environmental changes this area are classified in sensitive ecologic area. This study was conducted to evaluation ecological health status in Khure-Mussa in the Northwest of Persian Gulf by using benthic indices. Twenty creeks in Khure-Mussa area were set up for study and sampling in four seasons from winter 2008 to autumn 2009. Monthly water sampling for physico-chemical parameters was done by bottle sampler and seasonal samples of surface sediment were collected by Peterson grab sampler (0.125m^2) .At each station three samples for macrobenthic study and one sample for grain size analysis and organic matter determination were obtain. Totally, 187589 macrobenthic individual were collected and separated. Among identified groups, Polychaetes with total number108906, Crustacean with total number 46561, Bivalve with total number 14156 and seapen with total number 9841 were the dominant groups and were included 58, 25, 8 and 5 percentage of total number respectively. The highest abundance in the spring and the lowest abundance in the summer were observed. According to mean abundance, Somaily creek and Khure-mussa (3) station showed the highest and the lowest abundance respectively. Seapen is included more than 90 % of total biomass. The range of Shannon diversity index was (1.95-3.58) which the minimum and the maximum values were found in Shipping and Patil station respectively. Significance benthic biological parameters (abundance and richness) in different creeks explained the variation of benthic community structure in studied creeks. In addition, seasonal significant differences were found in these parameters due to seasonal changes in benthic animal s succession. The results of grain size analysis showed that the range of siltclay was (63.6-95.59). According to AMBI index values, all of the studied creeks are classified in slightly pollution level and disturbed condition except for Petrochemical station that placed in moderate pollution level. The BOPA index values in all stations showed more than threshold level (0.19) that means bad and weak ecological condition. The highest and the lowest ITI index values were observed in Oil exporting port station (64.92) and Ghazaleh creek (29.53) respectively. The others were grouped in 30-60 range that means moderate pollution level and disturbed ecological status. The values of ABC (Abundance Biomass Curve) that explained the relation between macrobenthic biomass and abundance, were calculated near zero from 0.1 to -0.1 in all studied creeks that show moderate condition for living animals. In general the studied creeks showed pollution potential and benthic biological parameters indicated downward trend in ecological quality and health status.
    Keywords: Biology ; Ecology ; Iran ; Persian Gulf ; Khure-Mussa ; Ecological health ; Benthic animals ; Biotic indices ; GIS ; Marine ; Ecosystem ; Sampling ; Macrobenthic ; AMBI ; BOPA ; Pollution ; Biomass ; Abundance ; Parameters
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  • 92
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    Identification and density determination of juvenile fishes in Khouzestan coastal waters (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25266 | 18721 | 2018-09-07 07:35:16 | 25266 | Iranian Fisheries Science Research Institute
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    Publication Date: 2021-07-16
    Description: Aquatic animals possess specific biological characteristics and lifecycle. Without knowing about their biology and complete lifecycle, planning about their conservation cannot be effective. Following the previous studies on fish larvae in Khuzestan coastal waters this study was done to determination catch composition and density of juvenile fishes in Khuzestan coastal waters during 2007 to 2008. Studied area included two main fisheries ground, Lifeh-Busafe in west and Bahrekan in east coasts. Monthly random sampling was carried out by using shrimp trawl net with Akhtar vessel. Juvenile fish's means the fishes that completed their larval cycle and are look like their parents but have not been matured yet. The catch mean, biomass, CPUA and the stock size of different species were estimated by using Swept Area Method. Totally 101485 caught fishes included 38 families and 63 species. The most abundant trawled fishes were Thryssa vitriostris Leiognathus bindus Ilisha melastoma Penahia macrophthalmus and Johnius belangerii .These five species contain about 80 %, the species Arius dussumieri and Cynoglossus arel 4.5% and 3.2 % respectively and the others 12% of total caught fishes. In the east coasts the species L. bindus I. melastoma T. vitriostris P. macrophthalmus and in the west coasts the species P. macrophthalmus T. vitriostris J. belangerii and I.melastoma were the most abundant. Among 63 identified fish species , juvenile fishes of 23 species were observed which contain 26.4 % of total caught fishes .the fishes Arius dussumieri and Acantopagrus latus 100%, Liza subviridis, Leiognathus lineolatus and Triacantuhus biaculeatus more than 80 % and Pomadasys stridens Lagocephalus inermis Saurida tumbil and Thryssa vitrirostris more than 50 % were observed as juvenile stage. The most abundant juvenile fishes were T. vitrirostris L. bindus and Arius dussumieri respectively. The maximum (1852 kg/km^2) and the minimum (165 kg/km^2) values of CPUA were estimated in west coasts in July and December respectively. The maximum (2677 kg/km^2) and the minimum (153 kg/km^2) values of CPUA were estimated in east coasts in June and August respectively. The biomass showed a distinct peak in June and July in east and west coasts respectively. The highest diversity index in east (2/22) and west (2.36) coasts were obtained in July. In present study the number of identified fishes is more than previous studies. Juvenile fishes spend their sensitive period of lifecycle in Khuzestan coastal waters. After growing in late spring, fish larvae enter to the juvenile stage and select this productive area as nursery ground. Increasing of juvenile fishes in July is accordance with their reproduction season in studied area. The east coasts are deeper than the west and there are some differences in hydrological characteristics due to discharging of the rivers Bahmanshir and Arvandrood in west coasts. The peaks of abundance in east and west coasts were observed with a clear time interval. The higher CPUA in east coasts can be caused due to gradual migration of juvenile fishes from west to east during cold season.
    Keywords: Aquaculture ; Biology ; Iran ; Persian Gulf ; Khuzestan coastal waters ; Bahrekan ; Bahmanshir River ; Arvandrood River ; Juvenile fishes ; Bottom trawl ; Catch composition ; Biomass ; Aquatic ; Larvae ; Density ; Sampling ; CPUA ; Species ; L. bindus ; I. melastoma ; T. vitriostris ; P. macrophthalmus ; J. belangerii ; Migration ; Coastal waters ; Identification
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  • 93
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    Reproduction biology of Astacus leptodactylus eichwaldi in the Iranian coastal water of the Caspian Sea (Bandar Anzali) (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25270 | 18721 | 2018-09-07 07:54:06 | 25270 | Iranian Fisheries Science Research Institute
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    Publication Date: 2021-07-16
    Description: Sampling of Astacus leptodactylusc were conducted in order to determination of biometrical and biological parameters suchas length, weight, sex ratio, fecundity and natural reproduction time. Two transect were selected at 49 34 and 49 36 geographical position on east Caspian Sea near to Anzali city. Metallic folding trap with Silurus glanis as attractive diet were used to catch Astacus leptodactylusc at each line the traps were set on depth of 35, 45, 55 and 65 (5 trap at each depth). Random sampling from each depth on tow lin for one year were conducted and the biometry performed on catched Astacus leptodactylusc where their sext uality and their ration were determined for eacd month , season and whole year. Absolute fecundity determined by cooking Astacus leptodactylusc , taking out the ovary weighing and counting them .Working fecundity assesed by separating eggs from their swiming leges while enomerate all egg . Complete randomized test of ANOVA for analysing the data were employed. The results showed average length and welght were calculated 122/07±1/74mm and 57/96±1/81gr respectively. Average absolute fecundity was 310/22 ±10/72 eggs , average working fecundity was 251/84±8/84 eggs, Average ovary weight was determined 4.31±0.619 gr and average number of eggs in one gr was 74/52±1/53 eggs. The sextual ratio in all year long was 1:1.32. The reproduction season is about seven month from Feburary to July and the moulting of males occurs two times each year. One of time is at May and the other is in September. The female molt thtina as the male start for second time.
    Keywords: Biology ; Iran ; Caspian Sea ; Bandar Anzali ; Biology ; Astacus leptodactylus eichwaldi ; Sex ratio ; Fecundity ; Silurus glanis ; ANOVA ; Female ; Male ; Coastal water
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  • 94
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    Estimation of MSY on six species of commercially important demersal fishes in the Persian Gulf & Oman Sea (Hormuzgan province) (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25274 | 18721 | 2018-09-07 07:40:17 | 25274 | Iranian Fisheries Science Research Institute
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    Publication Date: 2021-07-16
    Description: Today, calculation of MSY is one of the necessary fisheries management in control and prevention of the fish population reduction and is obtained with different methods. This study has focused on six species of commercial fish, including Tiger-toothed croaker, Javelin grunter, John`s snapper, Indian spiny turbot, Yellowfin seabream and Silver pomfret. The study was done monthly, from January 2007 to March 2008, in three fish landing regions including: Bandar Lengeh, Bandar Abbas and Qeshm Island (Slakh, Basydu and Chahoshrqy). Total 5163 Silver pomfret (Pompus argenteus), 1766 Javelin grunter (Pomadasys kaakan), 2151 John`s snapper (Lutjanus johnii), 3280 Tiger-toothed croaker (Otolithes ruber), 1628 Indian spiny turbot (Psettodes erumei) and the number of 759 Yellowfin seabream (Acnthopagrus latus) were assessed and length biometry has been done, monthly. In this study, two methods were used to determine the maximum sustainable yield (MSY): 1- virtual population analysis (Cohort analysis) 2- use of statistics and information that was estimated with two method, catch prediction and biomass (Standing stock). The results showed that in 2007, MSY value was estimated through catch prediction for Silver pomfret, Tigertoothed croaker, Javelin grunter, John`s snapper, Indian spiny turbot and Yellowfin seabream 1354, 1116, 1099.6, 1045.5, 914.5 and 529.5 tons, respectively. Moreover, this estimation have been done through standing stock for Silver pomfret, Tiger-toothed croaker, Javelin grunter, John`s snapper, Indian spiny turbot and Yellowfin seabream 1215, 633, 1304, 878, 1095 and 441 tons, respectively; and through VPA for Silver pomfret, Tiger-toothed croaker, Javelin grunter, John`s snapper, Indian spiny turbot and Yellowfin seabream 1100, 850, 920, 732.5, 1002.3 and 403 tons, respectively. Amount of biomass (Standing Stock) was estimated for Silver pomfret, Tiger-toothed croaker, Javelin grunter, John`s snapper, Indian spiny turbot and Yellowfin seabream 2530, 1172, 1738, 1689, 1470 and 1110 tons, respectively. In general, by assessing the obtained results for the studied species, except the fishing prediction results of the Javelin grunter and Tiger-toothed croaker species, which is less valuable due to the low correlation coefficient, it can be stated that except fishing pressure on John`s snapper and Tiger-toothed croaker, in other species studied, fishing conditions are in optimal situation.
    Keywords: Biology ; Iran ; Persian Gulf ; Oman Sea ; Hormuzgan Province ; Bandar Lengeh ; Bandar Abbas ; Qeshm Island ; Silver pomfret ; Tiger-toothed croaker ; Javelin grunter ; John `s snapper ; Indian spiny turbot ; Yellowfin seabream ; Biomass ; MSY ; Species ; Demersal fishes
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  • 95
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    Study on biological factors for artificial reefs in Hormozgan Province (Bandar Lengeh area) (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25290 | 18721 | 2018-09-07 07:55:23 | 25290 | Iranian Fisheries Science Research Institute
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    Publication Date: 2021-07-16
    Description: This study was carried out for growth of organism’s survey on artificial reef from 2004-2006 after establishment in Hormozgan offshore waters (Bandar Lengeh area). Also during this study we were examined some biological factors including: phytoplankton, zooplankton, ichthyoplankton and benthos from spring 2006 to winter 2006. In this study 43 phytoplankton genus were identified, 28 Bacillariophyceae (Diatom), 11 Dinophycea, 3 Cyanophycea and 1 Euglenaphycea. Bacillariophycea were dominant, Cyanophycea were high density observed in summer and Euglenaphycea was only observed in winter. The most abundant genus of diatoms were: Rhizosolenia, Navicula, Nitzschia, Coscinodiscus. Ceratium, Prorocentrum and Protoperidinium belong to Dinophycea, Oscillatoria belong to Cyanophycea were more than other genus. Copepoda and Nauplius were the most zooplankton and other group were respectively: Oikopleura, Polychaeta and Chaetognatha. The highest density of zooplankton was seen in winter. The statical study between different stations didn't show any significant (p〉0.05). 6 ichthyoplankton families were seen and identified. These families were Clupeidae, Gobbidae, Callionymidae, Sparidae, Engraulidae and Scianidae. The high density were respectively in summer and spring. The highest annual mean belong to Gobbidae family. Benthos groups were including: Crustacea, Mollusca, Polychaete, Nematoda, Nemertin, Foraminifera, Opiouridae and Echiura. Annual high density of Crustacea were observed in spring season, Polychaete and Mollusca were observed respectively in summer and winter. Organisms which growth on the artifical reef were consist of 12 group. These Organism were Barnacle belong to Crustacea with one genus (Megabalanus tintinnabulum), Sponga with 5 families and Tunicate. The highest density was in 2005. We were seen increasing in size in some organisms such as Crab, Polychaetes, Bivalvia and Fish Larvae. Statical study didn't show any significant between organisms in different parts of artificial reef (top, mid, bottom) and kind of artificial reef had no effect on growth of organisms but Barnacles had high density on mixed artificial reef.
    Keywords: Biology ; Ecology ; Iran ; Persian Gulf ; Hormozgan Province ; Bandar Lengeh ; Artificial reef ; Plankton ; Benthos ; Growth ; Organisms ; Phytoplankton ; Zooplankton ; Ichthyoplankton ; Bacillariophyceae ; Diatom ; Dinophycea ; Cyanophycea ; Euglenaphycea ; Rhizosolenia ; Navicula ; Nitzschia ; Coscinodiscus
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  • 96
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    Identification of Kerman Fishes (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25301 | 18721 | 2018-09-08 16:29:41 | 25301 | Iranian Fisheries Science Research Institute
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    Publication Date: 2021-07-16
    Description: This study was performed as a research program in Agricultural Research center of Kerman since 2000. During one year identification of fish in qanat basins of Markazi desert and Sirjan desert was carried out. In this study Electroshoker and salik net with o.5 and 1 cm network and padel net with 1cm were used to catch the fishes from 73 series of qanat. Parameters estimated in qanats (pH, Weather Temperature, Oxygen , Ec,...) Specified in sum 767 from fishes which were in 2 order 3 family and 3 species as: 1-Order: Cypriniformes. Family: Cyprinidaea Species: Capoeta damascina (Valenciennes, 1849) family: Balitoridaeb species: Schistura sargadensis (Nikolskii, 1900) 2-Order: Cyprinodontiforms Family: Poecilidaea Species: Gambusia affinis (Baird and Girard, 1853)
    Keywords: Biology ; Iran ; Kerman ; Sirjan ; Qanats ; Fish ; Capoeta damascina ; Gambusia affinis ; Schistura sargadensis ; pH ; Weather Temperature ; Oxygen ; Species ; Cypriniformes ; Cyprinidaea ; Balitoridaeb ; Cyprinodontiforms ; Poecilidaea ; Identification
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  • 97
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    Identification of distribution of Macrobrachium nipponense in freshwater ecosystems and coastal waters of Golestan Province, Caspian Sea (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25334 | 18721 | 2018-09-12 09:56:40 | 25334 | Iranian Fisheries Science Research Institute
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    Publication Date: 2021-07-16
    Description: Distribution of freshwater shrimp (Macrobrachium nipponense) in the freshwater ecosystems such as Alagol, Almagol, Ajigol lagoons, Gomishan lagoon and Gorganrud River. Sampling were done from may 2009 to my 2010 parameters such as, length frequency, growth rate, sampling, feeding, environmental factors and sedimentation were investigated. 3689 females and 8551 males were collected and biometrical parameters were recorded. Total length ranged between 3.2 to 98.7 mm. The parameters b of length-weight relationship in Alagol, Almagol, Ajigol were 3.49, 3.15, 3.45, 3.22 and 3.22, 3.28 for male and female, respectively. It shows in all lagoons for male and female growth is positive Allometric. Spawning period was from May to June. The length first at maturity (total and/or carapace) for three lagoons was 50.5 mm and 133 mm, respectively. The minimum and maximum of egg volume were 0.12 mm3 in Ajigol and 0.07 mm3 Alagol, respectively. The relationship between fecundity and length was found to be linear regression models for Alagol, Ajigol and nonlinear regression models for Almagol lagoon. Result showed that this species is omnivorous. The minimum and maximum temperature was 6.5ْ C in fall and 33ْ C in summer. The lowest and highest fluctuations of pH level in Ajigol and alagol lagoons were 8.2-9.2 and 7.2-9.8. Among three lagoons, the most EC was 5.9 Ms/c in Alagol lagoon. The Gorganrud River shows the maximum EC, 16.7 Ms/c.
    Keywords: Aquaculture ; Iran ; Caspian Sea ; Golestan province ; Alagol lagoon ; Almagol lagoon ; Ajigol lagoon ; Freshwater shrimp ; Macrobrachium nipponense ; Wetland ; Biology ; Ecosystems ; Sampling ; Growth ; Eggs ; Identification ; Distribution
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    Determing some important extracted materials, such as: Alginates of sodium & calcium and alginic acid in three species of brown seaweeds (Sargassum illicifolium, Cystoseira indica and Nizimuddinia zanardinii) in coastal area of Sistan and Baluochestan Province (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25376 | 18721 | 2018-09-14 07:34:10 | 25376 | Iranian Fisheries Science Research Institute
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    Publication Date: 2021-07-16
    Description: This study was determined some important extracted materials, Such as : Alginates of sodium & calcium and alginic acid in three species of brown seaweeds (Sargassum illicifolium , Cystoseira indica and Nizimuddinia zanardinii) during in different season in 1387 in coastal erea of Sistan and Baluochestan Provience. At First seaweeds sample were colected from sea beach and transferd to lab, so washed in fresh water and dried in the sun. So were under Alkaloid extraction with sodium carbonate (5 Persent), that were obtined fluid after filteration. The sodium alginate fibers extracted from fluid were combined by Alcohol. The calacium alginate fibers were deposited by calacium chlorids (5%) and Alginic acid resulted with chloridric acid (1N). The extraction yield of sodium alginate, calacium alginate and alginic acid in different samples of seaweeds with following Explaination: The presentage we have got, can be said , the present average of sodium alginate at Sargassum in Spring season in three areas (Chabahar, Tang and Pasabandar ) Respectively: 28.4±2 , 28.9±2 , 27.2±1.9 present, the present average of sodium alginate at Cystoseira in Spring in three areas at above mentioned goes in this way: 19.7±1.4, 18.6±1.4, 19.2±1.3 present and the present average of sodium alginate at Nizimuddinia in Spring were 23.4±1.5, 23.8±1.5 , 20.6±1.5 in these three areas. The present average of calacium alginate at Sargassum in Spring season in three areas (Chabahar, Tang and Pasabandar ): 33.7±0.5, 33.7±0.8, 33.1±1 present, the present average of calacium alginate at Cystoseira in Spring in three areas at above mentioned goes in this way: 28.8±1.5, 27.4±1, 27.4±1.5 present and the present average of calacium alginate at Nizimuddinia in Spring were 35.9±2.8, 23.9±1.5 , 35.9±2.8 in these three areas. The present average of Alginic acid at Sargassum in Spring season in three areas (Chabahar, Tang and Pasabandar ): 19.2±1.6 , 25.6±1.7 , 18.4±1.1 present, the present average of Alginic acid at Cystoseira in Spring in three areas at above mentioned goes in this way: 16.8±1.2, 15.8±1.1, 16.4±1 present and the present average of Alginic acid at Nizimuddinia in Spring were 19.2±1.6, 19.6±1.7 , 18.4±1.5 in these three areas. The present average of sodium alginate at Sargassum in Summer season in three areas (Chabahar, Tang and Pasabandar ) Respectively: 20.8±1, 21±1, 27.8±1.9 present, the present average of sodium alginate at Cystoseira in Summer in three areas at above mentioned goes in this way: 21±1.1, 13.2±1, 14.1±0.7 present and the present average of sodium alginate at Nizimuddinia in Summer were 25.3±2.3, 16.7±2.1, 15.3±1.3 in these three areas. The present average of calacium alginate at Sargassum in Summer season in three areas (Chabahar, Tang and Pasabandar): 29.5±2.1 , 29.7±2 , 28.3±2.2 present, the present average of calacium alginate at Cystoseira in Summer in three areas at above mentioned goes in this way: 21±1.1, 20.2±0.9, 20±0.7 present and the present average of calacium alginate at Nizimuddinia in Summer were 25.3±2.3, 29.7±2 , 23.1±1.5 in these three areas. The present average of Alginic acid at Sargassum in Summer season in three areas (Chabahar, Tang and Pasabandar): 19.5±0.7 , 19.7±0.6 , 18.7±0.7 present, the present average of Alginic acid at Cystoseira in Summer in three areas at above mentioned goes in this way: 21±1.1, 11.5±1.4, 11.1±1.5 present and the present average of Alginic acid at Nizimuddinia in Summer were 14.8±1.3, 15.3±1.3 , 14.6±1 in these three areas. The present average of sodium alginate at Sargassum in Autumn season in three areas (Chabahar, Tang and Pasabandar) Respectively: 31.5±4.3, 31.6±4.8, 29.4±4.8 present, the present average of sodium alginate at Cystoseira in Autumn in three areas at above mentioned goes in this way: 23±2.7, 21.4±2.8, 21.4±2.7 present and the present average of sodium alginate at Nizimuddinia in Autumn were 25.8±2.2, 26.4±2.1 , 23.4±1.9 in these three areas. The present average of calacium alginate at Sargassum in Autumn season in three areas (Chabahar, Tang and Pasabandar): 43.3±1.6, 42.8±2.7, 41.7±2.9 present, the present average of calacium alginate at Cystoseira in Autumn in three areas at above mentioned goes in this way: 34.3±5.9, 32.4±5.5, 30.9±5.2 present and the present average of calacium alginate at Nizimuddinia in Autumn were 50±7.1, 50.2±7.5, 45.6±5.2 in these three areas. The present average of Alginic acid at Sargassum in Autumn season in three areas (Chabahar, Tang and Pasabandar): 28±3.8, 28±3.5, 26±3.9 present, the present average of Alginic acid at Cystoseira in Autumn in three areas at above mentioned goes in this way: 20.2±1.8, 19.2±2.1, 18.7±1.6 present and the present average of Alginic acid at Nizimuddinia in Autumn were 25.9±3, 26.1±2.9, 24.6±3.6 in these three areas. The present average of sodium alginate at Sargassum in Winter season in three areas (Chabahar, Tang and Pasabandar) Respectively: 35±1.6, 35.2±1.8 , 33.8±1.9 present, the present average of sodium alginate at Cystoseira in Winter in three areas at above mentioned goes in this way: 24.1±2, 22.9±1.2, 23.3±0.7 present and the present average of sodium alginate at Nizimuddinia in Winter were 28.2±1.3, 29.2±1.7, 26.2±1.8 in these three areas. The present average of calacium alginate at Sargassum in Winter season in three areas (Chabahar, Tang and Pasabandar): 45.6±1.9, 45±2, 44.6±2.5 present, the present average of calacium alginate at Cystoseira in Winter in three areas at above mentioned goes in this way: 38.2±2.8, 35.9±3.4, 35.6±3.5 present and the present average of calacium alginate at Nizimuddinia in Winter were 56.4±3.5, 56±3.5, 51.8±2.5 in these three areas. The present average of Alginic acid at Sargassum in winter season in three areas (Chabahar, Tang and Pasabandar): 31.8±1.2, 32.1±0.9, 30.9±1.2 present, the present average of Alginic acid at Cystoseira in Winter in three areas at above mentioned goes in this way: 21.1±1.2, 20.4±1.4, 19.3±1.4 present and the present average of Alginic acid at Nizimuddinia in Winter were 26.4±2.1, 27±2.2, 24.6±2.2 in these three areas. The more amount of calacium alginate in Autumn can be found at Nizimuddinia in Tang area , wite amount of 50.2 present and the lates amount of Alginic acid at Cystoseira can be found in Summer with 11.1 present. If the Alginic acid become more than 20 present, it can be economical, that it can be showed more than 20 present in Autumn and Winter. According to this results, One way ANOVA showed that average of Alginates were not similar and significant differences ( P〈0.05 ) between species.
    Keywords: Biology ; Iran ; Sistan and Baluochestan Provience ; Chabahar ; Tang ; Alginic acid ; Species ; Brown seaweeds ; Sargassum illicifolium ; Cystoseira indica ; Nizimuddinia zanardinii ; Chloridric acid ; ANOVA ; Sodium ; Calcium ; Seaweeds
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    A search for cellular and molecular cytotoxic mechanisms of Cochlodinium polykricoides in isolated rat and fish hepatocytes (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25401 | 18721 | 2018-09-18 06:00:27 | 25401 | Iranian Fisheries Science Research Institute
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    Publication Date: 2021-07-16
    Description: In this research, we investigated and compared the cytotoxic mechanisms of aqueous extract of C.polykricoides responsible for a severe and widespread HAB in the Persian Gulf and Gulf of Oman (2008-2009) in both isolated rat and trout liver hepatocytes. In addition, the role of oxidative stress and mitochondria in the induction of apoptosis were also investigated. Isolated hepatocytes were obtained by collagenase perfusion of the rat liver. To determine the hepatocyte “ROS” generation, dichlorofluorescin diacetate was used as the reagent. The uptake of the cationic fluorescent dye, rhodamine 123, has been used for the determination of hepatocytes mitochondrial membrane potential. Redistribution of lysosomotropic probe, acridine orange from lysosomes into cytosol was used for determination of lysosomal membrane damage. GSH and GSSG were determined using spectrofluorometric method. Caspase-3 activity and apoptosis phenotype were also determined using ‘‘Sigma’s caspase-3 assay kit and Sigma–Aldrich apoptosis detection kit, respectively. Incubation of algal extract with isolated rat hepatocytes caused hepatocyte membrane lysis, reactive oxygen species formation (ROS), glutathione depletion, collapse of mitochondrial membrane potential, ATP depletion and increase in ADP/ATP ratio, cytochrome c release in to the hepatocyte cytosol, activation of caspases cascade and appearance of apoptosis phenotype. antioxidants (α-tocopherol succinate and BHT), hydroxyl radical scavenger (mannitol and DMSO), Mitochondrial permeability transition (MPT) pore sealing agents (cyclosporine A, carnitine and trifluoperazine), NADPH P450 reductase inhibitor (Diphenyliodonium chloride), CYP2E1 inhibitors (Phenylimidazole and 4-Methylpyrazole) and ATP generators (L-glutamine, Fructose and Xylitol) inhibited the activation of caspase-3 and cell death. Our data showed, that algal extract activate apoptosis signaling via oxidative stress and mitochondrial pathway. ROS formation could directly be involved in mitochondrial MPT pore opening and activation of caspases cascade leading to toxic effect of C.polykricoides extract on both rat and trout hepatocytes. These findings contribute to a better understanding of C.polykricoides-toxic effects on mammalian and aquatic liver cells. Our findings revealed that trout hepatocytes are much more sensitive ( more than two hundred folds) to toxic effects of C.polykricoides extract than rat hepatocytes. On the other hand the algal extract induced lysosomal membrane damage only in trout but not rat hepatocytes.
    Keywords: Biology ; Iran ; Persian Gulf ; Oman Sea ; C.polykricoides ; Cytotoxic ; Rat and trout ; Cellular ; Molecular ; Cochlodinium Polykricoides ; Generation ; GSH ; Apoptosis phenotype ; L-glutamine
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    The study on fishing and resource management of kilka fisheries within southern Caspian Sea (2021)
    Iranian Fisheries Science Research Institute | Tehran, Iran
    In:  http://aquaticcommons.org/id/eprint/25405 | 18721 | 2018-09-20 12:38:52 | 25405 | Iranian Fisheries Science Research Institute
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    Publication Date: 2021-07-16
    Description: The project of the Study on fishing and resource management of fisheries within Southern Caspian Sea was conducted on the base of an agreement made between fisheries organization (Shilat) and the Iranian fishery research organization (IFRO) signed in 2010. The study has several phases. The final report of the fishery on fishing and resource management of fisheries within Southern Caspian Sea (Gilan, Mazandaran & Golestan provinces) is consisted of several sections such as: 1- The Survey status of biology and catch of Kilka fishes , Bony fishes and Estrogen fishes and also the status of aquatic resource conservation in the Southern part of Caspian Sea 2- Fishing analysis in the Southern part of Caspian Sea 3- Fisheries development Strategies, policies and plans in the Southern part of Caspian Sea In this survey and library-based study, internal and external environmental factors of shilat activities are considered. Using SWOT analysis method, current situation of fisheries is investigated. In this regard, all fisheries activities were divided into four groups, then, the strengths, weaknesses, opportunities and treats of internal and external environment will be analyzed. A considerable number of tables and matrixes were prepared and policies and strategies as seen of final report were carried out.
    Keywords: Fisheries ; Iran ; Caspian Sea ; Gilan province ; Mazandaran Province ; Golestan Province ; Resource management ; IFRO ; Shilat ; Fishing ; Kilka ; Fisheries ; Survey ; Biology ; Bony fishes ; Estrogen ; Environmental factors
    Repository Name: AquaDocs
    Type: monograph
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    Format: 84
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