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  • Sociology  (109)
  • Pollution  (99)
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  • Fisheries Society of Nigeria  (25)
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  • 1
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    Major and trace element analytical methods of the National Status and Trends Program: 2000-2006 (2021)
    NOAA/National Centers for Coastal Ocean Science | Silver Spring, MD
    In:  http://aquaticcommons.org/id/eprint/14940 | 403 | 2014-03-17 18:30:31 | 14940 | United States National Ocean Service
    Details
    Publikationsdatum: 2021-06-29
    Beschreibung: This document contains analytical methods that detail the procedures for determining major and trace element concentrations in bivalve tissue and sediment samples collected as part of the National Status and Trends Program (NS&T) for the years 2000-2006. Previously published NOAA Technical Memoranda NOS ORCA 71 and 130 (Lauenstein and Cantillo, 1993; Lauenstein and Cantillo, 1998) detail trace element analyses for the years 1984-1992 and 1993-1996, respectively, and include ancillary, histopathology, and contaminant (organic and trace element) analytical methods.The methods presented in this document for trace element analysis were utilized by the NS&T Mussel Watch and Bioeffects Projects. The Mussel Watch Project has been monitoring contaminants in bivalves and sediment for over 20 years, and is the longest active contaminant monitoring program operating in U.S. costal waters. Approximately 280 Mussel Watch sites are monitored on biennial and decadal timescales using bivalve tissue and sediment, respectively. The Bioeffects Project applies the sediment quality approach, which uses sediment contamination measurements, toxicity tests and benthic macroinfauna quantification to characterize pollution in selected estuaries and coastal embayments. Contaminant assessment is a core function of both projects.Although only one contract laboratory was used by the NS&T Program during the specified time period, several analytical methods and instruments were employed. The specific analytical method, including instrumentation and detection limit, is noted for each measurement taken and can be found at http://NSandT.noaa.gov. The major and trace elements measured by the NS&T Program include: Al, Si, Cr, Mn, Fe, Ni, Cu, Zn, As, Se, Sn, Sb, Ag, Cd, Hg, Tl and Pb.
    Schlagwort(e): Ecology ; Fisheries ; Pollution
    Repository-Name: AquaDocs
    Materialart: monograph
    Format: application/pdf
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  • 2
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    Historical nitrogen and phosphorus loadings to the northern Gulf of Mexico (2021)
    NOAA/National Centers for Coastal Ocean Science | Silver Spring, MD
    In:  Dave.Whitall@noaa.gov | http://aquaticcommons.org/id/eprint/14936 | 403 | 2014-03-17 18:52:15 | 14936 | United States National Ocean Service
    Details
    Publikationsdatum: 2021-06-29
    Beschreibung: Primary productivity in many coastal systems is nitrogen (N) limited; although, phytoplankton productivity may be limited by phosphorus (P) seasonally or in portions of an estuary. Increases in loading of limiting nutrients to coastal ecosystems may lead to eutrophication (Nixon 1996). Anthropogenically enhanced eutrophication includes symptoms such as loss of seagrass beds, changes in algal community composition, increased algal (phytoplankton) blooms (Richardson et al. 2001), hypoxic or anoxic events, and fish kills (Bricker et al. 2003).
    Schlagwort(e): Ecology ; Fisheries ; Pollution
    Repository-Name: AquaDocs
    Materialart: monograph
    Format: application/pdf
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    Format: 16
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  • 3
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    Human use pharmaceuticals in the estuarine environment: a survey of the Chesapeake Bay, Biscayne Bay, and Gulf of the Farallones (2021)
    NOAA/National Ocean Service | Silver Spring, MD
    In:  http://aquaticcommons.org/id/eprint/14614 | 403 | 2014-02-20 22:12:24 | 14614 | United States National Ocean Service
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    Publikationsdatum: 2021-06-29
    Beschreibung: The assessment of emerging risks in the aquatic environment is a major concern and focus of environmental science (Daughton and Ternes, 1999). One significant class of chemicals that has received relatively little attention until recently are the human use pharmaceuticals. In 2004, an estimated 2.6 billion prescriptions were written for the top 300 pharmaceuticals in the U.S. (RxList, 2005). Mellon et al. (2001) estimated that 1.4 million kg of antimicrobials are used in human medicine every year. The use of pharmaceuticals is also estimated to be on par with agrochemicals (Daughton and Ternes, 1999). Unlike agrochemicals (e.g., pesticides) which tend to be delivered to the environment in seasonal pulses, pharmaceuticals are continuously released through the use/excretion and disposal of these chemicals, which may produce the same exposure potential as truly persistent pollutants. Human use pharmaceuticals can enter the aquatic environment through a number of pathways, although the main one is thought to be via ingestion and subsequent excretion byhumans (Thomas and Hilton, 2004). Unused pharmaceuticals are typically flushed down the drain or wind up in landfills (Jones et al. 2001).
    Schlagwort(e): Ecology ; Fisheries ; Management ; Pollution
    Repository-Name: AquaDocs
    Materialart: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 21
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  • 4
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    Field manual for investigating coral disease outbreaks (2021)
    NOAA/National Centers for Coastal Ocean Science | Silver Spring, MD
    In:  http://aquaticcommons.org/id/eprint/14918 | 403 | 2014-03-10 20:45:21 | 14918 | United States National Ocean Service
    Details
    Publikationsdatum: 2021-06-28
    Beschreibung: Coral reefs throughout their circumtropical range are declining at an accelerating rate. Recent predictions indicate that 20% of the world’s reefs have been degraded, another 24% are under imminent risk of collapse, and if current estimates hold, by 2030, 26% of the world’s reefs will be lost (Wilkinson 2004). Recent changes to these ecosystems have included losses of apex predators, reductions of important herbivorous fishes and invertebrates, and precipitous declines in living coral cover, with many reefs now dominated by macroalgae. Causes have been described in broad sweeping terms: global climate change, over-fishing and destructive fishing, land-based sources of pollution, sedimentation, hurricanes, mass bleaching events and disease. Recognition that corals can succumb to disease was first reported in the early 1970’s. Then it was a unique observation, with relatively few isolated reports until the mid 1990’s. Today disease has spread to over 150 species of coral, reported from 65 countries throughout all of the world’s tropical oceans (WCMC Global Coral Disease Database). While disease continues to increase in frequency and distribution throughout the world, definitive causes of coral diseases have remained elusive for the most part, with reef managers not sufficiently armed to combat it.
    Beschreibung: NOAA Technical Memorandum Coral Reef Conservation Program 6
    Schlagwort(e): Fisheries ; Health ; Management ; Pollution
    Repository-Name: AquaDocs
    Materialart: monograph
    Format: application/pdf
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    Format: 81
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  • 5
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    Ancillary methods of the National Status and Trends Program: update 2000-2006 (2021)
    NOAA/National Ocean Service | Silver Spring, MD
    In:  http://aquaticcommons.org/id/eprint/14610 | 403 | 2014-02-20 21:33:38 | 14610 | United States National Ocean Service
    Details
    Publikationsdatum: 2021-06-29
    Schlagwort(e): Ecology ; Fisheries ; Management ; Pollution
    Repository-Name: AquaDocs
    Materialart: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 17
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  • 6
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    Prioritizing county-level well-being: Moving toward assessment of Gulf Coast counties impacted by the Deepwater Horizon Industrial Disaster (2021)
    NOAA/National Ocean Service | Silver Spring, MD
    In:  http://aquaticcommons.org/id/eprint/14632 | 403 | 2014-02-23 00:17:29 | 14632 | United States National Ocean Service
    Details
    Publikationsdatum: 2021-06-30
    Beschreibung: To develop a portfolio of indicators and measures that could best measure changes in the social, economic, environmental and health dimensions of well-being in coastal counties we convened a group of experts March 8-9, 2011 in Charleston, SC, U.S.A. The region of interest was of the northern Gulf of Mexico, specifically, those coastal counties most impacted during the explosion and subsequent oil spill from the Macondo Prospect wellhead during the summer of 2010. Over the course of the two-day workshop participants moved through presentations and facilitated sessions to identify and prioritize potential indicators and measures deemed most valuable for capturing changes in well-being related to changes in or disruption of ecosystem services. The experts reached consensus on a list of indicators that are now being operationalized by NOAA researchers. The ultimate goal of this research project is to determine whether a meaningful set of social and economic indicators can be developed to document changes in well-being that occur as a result of changes in ecosystem services. The outcomes and outputs from the workshop that is the subject of this report helped us to identify high-quality indicators useful for measuring well-being.
    Schlagwort(e): Health ; Sociology
    Repository-Name: AquaDocs
    Materialart: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 48
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  • 7
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    National Status and Trends Bioeffects Program: field methods (2021)
    NOAA/National Centers for Coastal Ocean Science | Silver Spring, MD
    In:  http://aquaticcommons.org/id/eprint/14663 | 403 | 2014-02-24 20:07:47 | 14663 | United States National Ocean Service
    Details
    Publikationsdatum: 2021-07-01
    Beschreibung: Environmental quality indicators provide resource managers with information useful to assess coastal condition and scientifically defensible decisions. Since 1984, the National Oceanic and Atmospheric Administration (NOAA), through its National Status and Trends (NS&T) Program, has provided environmental monitoring data on chemical, physical, and biological indicators of coastal environments. The program has two major monitoring components to meet its goals. The Bioeffects Assessments Program evaluates the health of bays, estuaries, and the coastal zone around the nation using the Sediment Quality Triad technique that includes measuring sediment contaminant concentrations, sediment toxicity and benthic community structure. The Mussel Watch Program is responsible for temporal coastal monitoring of contaminant concentrations by quantifying chemicals in bivalve mollusks. The NS&T Program is committed to providing the highest quality data to meet its statutory and scientific responsibilities. Data, metadata and information products are managed within the guidance protocols and standards set forth by NOAA’s Integrated Ocean Observing System (IOOS) and the National Monitoring Network, as recommended by the 2004 Ocean Action Plan. Thus, to meet these data requirements, quality assurance protocols have been an integral part of the NS&T Program since its inception. Documentation of sampling and analytical methods is an essential part of quality assurance practices. A step-by–step summary of the Bioeffects Program’s field standard operation procedures (SOP) are presented in this manual.
    Schlagwort(e): Ecology ; Fisheries ; Pollution
    Repository-Name: AquaDocs
    Materialart: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 27
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  • 8
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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
    Details
    Publikationsdatum: 2021-07-01
    Schlagwort(e): Biology ; Ecology ; Fisheries ; Health ; Pollution
    Repository-Name: AquaDocs
    Materialart: monograph
    Format: application/pdf
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  • 9
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    Assessment of contaminant body burdens and histopathology of fish and shellfish species frequently used for subsistence food by Alaskan Native communities (2021)
    NOAA/National Centers for Coastal Ocean Science | Silver Spring, MD
    In:  http://aquaticcommons.org/id/eprint/14666 | 403 | 2014-02-26 20:27:41 | 14666 | United States National Ocean Service
    Details
    Publikationsdatum: 2021-07-01
    Beschreibung: Subsistence food items can be a health concern in rural Alaska because community members often rely on fish and wildlife resources not routinely monitored for persistent bioaccumulative contaminants and pathogens. Subsistence activities are a large part of the traditional culture, as well as a means of providing protein in the diets for Tribal members. In response to the growing concerns among Native communities, contaminant body burden and histopathological condition of chum and sockeye salmon(Oncorhynchus keta and Oncorhynchus nerka) and the shellfish cockles and softshell clams (Clinocardium nuttallii and Mya arenaria) were assessed. In the Spring of 2010, the fish and shellfish were collected from traditional subsistence harvest areas in the vicinity of Nanwalek, Port Graham, and Seldovia, AK, and were analyzed for trace metals and residues of organic contaminants routinely monitored by the NOAA National Status & Trends Program (NS&T). Additionally, the fish and shellfish were histologically characterized for the presence, prevalence and severity of tissue pathology, disease, and parasiteinfection. The fish and shellfish sampled showed low tissue contamination, and pathologic effects of the parasites and diseases were absent or minimal. Taken together, the results showed that the fish and shellfish were healthy and pose no safety concern for consumption. This study provides reliable chemistry and histopathology information for local resource managers and Alaska Native people regarding subsistence fish and shellfish use and management needs.
    Schlagwort(e): Fisheries ; Health ; Pollution
    Repository-Name: AquaDocs
    Materialart: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 63
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  • 10
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    Monitoring well-being and changing environmental conditions in coastal communities: development of an assessment method (2021)
    NOAA/National Centers for Coastal Ocean Science | Silver Spring, MD
    In:  maria.dillard@noaa.gov | http://aquaticcommons.org/id/eprint/14677 | 403 | 2014-02-24 20:50:31 | 14677 | United States National Ocean Service
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    Publikationsdatum: 2021-07-01
    Beschreibung: The intersection of social and environmental forces is complex in coastal communities. The well-being of a coastal community is caught up in the health of its environment, the stability of its economy, the provision of services to its residents, and a multitude of other factors. With this in mind, the project investigators sought to develop an approach that would enable researchers to measure these social and environmental interactions. The concept of well-being proved extremely useful for this purpose. Using the Gulf of Mexico as a regional case study, the research team developed a set of composite indicators to be used for monitoring well-being at the county-level. The indicators selected for the study were: Social Connectedness, Economic Security, Basic Needs, Health, Access to Social Services, Education, Safety, Governance, and Environmental Condition. For each of the 37 sample counties included in the study region, investigators collected and consolidated existing, secondary data representing multiple aspects of objective well-being. To conduct a longitudinal assessment of changing wellbeing and environmental conditions, data were collected for the period of 2000 to 2010. The team focused on the Gulf of Mexico because the development of a baseline of well-being would allow NOAA and other agencies to better understand progress made toward recovery in communities affected by the Deepwater Horizon oil spill. However, the broader purpose of the project was to conceptualize and develop an approach that could be adapted to monitor how coastal communities are doing in relation to a variety of ecosystem disruptions and associated interventions across all coastal regions in the U.S. and its Territories. The method and models developed provide substantial insight into the structure and significance of relationships between community well-being and environmental conditions. Further, this project has laid the groundwork for future investigation, providing a clear path forward for integrated monitoring of our nation’s coasts. The research and monitoring capability described in this document will substantially help counties, local organizations, as well state and federal agencies that are striving to improve all facets of community well-being.
    Schlagwort(e): Environment ; Sociology
    Repository-Name: AquaDocs
    Materialart: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 176
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  • 11
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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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    Publikationsdatum: 2021-07-01
    Beschreibung: 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.
    Schlagwort(e): Chemistry ; Environment ; Pollution
    Repository-Name: AquaDocs
    Materialart: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 22
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  • 12
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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
    Details
    Publikationsdatum: 2021-07-01
    Beschreibung: 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.
    Schlagwort(e): Chemistry ; Environment ; Pollution
    Repository-Name: AquaDocs
    Materialart: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 70
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  • 13
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    Assessing the impacts of the Deepwater Horizon oil spill: the National Status and Trends Program response; a summary report of coastal contamination (2021)
    NOAA/National Centers for Coastal Ocean Science | Silver Spring, MD
    In:  http://aquaticcommons.org/id/eprint/14686 | 403 | 2014-02-24 19:58:40 | 14686 | United States National Ocean Service
    Details
    Publikationsdatum: 2021-07-01
    Beschreibung: NOAA’s National Status and Trends Program (NS&T) collected oyster tissue and sediments for quantification of polycyclic aromatic hydrocarbons (PAHs) and petroleum associated metals before and after the landfall of oil from the Deepwater Horizon incident of 2010. These new pre- and post- landfall measurements were put into a historical context by comparing them to data collected in the region over three decades during Mussel Watch monitoring. Overall, the levels of PAHs in both sediment and oysters both pre- and post-landfall were within the range of historically observed values for the Gulf of Mexico. Some specific sites did have elevated PAH levels. While those locations generally correspond to areas in which oil reached coastal areas, it cannot be conclusively stated that the contamination is due to oiling from the Deepwater Horizon incident at these sites due to the survey nature of these sampling efforts. Instead, our data indicate locations along the coast where intensive investigation of hydrocarbon contamination should be undertaken. Post-spill concentrations of oil-related trace metals (V, Hg, Ni) were generally within historically observed ranges for a given site, however, nickel and vanadium were elevated at some sites including areas in Mississippi Sound and Galveston, Terrebonne, Mobile, Pensacola, and Apalachicola Bays. No oyster tissue metal body burden exceeded any of the United States Food and Drug Administration’s (FDA) shellfish permissible action levels for human consumption.
    Schlagwort(e): Ecology ; Fisheries ; Management ; Pollution
    Repository-Name: AquaDocs
    Materialart: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 16
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  • 14
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    Coral reef ecosystems of St. John, U.S. Virgin Islands: spatial and temporal patterns in fish and benthic communities (2001-2009) (2021)
    NOAA/National Centers for Coastal Ocean Science | Silver Spring, MD
    In:  Chris.Caldow@noaa.gov | http://aquaticcommons.org/id/eprint/14688 | 403 | 2014-02-24 23:22:43 | 14688 | United States National Ocean Service
    Details
    Publikationsdatum: 2021-07-01
    Beschreibung: Scientific and anecdotal observations during recent decades have suggested that the structure and function of the coral reef ecosystems around St. John, U.S. Virgin Islands have been impacted adversely by a wide range of environmental stressors. Major stressors included the mass die-off of the long-spined sea urchin (Diadema antillarum) in the early 1980s, a series of hurricanes (David and Frederick in 1979, and Hugo in 1989), overfishing, mass mortality of Acropora species and other reef-building corals due to disease and several coral bleaching events.In response to these adverse impacts, the National Centers for Coastal Ocean Science (NCCOS), Center for Coastal Monitoring and Assessment, Biogeography Branch (CCMA-BB) collaborated with federal and territorial partners to characterize, monitor, and assess the status of the marine environment around the island from 2001 to 2012. This 13-year monitoring effort, known as the Caribbean Coral Reef Ecosystem Monitoring Project (CREM), was supported by the NOAA Coral Reef Conservation Program as part of their National Coral Reef Ecosystem Monitoring Program.This technical memorandum contains analysis of nine years of data (2001-2009) from in situ fish belt transect and benthic habitat quadrat surveys conducted in and around the Virgin Islands National Park (VIIS) and the Virgin Islands Coral Reef National Monument (VICR). The purpose of this document is to:1) Quantify spatial patterns and temporal trends in (i) benthic habitat composition and (ii) fish species abundance, size structure, biomass, and diversity;2) Provide maps showing the locations of biological surveys and broad-scale distributions of key fish and benthic species and assemblages; and3) Compare benthic habitat composition and reef fish assemblages in areas under NPS jurisdiction with those in similar areas not managed by NPS (i.e., outside of the VIIS and VICR boundaries).This report provides key information to help the St. John management community and others understand the impacts of natural and man-made perturbations on coral reef and near-shore ecosystems. It also supports ecosystem-based management efforts to conserve the region’s coral reef and related fauna while maintaining the many goods and ecological services that they offer to society.
    Schlagwort(e): Ecology ; Fisheries ; Pollution
    Repository-Name: AquaDocs
    Materialart: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 150
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  • 15
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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
    Details
    Publikationsdatum: 2021-07-03
    Beschreibung: 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.
    Schlagwort(e): Biology ; Ecology ; Fisheries ; Management ; Pollution
    Repository-Name: AquaDocs
    Materialart: monograph
    Format: application/pdf
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    Format: 38
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  • 16
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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
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    Publikationsdatum: 2021-06-25
    Beschreibung: 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.
    Schlagwort(e): Biology ; Ecology ; Fisheries ; Management ; Pollution
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    Assessment and monitoring of marine debris in Gray's Reef National Marine Sanctuary (2021)
    NOAA/National Centers for Coastal Ocean Science | Silver Spring, MD
    In:  http://aquaticcommons.org/id/eprint/14832 | 403 | 2014-03-04 18:18:07 | 14832 | United States National Ocean Service
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    Publikationsdatum: 2021-06-26
    Beschreibung: Gray’s Reef National Marine Sanctuary (GRNMS) is located 32.4 km offshore of Sapelo Island, Georgia. The ecological importance of this area is related to the transition between tropical and temperate waters, and the existence of a topographically complex system of ledges. Due to its central location, GRNMS can be used as a focal site to study the accumulation and impacts of marine debris on the Atlantic continental shelf offshore of the Southeast United States. Previously, researchers characterized marine debris in GRNMS and reported that incidence of the debris at the limited densely colonized ledge sites was significantly greater than at sand or sparsely colonized live bottom, and is further influenced by the level of boating activity and physiographic characteristics (e.g., ledge height). Information gleaned from the initial marine debris characterization was used to devise a strategy for prioritizing cleanup and monitoring efforts. However, a significant gap in knowledge was the rate of debris accumulation.The primary objective of this study was to select, mark, and perform initial marine debris surveys at permanent monitoring sites within GRNMS to quantify long-term trends in types, abundance, impacts, and accumulation rates of debris. Ledge sites were selected to compare types, abundance, and accumulation rates of marine debris between a) areas of high and low use and b) short and tall ledges. Nine permanent monitoring sites were marked and initially surveyed in 2007/2008. Surveys were conducted within a 50 x 4 m transect for a total survey area of 200 square meters. All debris was removed and detailed information was taken on the types of debris, quantity, and associations with benthic fauna. Information on associations with benthic fauna included degree of entanglement, type of organism with which it is entangled or resting on, degree of fouling, and visible impacts such as tissue abrasions. Sites were re-surveyed approximately one year later to quantify new accumulation.During the initial survey, a total of ten debris items, totaling 16.3 kg in weight, were removed from two monitoring stations, both “tall” sites within the area of high boat use. Year-one accumulation totaled five items and approximately 7 kg in weight. Similar to the initial survey, all debris was found at sites in the area of high boat use. However, in contrast to the initial survey, two of these items were found on medium-height ledges. Removed items included fishing line, leaders, rope, plastic, and fabric. Although items were often encrusted in benthic biota or entangled on the ledge, impacts such as abrasions or other injuries were not observed.During the 2009 monitoring efforts, volunteer divers were trained to conduct the survey. Monitoring protocols were documented for GRNMS staff and included as an appendix of this report to enable long-term monitoring of sites.Additionally, national reconnaissance data (e.g. satellite, radar, aerial surveys) and other information on known fishing locations were examined for patterns of resource use and correlations with debris occurrence patterns. A previous model predicting the density of marine debris based on ledge features and boat use was refined and the results were used to generate a map of predicted debris density for all ledges.
    Schlagwort(e): Ecology ; Fisheries ; Management ; Pollution
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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
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    Publikationsdatum: 2021-06-27
    Beschreibung: 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.
    Beschreibung: National Status and Trends Program for Marine Environmental Quality
    Schlagwort(e): Chemistry ; Management ; Pollution
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    An assessment of polybrominated diphenyl ethers (PBDEs) in sediments and bivalves of the U.S. coastal zone (2021)
    NOAA/National Centers for Coastal Ocean Science | Silver Spring, MD
    In:  http://aquaticcommons.org/id/eprint/14877 | 403 | 2014-03-06 18:16:30 | 14877 | United States National Ocean Service
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    Publikationsdatum: 2021-06-27
    Beschreibung: NOAA’s Mussel Watch Program was designed to monitor the status and trends of chemical contamination of U.S. coastal waters, including the Great Lakes. The Program began in 1986 and is one of the longest running, continuous coastal monitoring programs that is national in scope. NOAA established Mussel Watch in response to a legislative mandate under Section 202 of Title II of the Marine Protection, Research and Sanctuaries Act (MPRSA) (33 USC 1442). In addition to monitoring contaminants throughout the Nation’s coastal shores, Mussel Watch stores samples in a specimen bank so that trends can be determined retrospectively for new and emerging contaminants of concern.In recent years, flame retardant chemicals, known as polybrominated diphenyl ethers (PBDEs), have generated international concern over their widespread distribution in the environment, their potential to bioaccumulate in humans and wildlife, and concern for suspected adverse human health effects. The Mussel Watch Program, with additional funding provided by NOAA’s Oceans and Human Health Initiative, conducted a study of PBDEs in bivalve tissues and sediments.This report, which represents the first national assessment of PBDEs in the U.S. coastal zone, shows that they are widely distributed. PBDE concentrations in both sediment and bivalve tissue correlate with human population density along the U.S. coastline. The national and watershed perspectives given in this report are intended to support research, local monitoring, resource management, and policy decisions concerning these contaminants.
    Beschreibung: NOAA National Status & Trends Mussel Watch Program
    Schlagwort(e): Fisheries ; 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
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    Publikationsdatum: 2021-06-27
    Beschreibung: 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.
    Beschreibung: NOAA Technical Memorandum Coral Reef Conservation Program 7
    Schlagwort(e): Biology ; Ecology ; Management ; Pollution
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    Sediment Quality Triad assessment in Kachemak Bay: characterization of soft bottom benthic habitats and contaminant bioeffects assessment (2021)
    NOAA/National Centers for Coastal Ocean Science | Silver Spring, MD
    In:  http://aquaticcommons.org/id/eprint/14865 | 403 | 2014-03-06 18:44:25 | 14865 | United States National Ocean Service
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    Publikationsdatum: 2021-06-27
    Beschreibung: A baseline environmental characterization of the inner Kachemak Bay, Alaska was conducted using the sediment quality triad approach based on sediment chemistry, sediment toxicity, and benthic invertebrate community structure. The study area was subdivided into 5 strata based on geophysical and hydrodynamic patterns in the bay (eastern and western intertidal mud flats, eastern and western subtidal, and Homer Harbor). Three to seven locations were synoptically sampled within each stratum using a stratified random statistical design approach. Three sites near the village of Port Graham and two sites in the footprint of a proposed Homer Harbor expansion were also collected for comparison. Concentrations of over 120 organic and metallic contaminants were analyzed. Ambient toxicity was assessed using two amphipod bioassays. A detailed benthic community condition assessment was performed. Habitat parameters (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.Sediments were mostly mixed silt and sand; characteristic of high energy habitats, with pockets of muddy zones. Organic compounds (PAHs, DDTs, PCBs, cyclodienes, cyclohexanes) were detected throughout the bay but at relatively low concentrations. Tributyltin was elevated in Homer Harbor relative to the other strata. With a few exceptions, metals concentrations were relatively low and probably reflect the input of glacial runoff. Relative to other sites, Homer Harbor sites were shown to have elevated concentrations of metallic and organic contaminants. The Homer Harbor stratum however, is a deep, low energy depositional environment with fine grained sediment. Concentrations of organic contaminants measured were five to ten times higher in the harbor sites than in the open bay sites. Concentration of PAHs is of a particular interest because of the legacy of oil spills in the region. There was no evidence of residual PAHs attributable to oil spills, outside of local input, beyond the confines of the harbor. Concentrations were one to ten times below NOAA sediment quality guidelines. Selected metal concentrations were found to be relatively elevated compared to other data collected in the region. However, levels are still very low in the scale of NOAA’s sediment quality guidelines, and therefore appear to pose little or no ecotoxicity threat to biota.Infaunal assessment showed a diverse assemblage with more than 240 taxa recorded and abundances greater than 3,000 animals m-22 in all but a few locations. Annelid worms, crustaceans, snails, and clams were the dominant taxa accounting for 63 %, 19%, 5%, and 7 % respectively of total individuals. Specific benthic community assemblages were identified that 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 eastern portion 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.Conditions at the sites immediately outside the existing Homer Harbor facility did not differ significantly from other subtidal locations in the open Kachemak Bay. The benthic fauna at Port Graham contained a significant number of species not found in Kachemak Bay. Contaminant conditions were variable depending on specific location. Selected metal concentrations were elevated at Port Graham and some were lower relative to Kachemak Bay, probably due to local geology. Some organic contaminants were accumulating at a depositional site.
    Schlagwort(e): Ecology ; Pollution
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    'Fa Tsai', a Chinese edible Nostoc in market. [Translation from: Bulletin of the Japanese Society of Phycology 8 124-126, 1960. ] (2021)
    Freshwater Biological Association | Windermere, UK
    In:  http://aquaticcommons.org/id/eprint/4837 | 1256 | 2011-09-29 15:50:12 | 4837 | Freshwater Biological Association
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    Publikationsdatum: 2021-07-06
    Beschreibung: The Nostoc 'Fa Tsai' is sometimes seen in Chinese cooking materials stores. It is investigated what 'Fa Tsai' consists of and where it originates.
    Beschreibung: Translated from Japanese into English
    Schlagwort(e): Biology ; Limnology ; Sociology ; Algae ; Food composition ; Sociological aspects
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    Corroborative studies on the effects of sample variation on three macroinvertebrate biological assessment methods at different water quality states (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5259 | 1256 | 2011-09-29 15:09:27 | 5259 | Freshwater Biological Association
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    Publikationsdatum: 2021-07-09
    Beschreibung: In recent collaborative biological sampling exercises organised by the Nottingham Regional Laboratory of the Severn-Trent Water Authority, the effect of handnet sampling variation on the quality and usefulness of the data obtained has been questioned, especially when this data is transcribed into one or more of the commonly used biological methods of water quality assessment. This study investigates if this effect is constant at sites with similar typography but differing water quality states when the sampling method is standardized and carried out by a single operator. An argument is made for the use of a lowest common denominator approach to give a more consistent result and obviate the effect of sampling variation on these biological assessment methods.
    Beschreibung: Bilateral study of methods 2 - Pollution Report No.8
    Schlagwort(e): Biology ; Limnology ; Pollution ; Sampling ; Samplers ; Methodology ; Standardization ; Rivers ; Invertebrate larvae ; England ; Trent River
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    Ecological indicators of water quality in small rivers (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5270 | 1256 | 2011-09-29 15:10:29 | 5270 | Freshwater Biological Association
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    Publikationsdatum: 2021-07-09
    Beschreibung: At the present time hydrobiological indicators are widely used for the control of surface water quality. Results of the applying of methods suggested at the 1st Soviet-American seminar (1975), development of improved methods and estimation of their usefulness for various conditions are presented in this report. Among the criteria permitting an estimation of the degree and character of changes in water quality and their connection with the functioning of river ecosystems in general, the biological tests of natural waters appears to be the most universal one and is being carried out in two main directions — ecological and physiological. This study summarises approaches in both directions.
    Schlagwort(e): Biology ; Limnology ; Pollution ; River water ; Rivers ; Water quality ; Water quality control ; Indicators
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    Format: application/pdf
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    The predicting power of models for eutrophication (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5287 | 1256 | 2011-09-29 15:12:00 | 5287 | Freshwater Biological Association
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    Publikationsdatum: 2021-07-09
    Beschreibung: Restoration of water-bodies from eutrophication has proved to be extremely difficult. Mathematical models have been used extensively to provide guidance for management decisions. The aim of this paper is to elucidate important problems of using models for predicting environmental changes. First, the necessity for a proper uncertainty assessment of the model, upon calibration, has not been widely recognized. Predictions must not be a single time trajectory; they should be a band, expressing system uncertainty and natural variability. Availability of this information may alter the decision to be taken. Second, even with well-calibrated models, there is no guarantee they will give correct projections in situations where the model is used to predict the effects of measures designed to bring the system into an entirely different ”operating point”, as is typically the case in eutrophication abatement. The concept of educated speculation is introduced to partially overcome this difficulty. Lake Veluwe is used as a case to illustrate the point. Third, as questions become more detailed, such as ”what about expected algal composition”, there is a greater probability of running into fundamental problems that are associated with predicting the behaviour of complex non-linear systems. Some of these systems show extreme initial condition sensitivity and even, perhaps, chaotic behaviour, and are therefore fundamentally unpredictable.
    Schlagwort(e): Ecology ; Limnology ; Pollution ; Eutrophication ; Algal blooms ; Phytoplankton ; Freshwater lakes ; Models ; Growth ; Modelling ; Equations ; Bacteria ; Prediction ; Netherlands ; Veluwemeer Lake
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    Eutrophication and the management of planktonic algae: What Vollenweider couldn't tell us (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5285 | 1256 | 2011-09-29 15:11:44 | 5285 | Freshwater Biological Association
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    Publikationsdatum: 2021-07-09
    Beschreibung: The ”Vollenweider model” is a sophisticated mathematical statement about the long-range behaviour of (mainly temperate) lakes and their ability to support phytoplankton chlorophyll. Misapplication of the model, against which Vollenweider himself warned, has led to many misconceptions about the dynamics of plankton in lakes and reservoirs and about how best to manage systems subject to eutrophication. This contribution intends to frame the most important issues in context of the phosphorus- loading and phosphorus-limitation concepts. Emphasis is placed on the need to distinguish rate-limitation from capacity-limitation, to understand which is more manageable and why, to discern the mechanisms of internal recycling and their importance, and to appreciate the respective roles of physical and biotic components in local control of algal dynamics. Some general approaches to the management of water quality in lakes and reservoirs to eutrophication are outlined.
    Schlagwort(e): Ecology ; Limnology ; Pollution ; Eutrophication ; Algal blooms ; Phytoplankton ; Models ; Phosphorus ; Ecosystem management ; Nutrients (mineral) ; Plant growth ; Growth regulators ; Freshwater lakes
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    The significance of sedimentation and sediments to phytoplankton growth in drinking-water reservoirs (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5290 | 1256 | 2011-09-29 15:08:14 | 5290 | Freshwater Biological Association
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    Publikationsdatum: 2021-07-09
    Beschreibung: In the mesotrophic-eutrophic Saidenbach Reservoir in Saxony, the nanoplankton and cyanobacteria have increased at the expense of diatom dominance, due to a doubling of the external phosphorus load in the last 15 years. However, the phosphorus sedimentation flux is still very high (up to 80% of the input), corresponding to more than 2 g m2 d-1 in terms of dry weight. There is a strong correlation between the abundance of diatoms in the euphotic zone and their sedimentation flux (with a delay of about 2 weeks). Only about 25% of the deposited material could be clearly attributed to plankton biomass; the remainder resulted from flocculation and precipitation processes or directly from the inflow of clay minerals. The ash content of the deposited material was high (73%). Thus the sedimentation flux can be considered to operate as an internal water-treatment/oligotrophication process within the lake. The neighbouring Neunzehnhain Reservoir still has a very clear water with a transparency up to 18 m depth. Though the sediment was not much lower than Saidenbach sediment in total phosphorus and total numbers of bacteria, sulphide was always absent and the ratio of Fe 2+ to Fe 3+ was very low in the upper (0- 5 cm) layer. Thus the external and internal phosphorus loads do not attain the critical level necessary to induce a ”phosphorus - phytoplankton” feedback loop.
    Schlagwort(e): Ecology ; Limnology ; Pollution ; Eutrophication ; Freshwater lakes ; Water quality control ; Phosphorus ; Water reservoirs ; Phytoplankton ; Growth ; Sedimentation ; Sediment composition ; Germany
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    Format: 94-106
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    Physical measures to inhibit planktonic cyanobacteriae (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5295 | 1256 | 2011-09-29 15:07:49 | 5295 | Freshwater Biological Association
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    Publikationsdatum: 2021-07-09
    Beschreibung: In a small lake, intermittent destratification was installed after several other physico-chemical and physical in-lake therapy measures (phosphorus immobilization, permanent destratification) had been tested without great success. If an aerobic sediment-water interface can be maintained, intermittent destratification removes cyanobacteria and prevents optimal development of other members of the photoautotrophic plankton. During growing seasons, increasing abundances of small-bodied herbivores (Bosmina) and Daphnia may have accounted for relatively low phytoplankton biomass as well. Intermittent destratification is a very fast-working in-lake measure and seems to be applicable even in relatively shallow lakes (〈 15 m), in which permanent destratification seems to be risky.
    Schlagwort(e): Ecology ; Limnology ; Pollution ; Eutrophication ; Algal blooms ; Destratification ; Ecosystem management ; Water quality control ; Phosphorus ; Eutrophic lakes ; Inhibitors ; Phytoplankton ; Zooplankton ; Biomass ; Germany ; Fischkaltersee
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    Format: application/pdf
    Format: 163-184
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    Calcite covering of sediment as a possible way of curbing blue-green algae (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5291 | 1256 | 2011-09-29 15:07:52 | 5291 | Freshwater Biological Association
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    Publikationsdatum: 2021-07-09
    Beschreibung: Natural calcite precipitation in lakes is a well-known control mechanism of eutrophication. In hard-water lakes, calcite deposits on the flat bottoms of shallow lakes and near the shores of deeper lakes resulted from biogenic decalcification during the millenia after the last glacial period. The objective of a new restoration technology is to intensify the natural process of precipitation by utilizing the different qualities of calcareous mud layers. In a pilot experiment in Lake Rudower See, East Germany, phosphorus-poor deeper layers of the sediments were flushed out and spread over the phosphorus-rich uppermost sediments, to promote the co- precipitation of calcite with phosphorus from the water-column.
    Schlagwort(e): Ecology ; Limnology ; Pollution ; Eutrophication ; Freshwater lakes ; Phosphorus ; Calcitization ; Algal blooms ; Calcite ; Sedimentation ; Germany
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    Format: application/pdf
    Format: 107-111
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    A control of gas-vacuolate cyanobacteria (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5301 | 1256 | 2011-09-29 15:07:11 | 5301 | Freshwater Biological Association
    Details
    Publikationsdatum: 2021-07-09
    Beschreibung: The cyanobacteria that cause problems in water supply are principally the colonial forms that are buoyed up by gas vesicles. The success of these organisms is due, in part, to their gas vesicles, which enable them to perform vertical migrations or to maintain themselves in the euphotic zone. The gas vesicles are also the root cause of the problems. In calm periods they cause the cyanobacteria to float to the water surface forming noxious scums, and they may prevent the colonies from sedimenting in water treatment plants. Gas vesicles are hollow, gas-filled structures; they are rigid but can be collapsed by the application of pressure. Their critical collapse pressure is influenced by their dimensions, which vary in different organisms. Gas vesicles are formed by the assembly of two types of protein, which determine their mechanical and physical properties. Methods for collapsing gas vesicles in natural populations of cyanobacteria will be considered. They may have application to the control of cyanobacteria in water supply.
    Schlagwort(e): Ecology ; Limnology ; Pollution ; Eutrophication ; Algal blooms ; Gases ; Buoyancy ; Algae ; Bacteria ; Photosynthesis ; Growth ; Competition
    Repository-Name: AquaDocs
    Materialart: book_section , FALSE
    Format: application/pdf
    Format: application/pdf
    Format: 150-162
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  • 31
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    Changes of water quality and sediment phosphorus of a small productive lake following decreased phosphorus loading (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5293 | 1256 | 2011-09-29 15:08:09 | 5293 | Freshwater Biological Association
    Details
    Publikationsdatum: 2021-07-09
    Beschreibung: Esthwaite Water is the most productive or eutrophic lake in the English Lake District. Since 1945 its water quality has been determined from weekly or biweekly measurements of temperature, oxygen, plant nutrients and phytoplankton abundance. The lake receives phosphorus from its largely lowland-pasture catchment, sewage effluent from the villages of Hawkshead and Near Sawrey, and from a cage-culture fish farm. From 1986 phosphorus has been removed from the sewage effluent of Hawkshead which was considered to contribute between 47% and 67% of the total phosphorus loading to the lake. At the commencement of phosphorus removal regular measurements of phosphorus in the superficial 0-4 cm layer of lake sediment were made from cores collected at random sites. Since 1986 the mean annual concentration of alkali-extractable sediment phosphorus has decreased by 23%. This change is not significant at the 5% level but nearly so. There has been no marked change in water quality over this period. Summer dominance of blue-green algae which arose in the early 1980s after decline of the previous summer forms, Ceratium spp., has been maintained. Improvement in water quality is unlikely to be achieved at the present phosphorus loading.
    Schlagwort(e): Chemistry ; Limnology ; Pollution ; Eutrophication ; Freshwater lakes ; Limnological surveys ; Phosphorus ; Phytoplankton ; Primary production ; Sediment analysis ; Water quality ; England ; Esthwaite Water
    Repository-Name: AquaDocs
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    Format: application/pdf
    Format: application/pdf
    Format: 119-131
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  • 32
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    The scope for biomanipulation in improving water quality (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5288 | 1256 | 2011-09-29 15:08:15 | 5288 | Freshwater Biological Association
    Details
    Publikationsdatum: 2021-07-09
    Beschreibung: Biomanipulation is a form of biological engineering in which organisms are selectively removed or encouraged to alleviate the symptoms of eutrophication. Most examples involve fish and grazer zooplankton though mussels have also been used. The technique involves continuous management in many deeper lakes and is not a substitute for nutrient control. In some lakes, alterations to the lake environment have given longer-term positive effects. And in some shallow lakes, biomanipulation may be essential, alongside nutrient control, in re- establishing former aquatic-plant-dominated ecosystems which have been lost through severe eutrophication. The emergence of biomanipulation techniques emphasises that lake systems are not simply chemical reactors which respond simply to engineered chemical changes, but very complex and still very imperfectly understood ecosystems which require a yet profounder understanding before they can be restored with certainty.
    Schlagwort(e): Ecology ; Limnology ; Pollution ; Eutrophication ; Algal blooms ; Freshwater lakes ; Biomanipulation ; Water quality control
    Repository-Name: AquaDocs
    Materialart: book_section , FALSE
    Format: application/pdf
    Format: application/pdf
    Format: 73-81
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  • 33
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    Structural dynamic eutrophication models (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5299 | 1256 | 2011-09-29 15:07:19 | 5299 | Freshwater Biological Association
    Details
    Publikationsdatum: 2021-07-09
    Beschreibung: This article discusses problems of modelling the seasonal succession of algal species in lakes and reservoirs, and the adaptive selection of certain groups of algae in response to changes in the inputs and relative concentrations of nutrients and other environmental variables. A new generation of quantitative models is being developed which attempts to translate some important biological properties of species (survival, variation, inheritance, reproductive rates and population growth) into predictions about the survival of the fittest, where ”fitness” is measured or estimated in thermodynamic terms. The concept of ”exergy” and its calculation is explored to examine maximal exergy as a measure of fitness in ecosystems, and its use for calculating changes in species composition by means of structural dynamic models. These models accomodate short-term changes in parameters that affect the adaptive responses (species selection) of algae.
    Schlagwort(e): Ecology ; Limnology ; Pollution ; Eutrophication ; Algal blooms ; Phytoplankton ; Freshwater lakes ; Models ; Growth ; Modelling ; Energy ; Inland water environment ; Thermodynamics
    Repository-Name: AquaDocs
    Materialart: book_section , FALSE
    Format: application/pdf
    Format: application/pdf
    Format: 59-72
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  • 34
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    A tool for better management of water quality during periods of algal blooms: the case of the River Oise (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5300 | 1256 | 2011-09-29 15:07:17 | 5300 | Freshwater Biological Association
    Details
    Publikationsdatum: 2021-07-09
    Beschreibung: Like other rivers in the Paris area, the Oise is subject to important seasonal algal blooms. This eutrophication generates notable problems for the production of drinking-water from a treatment plant on the river at Méry. A mathematical model has been developed to simulate variation in water quality in a pre-treatment storage basin, and another model is currently being adapted to model the River Oise. Integration of the two models should provide a comprehensive tool for predicting variations of phytoplankton and water-quality parameters associated with algal blooms. This will be a decision-aid for optimizing control of the treatment process for providing potable water.
    Schlagwort(e): Ecology ; Limnology ; Pollution ; Eutrophication ; Algal blooms ; Water treatment ; Water supply ; Modelling ; Models ; Phytoplankton ; Water management ; France ; Oise River
    Repository-Name: AquaDocs
    Materialart: book_section , FALSE
    Format: application/pdf
    Format: application/pdf
    Format: 143-149
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  • 35
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    The ecological impact of different mechanisms of chronic sub-lethal toxicity on feeding and respiratory physiology (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5307 | 1256 | 2011-09-29 15:06:39 | 5307 | Freshwater Biological Association
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    Publikationsdatum: 2021-07-09
    Beschreibung: Sub-lethal toxicity tests, such as the scope-for-growth test, reveal simple relationships between measures of contaminant concentration and effect on respiratory and feeding physiology. Simple models are presented to investigate the potential impact of different mechanisms of chronic sub-lethal toxicity on these physiological processes. Since environmental quality is variable, even in unimpacted environments, toxicants may have differentially greater impacts in poor compared to higher quality environments. The models illustrate the implications of different degrees and mechanisms of toxicity in response to variability in the quality of the feeding environment, and variability in standard metabolic rate. The models suggest that the relationships between measured degrees of toxic stress, and the maintenance ration required to maintain zero scope-for-growth, may be highly nonlinear. In addition it may be possible to define critical levels of sub-lethal toxic effect above which no environment is of sufficient quality to permit prolonged survival.
    Schlagwort(e): Biology ; Limnology ; Pollution ; Toxicity ; Sublethal effects ; Toxicity tests ; Models ; Metabolism ; Narcosis ; Animal physiology ; Risk management ; Respiration
    Repository-Name: AquaDocs
    Materialart: book_section , FALSE
    Format: application/pdf
    Format: application/pdf
    Format: 88-97
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  • 36
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    Molecular biomarkers and toxic consequences of impact by organic pollution in aquatic organisms (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5314 | 1256 | 2011-09-29 15:06:13 | 5314 | Freshwater Biological Association
    Details
    Publikationsdatum: 2021-07-09
    Beschreibung: Organic contaminants are readily bioaccumulated by aquatic organisms. Exposure to and toxic effects of contaminants can be measured in terms of the biochemical responses of the organisms (i.e. molecular biomarkers). The hepatic biotransformation enzyme cytochrome P4501A (CYP1A) in vertebrates is specifically induced by organic contaminants such as aromatic hydrocarbons, PCBs and dioxins, and is involved in chemical carcinogenesis via catalysis of the covalent binding of organic contaminants to DNA (DNA-adducts). Hepatic CYP1A induction has been used extensively and successfully as a biomarker of organic contaminant exposure in fish. Fewer but equally encouraging studies in fish have used hepatic bulky, hydrophobic DNA-adducts as biomarkers of organic contaminant damage. Much less is known of the situation in marine invertebrates, but a CYPlA-like enzyme with limited inducibility and some potential for biomarker application is indicated. Stimulation of reactive oxygen species (ROS) production is another potential mechanism of organic contaminant-mediated DNA and other damage in aquatic organisms. A combination of antioxidant (enzymes, scavengers) and pro-oxidant (oxidised DNA bases, lipid peroxidation) measurements may have potential as a biomarker of organic contaminant exposure (particularly those chemicals which do not induce CYP1A) and/or oxidative stress, but more studies are required. Both CYP1A- and ROS-mediated toxicity are indicated to result in higher order deleterious effects, including cancer and other aspects of animal fitness.
    Schlagwort(e): Biology ; Environment ; Pollution ; Biomarkers ; Toxicity ; Aquatic organisms ; Biological pollutants ; Enzymes ; Hydrocarbons ; Mutagens ; Pollutants ; Animal diseases ; Fish
    Repository-Name: AquaDocs
    Materialart: book_section , FALSE
    Format: application/pdf
    Format: application/pdf
    Format: 154-171
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  • 37
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    Viruses and drinking water (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5320 | 1256 | 2011-09-29 15:05:44 | 5320 | Freshwater Biological Association
    Details
    Publikationsdatum: 2021-07-09
    Beschreibung: There is no evidence to indicate that there is a risk of acquiring a virus infection through the consumption of properly treated drinking water, provided the integrity of the distribution system is maintained and there is no post-treatment contamination. The consumption of inadequately treated, untreated or post-treatment contaminated water is, however, associated with a risk of hepatitis A, hepatitis E and viral gastroenteritis. The use of the standard bacterial indicators for water monitoring provides an adequate safeguard against viral contamination.
    Schlagwort(e): Health ; Limnology ; Pollution ; Public health ; Microbial contamination ; Viral diseases ; Viruses ; Water treatment ; Pollution indicators
    Repository-Name: AquaDocs
    Materialart: book_section , FALSE
    Format: application/pdf
    Format: application/pdf
    Format: 43-47
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  • 38
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    Cultural methods of detection for microorganisms: recent advances and successes (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5317 | 1256 | 2011-09-29 15:05:35 | 5317 | Freshwater Biological Association
    Details
    Publikationsdatum: 2021-07-09
    Beschreibung: Most microbiological methods require culture to allow organisms to recover or to selectively increase, and target organisms are identified by growth on specific agar media. Many cultural methods take several days to complete and even then the results require confirmation. Alternative techniques include the use of chromogenic and fluorogenic substances to identify bacteria as they are growing, selective capture using antibodies after short periods of growth, molecular techniques, and direct staining with or without flow cytometry for enumeration and identification. Future microbiologists may not use culture but depend on the use of specific probes and sophisticated detection systems.
    Schlagwort(e): Engineering ; Limnology ; Pollution ; Water quality ; Microorganisms ; Methodology ; Detection ; Bacteria ; Cultured organisms ; Enzymes ; Immunofluorescence ; Flow cytometry ; Microbiological culture
    Repository-Name: AquaDocs
    Materialart: book_section , FALSE
    Format: application/pdf
    Format: application/pdf
    Format: 19-27
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  • 39
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    The microbiological quality of water: the nature of the problem (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5315 | 1256 | 2011-09-29 15:06:22 | 5315 | Freshwater Biological Association
    Details
    Publikationsdatum: 2021-07-09
    Beschreibung: Improvements in methods for the detection and enumeration of microbes in water, particularly the application of techniques of molecular biology, have highlighted shortcomings in the ”standard methods” for assessing water quality. Higher expectations from the consumer and increased publicity associated with pollution incidents can lead to an uncoupling of the cycle which links methodological development with standard-setting and legislation. The new methodology has also highlighted problems within the water cycle, related to the introduction, growth and metabolism of microbes. A greater understanding of the true diversity of the microbial community and the ability to transmit genetic information within aquatic systems ensures that the subject of this symposium and volume provides an ideal forum to discuss the problems encountered by both researcher and practitioner.
    Schlagwort(e): Biology ; Limnology ; Pollution ; Water quality ; Microbiology ; Microorganisms ; Hydrologic cycle ; Methodology ; Bacteria ; Bacterial counters ; Public health ; Microbial contamination ; Primary production ; Fungi ; Cryptosporidium
    Repository-Name: AquaDocs
    Materialart: book_section , FALSE
    Format: application/pdf
    Format: application/pdf
    Format: 1-10
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  • 40
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    Detection of specific bacteria in water: implications of survival strategy (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5318 | 1256 | 2011-09-29 15:05:37 | 5318 | Freshwater Biological Association
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    Publikationsdatum: 2021-07-09
    Beschreibung: It is widely recognised that conventional culture techniques may underestimate true viable bacterial numbers by several orders of magnitude. The basis of this discrepancy is that a culture in or on media of high nutrient concentration is highly selective (either through ”nutrient shock” or failure to provide vital co-factors) and decreases apparent diversity; thus it is unrepresentative of the natural community. In addition, the non-culturable but viable state (NCBV) is a strategy adopted by some bacteria as a response to environmental stress. The basis for the non-culturable state is that cells placed in conditions present in the environment cannot be recultured but can be shown to maintain their viability. Consequently, these cells would not be detected by standard water quality techniques that are based on culture. In the case of pathogens, it may explain outbreaks of disease in populations that have not come into contact with the pathogen. However, the NCBV state is difficult to attribute, due to the failure to distinguish between NCBV and non-viable cells. This article will describe experiences with the fish pathogen Aeromonas salmonicida subsp. salmonicida and the application of molecular techniques for its detection and physiological analysis.
    Schlagwort(e): Ecology ; Limnology ; Pollution ; Bacteria ; Bacterial diseases ; Detection ; Methodology ; Molecular biology ; Microbiological culture
    Repository-Name: AquaDocs
    Materialart: book_section , FALSE
    Format: application/pdf
    Format: application/pdf
    Format: 28-34
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  • 41
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    The impact of molecular biology on assessment of water quality: advantages and limitations of current techniques (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5316 | 1256 | 2011-09-29 15:05:33 | 5316 | Freshwater Biological Association
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    Publikationsdatum: 2021-07-09
    Beschreibung: The advent of molecular biology has had a dramatic impact on all aspects of biology, not least applied microbial ecology. Microbiological testing of water has traditionally depended largely on culture techniques. Growing understanding that only a small proportion of microbial species are culturable, and that many microorganisms may attain a viable but non-culturable state, has promoted the development of novel approaches to monitoring pathogens in the environment. This has been paralleled by an increased awareness of the surprising genetic diversity of natural microbial populations. By targeting gene sequences that are specific for particular microorganisms, for example genes that encode diagnostic enzymes, or species-specific domains of conserved genes such as 16S ribosomal RNA coding sequences (rrn genes), the problems of culture can be avoided. Technical developments, notably in the area of in vitro amplification of DNA using the polymerase chain reaction (PCR), now permit routine detection and identification of specific microorganisms, even when present in very low numbers. Although the techniques of molecular biology have provided some very powerful tools for environmental microbiology, it should not be forgotten that these have their own drawbacks and biases in sampling. For example, molecular techniques are dependent on efficient lysis and recovery of nucleic acids from both vegetative forms and spores of microbial species that may differ radically when growing in the laboratory compared with the natural environment. Furthermore, PCR amplification can introduce its own bias depending on the nature of the oligonucleotide primers utilised. However, despite these potential caveats, it seems likely that a molecular biological approach, particularly with its potential for automation, will provide the mainstay of diagnostic technology for the foreseeable future.
    Schlagwort(e): Engineering ; Limnology ; Pollution ; Water quality ; Microbiology ; Microorganisms ; Methodology ; Molecular biology ; DNA ; Polymerase chain reaction ; Detection ; RNA ; Bacteria ; Bacterial diseases
    Repository-Name: AquaDocs
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    Format: application/pdf
    Format: application/pdf
    Format: 11-18
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  • 42
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    Metallothionein as an indicator of water quality: assessment of the bioavailability of cadmium, copper, mercury and zinc in aquatic animals at the cellular level (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5313 | 1256 | 2011-09-29 15:06:23 | 5313 | Freshwater Biological Association
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    Publikationsdatum: 2021-07-09
    Beschreibung: The study of metallothioneins (MTs) has greatly improved our understanding of body burdens, metal storage and detoxification in aquatic organisms subjected to contamination by the toxic heavy metals, Cd, Cu, Hg and Zn. These studies have shown that in certain organisms MT status can be used to assess impact of these metals at the cellular level and, whilst validation is currently limited to a few examples, this stress response may be linked to higher levels of organisation, thus indicating its potential for environmental quality assessment. Molluscs, such as Mytilus spp., and several commonly occurring teleost species, are the most promising of the indicator species tested. Natural variability of MT levels caused by the organism's size, condition, age, position in the sexual cycle, temperature and various stressors, can lead to difficulties in interpretation of field data as a definitive response-indicator of metal contamination unless a critical appraisal of these variables is available. From laboratory and field studies these data are almost complete for teleost fish. Whilst for molluscs much of this information is lacking, when suitable controls are utilised and MT measurements are combined with observations of metal partitioning, current studies indicate that they are nevertheless a powerful tool in the interpretation of impact, and may prove useful in water quality assessment.
    Schlagwort(e): Environment ; Oceanography ; Pollution ; Water quality ; Cadmium ; Copper ; Mercury ; Zinc ; Aquatic animals ; Cytology ; Metallothioneins ; Environmental monitoring ; Indicators ; Scotland
    Repository-Name: AquaDocs
    Materialart: book_section , FALSE
    Format: application/pdf
    Format: application/pdf
    Format: 138-153
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  • 43
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    Production of positive controls for calcivirus-specific PCR using recombinant baculiovirus technology (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5321 | 1256 | 2011-09-29 15:06:11 | 5321 | Freshwater Biological Association
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    Publikationsdatum: 2021-07-09
    Beschreibung: Recent advances in our knowledge of the genetic structure of human caliciviruses (HuCVs) and small round-structured viruses (SRSVs) have led to the development of polymerase chain reaction (PCR)-based molecular tests specific for these viruses. These methods have been developed to detect a number of human pathogenic viruses in environmental samples including water, sewage and shellfish. HuCVs and SRSVs are not culturable, and no animal model is currently available. Therefore there is no convenient method of preparing viruses for study or for reagent production. One problem facing those attempting to use PCR-based methods for the detection of HuCVs and SRSVs is the lack of a suitable positive control substrate. This is particularly important when screening complex samples in which the levels of inhibitors present may significantly interfere with amplificiation. Regions within the RNA polymerase regions of two genetically distinct human caliciviruses have been amplified and used to produce recombinant baculoviruses which express RNA corresponding to the calicivirus polymerase. This RNA is being investigated as a positive control substrate for PCR testing, using current diagnostic primer sets. Recombinant baculovirus technology will enable efficient and cost-effective production of large quantities of positive control RNA with a specific known genotype. We consider the development of these systems as essential for successful screening and monitoring applications.
    Schlagwort(e): Health ; Limnology ; Pollution ; Polymerase chain reaction ; Viruses ; Viral diseases ; RNA ; Primers ; Cloning ; Diarrhetic shellfish poisoning ; Public health ; Sewages
    Repository-Name: AquaDocs
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    Format: application/pdf
    Format: application/pdf
    Format: 48-53
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  • 44
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    Tastes and odours in potable water:perception versus reality (2021)
    Freshwater Biological Association | Ambleside, UK
    In:  http://aquaticcommons.org/id/eprint/5324 | 1256 | 2011-09-29 15:05:13 | 5324 | Freshwater Biological Association
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    Publikationsdatum: 2021-07-09
    Beschreibung: Tastes and odours are amongst the few water quality standards immediately apparent to a consumer and, as a result, account for most consumer complaints about water quality. Although taste and odour problems can arise from a great many sources, from an operational point of view they are either ”predictable” or ”unpredictable”. The former - which include problems related to actinomycete and algal growth - have a tendency to occur in certain types of water under certain combinations of conditions, whereas the latter - typically chemical spills - can occur anywhere. Long-term control is one option for predictable problems, although biomanipulation on a large scale has had utile success. Detection and avoidance is a more practicable option for both predictable and unpredictable problems, particularly if the distribution network can be serviced from other sources. Where these are not feasible, then water treatment, typically using activated carbon, is possible. In general there is a reasonable understanding of what compounds cause taste and odour problems, and how to treat these. An efficient taste and odour control programme therefore relies ultimately on good management of existing resources. However, a number of problems lie outside the remit of water supply companies and will require more fundamental regulation of activities in the catchment.
    Schlagwort(e): Limnology ; Sociology ; Water supply ; Taste ; Odour ; Water treatment ; Fresh water ; Monitoring
    Repository-Name: AquaDocs
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    Format: application/pdf
    Format: application/pdf
    Format: 71-80
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  • 45
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    Distribution of persistent organic contaminants in canyons and on the continental shelf off central California (2021)
    NOAA/National Centers for Coastal Ocean Science | Silver Spring, MD
    In:  http://aquaticcommons.org/id/eprint/14944 | 403 | 2014-03-17 17:44:18 | 14944 | United States National Ocean Service
    Details
    Publikationsdatum: 2021-06-29
    Beschreibung: The National Status and Trends (NS&T) Program has conducted studies to determine the spatial extent and severity of chemical contamination and associated adverse biological effects in coastal bays and estuaries of the United States since 1991. Sediment contamination in U.S. coastal areas is a major environmental issue because of its potential toxic effects on biological resources and often, indirectly, on human health. Thus, characterizing and delineating areas of sediment contamination and toxicity and demonstrating their effect(s) on benthic living resources are therefore important goals of coastal resource management at NOAA.The National Centers for Coastal Ocean Science, and the Office of National Marine Sanctuaries, in cooperation with the U.S. Geological Survey (USGS), University of California Moss Landing Marine Lab (MLML), and the Monterey Bay Aquarium Research Institute (MBARI), conducted ecosystem monitoring and characterization studies within and between marine sanctuaries along the California coast in 2002 and 2004 on the NOAA RV McArthur. One of the objectives was to perform a systematic assessment of the chemical and physical habitats and associated biological communities in soft bottom habitats on the continental shelf and slope in the central California region. This report addresses the magnitude and extent of chemical contamination, and contaminant transport patterns in the region. Ongoing studies of the benthic community are in progress and will be reported in an integrated assessment of habitat quality and the parameters that govern natural resource distributions on the continental margin and in canyons in the region.
    Schlagwort(e): Environment ; Health ; Pollution
    Repository-Name: AquaDocs
    Materialart: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 67
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  • 46
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    An ecological characterization of the Stellwagen Bank National Marine Sanctuary Region: oceanographic, biogeographic, and contaminants assessment (2021)
    NOAA/National Ocean Service | Silver Spring, MD
    In:  tim.battista@noaa.gov | http://aquaticcommons.org/id/eprint/14584 | 403 | 2014-02-20 19:08:08 | 14584 | United States National Ocean Service
    Details
    Publikationsdatum: 2021-06-29
    Beschreibung: The mission of NOAA’s National Marine Sanctuary Program (NMSP) is to serve as the trustee for a system of marine protected areas, to conserve, protect, and enhance their biodiversity, ecological integrity, and cultural legacy while facilitating compatible uses. Since 1972, thirteen National Marine Sanctuaries, representing a wide variety of ocean environments, have been established, each with management goals tuned to their unique diversity. Extending from Cape Ann to Cape Cod across the mouth of Massachusetts Bay, Stellwagen Bank National Marine Sanctuary (NMS) encompasses 2,181 square kilometers of highly productive, diverse, and culturally unique Federal waters. As a result of its varied seafloor topography, oceanographic conditions, and high primary productivity, Stellwagen Bank NMS is utilized by diverse assemblages of seabirds, marine mammals, invertebrates, and fish species, as well as containing a number of maritime heritage resources. Furthermore, it is a region of cultural significance, highlighted by the recent discovery of several historic shipwrecks. Officially designated in 1992, Stellwagen Bank became the Nation’s twelfth National Marine Sanctuary in order to protect these and other unique biological, geological, oceanographic, and cultural features of the region. The Stellwagen Bank NMS is in the midst of its first management plan review since designation. The management plan review process, required by law, is designed to evaluate, enhance, and guide the development of future research efforts, education and outreach, and the management approaches used by Sanctuaries. Given the ecological and physical complexity of Stellwagen Bank NMS, burgeoning anthropogenic impacts to the region, and competing human and biological uses, the review process was challenged to assimilate and analyze the wealth of existing scientific knowledge in a framework which could enhance management decision-making. Unquestionably, the Gulf of Maine, Massachusetts Bay, and Stellwagen Bank-proper are extremely well studied systems, and in many regards, the scientific information available greatly exceeds that which is available for other Sanctuaries. However, the propensity of scientific information reinforces the need to utilize a comprehensive analytical approach to synthesize and explore linkages between disparate information on physical, biological, and chemical processes, while identifying topics needing further study. Given this requirement, a partnership was established between NOAA’s National Marine Sanctuary Program (NMSP) and the National Centers for Coastal Ocean Science (NCCOS) so as to leverage existing NOAA technical expertise to assist the Sanctuary in developing additional ecological assessment products which would benefit the management plan review process.
    Schlagwort(e): Ecology ; Fisheries ; Management ; Oceanography ; Pollution
    Repository-Name: AquaDocs
    Materialart: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 356
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  • 47
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    Linking elements of the Integrated Ocean Observing System (IOOS) with the planned National Water Quality Monitoring Network. Proceedings from the NOAA-Supported workshop 19-21 September 2005 (2021)
    NOAA/National Ocean Service | Silver Spring, MD
    In:  http://aquaticcommons.org/id/eprint/14613 | 403 | 2014-02-20 21:58:49 | 14613 | United States National Ocean Service
    Details
    Publikationsdatum: 2021-06-29
    Beschreibung: The National Oceanic and Atmospheric Administration (NOAA), in cooperation with the New Jersey Marine Sciences Consortium (NJMSC), hosted a workshop at Rutgers University on 19-21 September 2005 to explore ways to link the U.S. Integrated Ocean Observing System (IOOS) to the emerging infrastructure of the National Water Quality Monitoring Network (NWQMN). Participating partners included the Mid-Atlantic Coastal Ocean Observing Regional Association, U.S. Geological Survey, Rutgers University Coastal Ocean Observing Laboratory, and the New Jersey Sea Grant College. The workshop was designed to highlight the importance of ecological and human health linkages in the movement of materials, nutrients, organisms and contaminants along the Delaware Bay watershed-estuary-coastal waters gradient (hereinafter, the “Delaware Bay Ecosystem [DBE]”), and to address specific water quality issues in the mid-Atlantic region, especially the area comprising the Delaware River drainage and near-shore waters. Attendees included federal, state and municipal officials, coastal managers, members of academic and research institutions, and industry representatives.The primary goal of the effort was to identify key management issues and related scientific questions that could be addressed by a comprehensive IOOS-NWQMN infrastructure (US Commission on Ocean Policy 2004; U.S. Ocean Action Plan 2004). At a minimum, cooperative efforts among the three federal agencies (NOAA, USGS and EPA) involved in water quality monitoring were required. Further and recommended by the U.S. Commission on Ocean Policy, outreach to states, regional organizations, and tribes was necessary to develop an efficient system of data gathering, quality assurance and quality control protocols, product development, and information dissemination.
    Schlagwort(e): Ecology ; Management ; Pollution
    Repository-Name: AquaDocs
    Materialart: monograph
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  • 48
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    Characterizing Jobos Bay, Puerto Rico: a watershed modeling analysis and monitoring plan (2021)
    NOAA/National Centers for Coastal Ocean Science | Silver Spring, MD
    In:  Adam.Zitello@noaa.gov | http://aquaticcommons.org/id/eprint/14937 | 403 | 2014-03-17 17:43:43 | 14937 | United States National Ocean Service
    Details
    Publikationsdatum: 2021-06-29
    Beschreibung: Land-based pollution is commonly identified as a major contributor to the observed deterioration of shallow-water coral reef ecosystem health. Human activity on the coastal landscape often induces nutrient enrichment, hypoxia, harmful algal blooms, toxic contamination and other stressors that have degraded the quality of coastal waters. Coral reef ecosystems throughout Puerto Rico, including Jobos Bay, are under threat from coastal land uses such as urban development, industry and agriculture. The objectives of this report were two-fold: 1. To identify potentially harmful land use activities to the benthic habitats of Jobos Bay, and 2. To describe a monitoring plan for JobosBay designed to assess the impacts of conservation practices implemented on the watershed.This characterization is a component of the partnership between the U.S. Department of Agriculture (USDA) and the National Oceanic and Atmospheric Administration (NOAA) established by the Conservation Effects Assessment Project (CEAP) in Jobos Bay. CEAP is a multi-agency effort to quantify the environmental benefits of conservation practices used by private landowners participating in USDA programs. The Jobos Bay watershed, located in southeastern Puerto Rico, was selected as the first tropical CEAP Special Emphasis Watershed (SEW). Both USDA and NOAA use their respective expertise in terrestrial and marine environments to model and monitor Jobos Bay resources.This report documents NOAA activities conducted in the first year of the three-year CEAP effort in Jobos Bay. Chapter 1 provides a brief overview of the project and background information on Jobos Bay and its watershed. Chapter 2 implements NOAA’s Summit to Sea approach to summarize the existing resource conditions on the watershed and in the estuary. Summit to Sea uses a GIS-based procedure that links patterns of land use in coastal watersheds to sediment and pollutant loading predictions at the interface between terrestrial and marineenvironments. The outcome of Summit to Sea analysis is an inventory of coastal land use and predicted pollution threats, consisting of spatial data and descriptive statistics, which allows for better management of coral reef ecosystems. Chapters 3 and 4 describe the monitoring plan to assess the ecological response to conservationpractices established by USDA on the watershed.Jobos Bay is the second largest estuary in Puerto Rico, but has more than three times the shoreline of any other estuarine area on the island. It is a natural harbor protected from offshore wind and waves by a series of mangrove islands and the Punta Pozuelo peninsula. The Jobos Bay marine ecosystem includes 48 km² of mangrove, seagrass, coral reef and other habitat types that span both intertidal and subtidal areas. Mapping of Jobos Bay revealed 10 different benthic habitats of varying prevalence, and a large area of unknown bottom type covering 38% of the entire bay. Of the known benthic habitats, submerged aquatic vegetation, primarily seagrass, is the most common bottom type, covering slightly less than 30% of the bay. Mangroves are the dominant shoreline feature, while coral reefs comprise only 4% of the total benthic habitat. However, coral reefs are some of the most productive habitats found in Jobos Bay, and provide important habitat and nursery grounds for fish and invertebrates of commercial and recreational value.
    Beschreibung: Conservation Effects Assessment Project, in partnership with U.S. Department of Agriculture
    Schlagwort(e): Ecology ; Management ; Planning ; Pollution
    Repository-Name: AquaDocs
    Materialart: monograph
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    Format: application/pdf
    Format: 81
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  • 49
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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
    Details
    Publikationsdatum: 2021-06-29
    Beschreibung: 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.
    Schlagwort(e): Chemistry ; Fisheries ; Pollution
    Repository-Name: AquaDocs
    Materialart: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 64
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  • 50
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    1983 Biscayne Bay hydrocarbon study: final report (2021)
    NOAA/National Ocean Service | Silver Spring, MD
    In:  http://aquaticcommons.org/id/eprint/14615 | 403 | 2014-02-20 22:05:58 | 14615 | United States National Ocean Service
    Details
    Publikationsdatum: 2021-06-29
    Beschreibung: A two year, comprehensive, quantitative investigation was conducted to analyze and identify the spatial distribution of petrogenic and biogenic hydrocarbons in sediments, surface waters, fish and shellfish of Biscayne Bay, Florida. The goal for the first year of the project was to establish baseline information to support oil spill impact assessment and clean-up. One hundred fifty-five sediment and eleven biota samples were collected. The areas sampled included the Miami River, Intracoastal Waterway, tidal flats, access canals and environmentally sensitive shorelines. The second year of the study centered on areas exhibiting petroleum contamination. These areas included the Miami River, Little River, Goulds Canal, Black Creek and Military Canal. Surface and subsurface sediment, biota and surface water were collected. Sample collection, analyses, and data handling for the two year project were conducted so that all information was court-competent and scientifically accurate. Chain of custody was maintained for all samples. Total hydrocarbon content of surface sediments ranged from below detection limits to a high of 2663.44 pg/g. Several sample stations contained petroleum contamination. The majority of biota samples exhibited hydrocarbon concentrations and characteristics that indicated little, if any, petroleum contamination. Surface water samples ranged from 0.78 to 64.47 μg/L and several samples contained petroleum hydrocarbons. Our results indicate several areas of petroleum contamination. These areas are characterized by industrial complexes, port facilities, marinas, major boating routes and many of the major tributaries emptying into Biscayne Bay.
    Schlagwort(e): Environment ; Pollution
    Repository-Name: AquaDocs
    Materialart: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 100
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  • 51
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    Effects of crude oil and the fractions on the blood haemoglobin and neutrophil concentrations in Heterobranchus bidorsalis juveniles (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/22997 | 19325 | 2018-03-05 09:06:04 | 22997 | Fisheries Society of Nigeria
    Details
    Publikationsdatum: 2021-07-12
    Beschreibung: Studies on the effects of crude oil and its fractions on the blood haemoglobin (HB) neutrophil (NP) concentration in the blood of Heterobranchus bidorsalis juveniles were carried out. Two study periods (toxicity and recovery) and four oil types (Bonny-light crude oil (BLCO), premium motor spirit (PMS), kerosene (DPK) and lubricating engine oil (lBO) at 1.00, 2.00, 4.00 and 8.00ml were used. There were significant differences (P〈0.05, p〈 0.01) on the HB and NP values in blood of fish samples. The elevated values of HB levels in fish exposed to 2.00,4.00 and 8.00m1 L-1 BLCC, 2.00ml L-1 PMS and DPK; and 4.00ml L -1 LBO over the levels in the control fish were in consonance with the results of other workers. Increases in NP values in fish exposed to the four oil types (BLCO, PMS, DKP and LBO) relative to the control could be part of the immunological attempts by the fish to mobilize the body's defence mechanisms. The relatively high percent mortality and low survival of H. bidorsalis juveniles exposed to 4.00 and 8.00mlL-1 concentration of the four oil types over the other concentration implied that these concentrations were probably lethal to fish existence.
    Beschreibung: Includes:- 4 tables.;23 refs.
    Schlagwort(e): Fisheries ; Health ; Pollution ; Heterobranchus bidorsalis ; Nigeria ; Delta State ; freshwater environment ; Crude oil ; Fish ; Toxicity ; Haemoglobins ; Lethal effects
    Repository-Name: AquaDocs
    Materialart: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 152 - 159
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  • 52
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    Assessment of capital assets and utilization amongst artisanal fishers in Tatabu fishing community (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/23054 | 19325 | 2018-03-06 15:33:34 | 23054 | Fisheries Society of Nigeria
    Details
    Publikationsdatum: 2021-07-12
    Beschreibung: Sustainable development in Tatabu fishing community can hardly be attained without a systematic socio-economic consideration of the productive activities and development needs of the people. Generally two important factors play a great role in rural livelihoods; the prevailing structures and processes and access to assets, which can be combined in a various ways to generate positive outcomes. In essence poverty and the opportunity to escape from it depends on all the above. The assets comprise of human, natural, social, physical and financial. The present study (emperically analyzed their strength, linkages and the effects of policy and structures on them, particularly as it translates to the socio-economic well-being of the fishers.
    Beschreibung: Includes:- 3 tables.;9 refs.
    Schlagwort(e): Fisheries ; Sociology ; Nigeria ; Tatabu L. ; Livelihood ; freshwater environment ; Artisanal fishing ; Investments ; Financial resources ; Fishery economics ; Labour
    Repository-Name: AquaDocs
    Materialart: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 353 - 358
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  • 53
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    Women in frozen fish marketing in Lagos State: strategies and methods (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/23067 | 19325 | 2018-03-10 14:36:09 | 23067 | Fisheries Society of Nigeria
    Details
    Publikationsdatum: 2021-07-12
    Beschreibung: Lagos state has a major sea port for landing of frozen fish from Mauritania, Senegal, the Scottish waters and other European countries. In the last three years, the dense population of the state has encouraged all kinds of trade to thrive. Fish as a major food in many Nigerian diets has been known to complement the high carbohydrate intake of majority of the Nigerian populace because of the unaffordable prices of beef in the market. The market for frozen fish is rich in Lagos. It has provided many women fishmongers a livelihood for over a decade. They have been able to sustain their families and improve their social status over the years. This study reports the modus operandi of the trade. The study covered a period of three months. Fish sales were monitored in Epe, Oyingbo, Ijora and Alaba markets. The cooperation of the heads of markets (Iya Olojas) were requested at every market. It was ensured that observations and the interviews/questionnaires do not interfere with the women's activities. Specific areas focused upon in the study included countries of fish imports, most acceptable species, packaging, purchase price, sales price and profit margins. Other important factors in the fish market that were studied included entrance into the fish marketing business, sources of finance and problems. The study also made suggestions on how to improve upon the fish marketing business of women in Lagos State.
    Beschreibung: Includes:- 1 table.;3 refs.
    Schlagwort(e): Fisheries ; Sociology ; Nigeria ; Lagos State ; Frozen Fish ; freshwater environment ; marine environment ; Women ; Frozen products ; Processed fishery products ; Marketing ; Chilling storage
    Repository-Name: AquaDocs
    Materialart: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 409 - 412
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  • 54
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    Sediment quality of lower reaches of Okpoka Creek, Niger Delta, Nigeria (2021)
    Fisheries Society of Nigeria | Kaduna, Nigeria
    In:  http://aquaticcommons.org/id/eprint/23283 | 19325 | 2018-03-28 16:00:48 | 23283 | Fisheries Society of Nigeria
    Details
    Publikationsdatum: 2021-07-13
    Beschreibung: The sediment is the ultimate sink of contaminants in the aquatic systems. The physico-chemical quality of sediments lower reaches of Okpoka Creek was assessed for two years (wet and dry lsons).Sediment samples were collected at low and high tides from three stations according to standard methods. These were analysed for sediment particle size (sand, silt and clay), pH, total hydrocarbon (THC), total organic matter (TOM), total organic carbon (TOC) and conductivity. Analysis of variance (ANOVA), Duncan multiple range (DMR) and Pearson correlation cofficient were used to analyse the data. The sediment consisted of sand (57.86 ~c2.65%); silt 17.47~c1.68%) and clay (24.67~c1.33%). Sediment particle size showed significant spatial variation (p〈 0.05).The sediment values pH (5.22~c0.27) and THC (0.24 ~c0.05g/g) were low unlike TOM (2.42~c0.26%), TOC (1.43~c0.17%) and conductivity (5077.61~c 847.88s/cm).The TOM and TOC values exceeded FEPA and USEPA acceptable levels in sediments. The presence high levels of TOM and TOC indicate organic pollution in the lower reaches of Okpoka Creek. Therefore, environmental surveillance of these parts of the creek is advocated.
    Beschreibung: Includes:- 2 tables.;1 fig.;12 refs.
    Schlagwort(e): Earth Sciences ; Pollution ; Nigeria ; Okpoka Creek ; freshwater environment ; Sediment analysis ; Sediments ; Sediment chemistry ; Sediment load ; Pollution
    Repository-Name: AquaDocs
    Materialart: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 12-15
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  • 55
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    Mercury content of some canned seafood collected from Nigerian retail markets (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23444 | 19325 | 2018-05-02 08:30:46 | 23444 | Fisheries Society of Nigeria
    Details
    Publikationsdatum: 2021-07-14
    Beschreibung: Twenty samples of canned seafood consisting of tuna, mackerel, sardines, prawn and shrimp were collected from retail operations in Victoria Island, Lagos, Nigeria. Mercury content in these canned seafood were determined after digestion by the Association of Official Analytical Chemists methods. The mercury contents for all the canned seafood products have concentrations well below the permissible EU levels for this toxic metal. Their contribution to the body burden can therefore be considered negligible and the canned seafood products seem to be safe for human consumption.
    Beschreibung: Includes:-1 table.;13 refs.
    Schlagwort(e): Fisheries ; Pollution ; Nigeria ; freshwater environment ; Mercury ; Heavy metals ; Pollution ; Chemical pollution
    Repository-Name: AquaDocs
    Materialart: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 171-173
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  • 56
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    Impact of oil exploration on fisherfolks' livelihood and safety of fisheries industry in Nigeria (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23443 | 19325 | 2018-05-02 08:29:36 | 23443 | Fisheries Society of Nigeria
    Details
    Publikationsdatum: 2021-07-14
    Beschreibung: There have been many outcries in the Nigerian media on the various environmental degradation of the vast water space in the Niger Delta area of Nigeria by oil explorers. About 70% of the Nigerian populace lives in the coastal areas where the occupation is predominantly fishing and farming. For most of the publications, the extents of impact on the fishing industry are not addressed in order for solutions to be given. Production from the fisheries sector has dropped astronomically thereby earning the country a deficit due to importation of frozen fish to the country. In this study, a survey of three states (Bayelsa, Rivers and Delta) in the Niger Delta area of Nigeria was done. The communities studied include Ogulagha, Okobelema and Okpoama. Personal interviews with fishermen and primary data on the sector’s contribution to fish production and GDP were also carried out. The study aimed at finding out the sources and nature of degradation and the impacts such have on the fishing industry and the socio-economics of the fishermen. The study revealed that there are no significant difference in the negative impacts of environmental degradation caused by the activities of the oil companies on the socio-economics of the fishermen ((F2,27=0.59, P〉0.05)) The difference is not significant and the hypothesis is therefore accepted. The major impact on fishing was depletion in catches and low income earnings by fishermen with a resultant poor quality of living and livelihood. Oil spills, foreign vessels incursions and bunkering, vandalization of pipelines were identified sources of depletion in fish catches from the wild. The personal interviews and Focus Group Discussion (FGDs) showed that most heads of communities rely on the remuneration they get from the companies and refused to mobilize the fishermen for joint action against the oil companies. Mitigation measures usually carried out by the oil companies do not actually replenish the destroyed mangroves where breeding of fishes take place. The communities need the Government to institute high level surveillance of the high seas and monitor the activities of oil explorers as well as education of the communities on the effects of bunkering near shoreline.
    Beschreibung: Includes:- 1 table
    Schlagwort(e): Fisheries ; Pollution ; Sociology ; Nigeria ; Delta State ; Nigeria ; Bayelsa State ; Nigeria Rivers State ; brackishwater environment ; Degradation ; Pollution effects ; Oil spills ; Oil pollution
    Repository-Name: AquaDocs
    Materialart: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 158-161
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  • 57
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    Bioaccumulation of heavy metals in freshwater Clarias anguillaris and Parachanna africana from Lake Geriyo in Yola, Nigeria (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23447 | 19325 | 2018-05-02 08:36:01 | 23447 | Fisheries Society of Nigeria
    Details
    Publikationsdatum: 2021-07-14
    Beschreibung: This study was carried out to determine the bioaccumulation of heavy metals in Clarias anguillaris and Parachanna africana from Lake Geriyo Yola, Nigeria using energy dispersive X-ray fluorescence (EDXRF) spectrophotometer. The results in (mg/kg, dry weight) showed different levels of Cr, Cu, Mn, Fe, Ni, Zn, and Pb in the two fish species. The order of heavy metals accumulated by C. anguillaris and P. africana are Cr〉Fe〉Zn 〉 Mn〉Cu〉Ni〉Pb and Ni〉Fe〉Zn〉Cu respectively. The levels of Cr, Mn and Ni in C. anguillaris and in Ni in P. africana were higher than WHO and FEPA recommended maximum permissible limits (MPL) in fish, while the levels of Zn, Cu and Pb were below the standards. The results suggest that Lake Geriyo has high pollution loads of these heavy metals in fishes and could pose a health hazards to man. Consequently, close monitoring of heavy metal loads in Lake Geriyo is recommended with a view to minimizing the risks to health of the population that depend on the lake for their water and fish supply.
    Beschreibung: Includes:- 1 table.;13 refs.
    Schlagwort(e): Fisheries ; Pollution ; Clarias anguillaris ; Nigeria ; Geriyo L. ; freshwater environment ; Bioaccumulation ; Pollution effects ; Heavy metals ; Hazard assessment
    Repository-Name: AquaDocs
    Materialart: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 185-188
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  • 58
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    Microbiological index of water pollution in Lake Kivu, Rwanda (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23451 | 19325 | 2018-05-04 17:34:56 | 23451 | Fisheries Society of Nigeria
    Details
    Publikationsdatum: 2021-07-14
    Beschreibung: Investigation of the microbiological purity of Lake Kivu as index of water pollution was carried out in Gisenyi, Kibuye and Cyangugu over a period of 24 months. Microbial load did not differ significantly with season and locations but Fecal Coliform (FC) had positive significant correlation (r = 0.36; p〈0.05) with season. Mean Total Coliform (TC) (cfu/100ml) was highest 7.7 x 105 in Gisenyi and lowest 1.7 x 105 at Cyangugu. These values exceeded the 5000 colony forming units/100ml recommended by WHO for public surface water supplies. Total heterotrophic bacterial (THB), FC, TC and Fecal streptococcus (FS) were widespread with abnormally high values in the sampling locations signifying poor water quality. Microbial isolates from the water samples were of wide range of groups and their occurrence and distribution varied from location to location. Bacillus sp, E. coli, Citrobacter freundii, Klebsiella pneumonia and Proteus sp were the cosmopolitan microbial species in the lake water. The microbial quality of the water was poor rendering it unsafe for domestic purposes without treatment and this was largely caused by direct contamination of the lake by animals and human domestic wastes.
    Beschreibung: Includes:- 2 tables.;3 figs.;14 refs.
    Schlagwort(e): Biology ; Limnology ; Pollution ; Rwanda ; Kivu L. ; freshwater environment ; Microbial contamination ; Microbiological analysis ; Water quality ; Water pollution
    Repository-Name: AquaDocs
    Materialart: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 220- 225
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  • 59
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    Toxicity of drilling fluid XP-07 on microbial load and survival of Oreochromis niloticus fingerlings (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23441 | 19325 | 2018-05-02 08:26:44 | 23441 | Fisheries Society of Nigeria
    Details
    Publikationsdatum: 2021-07-14
    Beschreibung: Static bioassays were carried out in the laboratory for 96h to investigate the effect of Parateq a synthetic base mud on the fingerling of Orechromis niloticus and their microbial population. The fingerlings were exposed to different concentrations (0, 1000, 3000, 5000 and 9000Mg/l) of drilling fluid. Fish mortality data were recorded at 24, 48, 72 and 96h and analysed using Finney’s Probit Analysis method to calculate LC50 values (concentration of drilling fluid in water that will kill 50% of the fish population in 96 hours). The 96h LC50 was 2210Mg/l.The mortality increased with increase in concentration, while, the lethal times decreased as concentration increased. The bacterial biomass ranged from 1.59 x 108 to 6.0 x 106CFU/ml while fungal biomass ranged from1.0 x 103 to 2.1 x 104 CFU/ml. Results revealed that there was an increase in fungal biomass with increase in mud concentration and a decrease in bacterial biomass with increase in mud concentration.
    Beschreibung: Includes:- 2 tables.;1 fig.;20 refs.
    Schlagwort(e): Biology ; Fisheries ; Pollution ; Oreochromis niloticus ; Nigeria ; Aluu Rivers State ; freshwater environment ; Toxicity ; Microbiological analysis ; Microbial contamination ; Pollution effects ; Chemical pollutants
    Repository-Name: AquaDocs
    Materialart: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 147-152
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  • 60
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    Comparative analysis of physicochemical characteristics of ABU and Zaria Dam (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23440 | 19325 | 2018-05-02 08:25:12 | 23440 | Fisheries Society of Nigeria
    Details
    Publikationsdatum: 2021-07-14
    Beschreibung: The physical and chemical parameters of ABU Dam and Zaria Dam were carried out between September and October 2009. The results obtained in the two water bodies were temperature 27.7 0C, pH (7.5 and 7.3), dissolved oxygen (5.8 mg/l and 5.0 mg/l), biochemical oxygen demand (1.74 mg/l and 2. 16 mg/l), alkalinity (58 mg CaC03/l and 49 mgCaCO3/l) P04-P (2.47 mg/l and 1.59 mg/l) NO3-N (3.67 mg/l and 3.47 mg/l), conductivity (54.70 ~ks-1 and 42.48 ~ks-1), total hydrocarbon (TH) (47.66 mg/l) and 48.00 mg/l) and total dissolved solids (32.68 mg/l and 25.35 mg/l) respectively. There was no significant difference in the mean values of the parameters (P〉0.05) except conductivity and total dissolved solids. The water bodies were found to be neutral with high conductivity. All the properties in the water bodies were in conformity with international standards both for drinking and aquatic life.
    Beschreibung: Includes:- 2 tables.;7 refs.
    Schlagwort(e): Chemistry ; Limnology ; Pollution ; Nigeria ; Zaria Dam ; Nigeria ; ABU Dam ; freshwater environment ; Physicochemical properties ; Pollution
    Repository-Name: AquaDocs
    Materialart: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 144-146
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  • 61
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    Toxicity of herbicide Propanil on Oreochromis niloticus fingerlings (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23438 | 19325 | 2018-05-02 08:16:59 | 23438 | Fisheries Society of Nigeria
    Details
    Publikationsdatum: 2021-07-14
    Beschreibung: A static bioassay method to determine the acute toxicity of the herbicide propanil to Oreochromis niloticus was investigated under Laboratory conditions for 96 hours exposure period. Concentrations of propanil used include: 0.0096ml/l, 0.0103ml/l, 0.011ml/l and 0.012ml/l respectively. The lethal concentration (LC50) value of propanil on fingerlings of Oreochromis niloticus was 0.0097ml/l for 96 hours of exposure. The regression equation for probit kill from propanil was found to be Y = 29.84 + 12.33* log conc. (r2 0.9951, Y = Probit kill). Fish showed various abnormal behaviours upon exposure to propanil. Immediate reaction was erratic swimming and tendency to jump out of the test bowl. Others include: restlessness, un-coordinated movement, vertical swimming, air gulping, equilibrium loss, a period of quiescence and eventually death.
    Beschreibung: Includes:- 2 tables.;1 fig.;21 refs.
    Schlagwort(e): Fisheries ; Pollution ; Oreochromis niloticus ; Nigeria ; Markudi ; freshwater environment ; Toxicity ; Lethal effects ; Toxicants ; Pollution effects ; Fingerlings ; Herbicides
    Repository-Name: AquaDocs
    Materialart: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 138-143
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  • 62
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    Tissue distribution of heavy metals in fin fish from a tidal fish farm in South East Nigeria (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23450 | 19325 | 2018-05-04 17:32:24 | 23450 | Fisheries Society of Nigeria
    Details
    Publikationsdatum: 2021-07-14
    Beschreibung: The concentration of heavy metals: Lead (Pb), Cadmium (Cd), Iron (Fe) and Zinc (Zn) in tissues of fin fish from a tidal fish farm in Calabar, South East Nigeria, was determined. The mean levels of heavy metals (~kgg-1) in gills, muscle tissues, liver and intestines of catfish were Pb: 2.39~c1.24; Cd: 0.87~c0.83; Fe: 3.96~c1.55; Zn: 8.15~c3.18. Mean levels in Tilapia were Pb: 0.035~c0.002; Cd: 0.61~c0.05; Fe: 1.09~c0.61; Zn: 2.17~c0.53. There was no significant difference (p〈0.05) in tissue concentrations of Pb and Cd whereas a significant difference (p〈0.05) was observed between Pb and Zn concentrations for both species of fish. Concentrations were also higher in liver, gills and muscle tissues than the intestines. Highest concentrations were observed in the liver and gills in both species. Generally, higher concentrations were observed in liver, gills and muscles of Catfish than in Tilapia. Concentrations of Pb and Fe in Catfish were significantly higher (p〈0.05) than the WHO limits, while Zn and Cd were lower. Tissue concentrations of all the metals in Tilapia were however, within the WHO recommended limits. The concentrations in all the fish tissues were significantly higher (p〈0.05) than in the surrounding water. The observed values in Catfish indicate environmental threat to the health of the fish and indeed the humans that consume them and therefore calls for environmental surveillance in the area
    Beschreibung: Includes:- 3 tables.;1 fig.;7 refs.
    Schlagwort(e): Aquaculture ; Pollution ; Nigeria ; Calabar ; freshwater environment ; Heavy metals ; Tissues ; Pollution ; Pollution effects
    Repository-Name: AquaDocs
    Materialart: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 215-219
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  • 63
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    Effects of locust bean (Parkia bigtobosa) effluent on the histology of Clarias gariepinus juveniles (Burchell 1822) (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23448 | 19325 | 2018-05-02 08:37:49 | 23448 | Fisheries Society of Nigeria
    Details
    Publikationsdatum: 2021-07-14
    Beschreibung: The poor nature of most Agricultural processing practices in Nigeria have had adverse effect on our environment, and our aquatic resources are of no exception. This study was conducted to ascertain the median lethal concentration of the effluent within the 96 hours period and also to ascertain the extent of damage on some of the histological characteristics of the Clarias gariepinus juveniles. Juveniles of the Clarias gariepinus (mean weight 30g) were exposed to varied concentrations of the locust bean effluent under the standard laboratory conditions. Data on mortality corresponding to the various concentrations were subjected to the probit and logit transformations and used to calculate the LC50 graphically. The result shows the toxicity of the locust bean effluent to Clarias gariepinus juveniles as 0.089mg/L (treatment 4) during the period of study. Exposure to both the acute and subletheal concentrations resulted in a number of physiological dysfunction of the test fish. Observation of the fish under the tests revealed unbalanced swimming patterns loss of reflex, rapid opercular movements and gasping for air. Histopathological examination of the gill and liver of the treated fish showed signs of damage, ranging from Hypoxia, lesions, necrosis, fibrosis cell stasis and hyperplasia at the sublethal levels.
    Beschreibung: Includes:- 2 tables.;1 fig.;22 refs.
    Schlagwort(e): Fisheries ; Pollution ; Clarias gariepinus ; Nigeria ; Parkia bigtobosa ; freshwater environment ; Toxicity ; Lethal effects ; Pollution ; Histology
    Repository-Name: AquaDocs
    Materialart: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 189- 195
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  • 64
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    Policy and policy framework for growth of women's fisheries activities: accessing micro credit facilities for women in fisheries development as a fundamental human right (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23517 | 19325 | 2018-05-08 15:46:10 | 23517 | Fisheries Society of Nigeria
    Details
    Publikationsdatum: 2021-07-14
    Beschreibung: This paper begins with a review of policy issues on status of women’s fundamental human rights and the effects on their optimal participation in fisheries development. The focus of the paper is on the importance of women in fisheries activities within the fisheries industry. Issues pertaining to gender inequality in the rural communities affecting women in the fisheries sector, and solutions to overcome some of these issues are discussed. The degree of participation of women in the fisheries sector is an overall reflection of the cultures, the laws of the country and the priority given by the state to ensure gender equity. Generally, women in Nigeria, especially those from depressed fisheries households, participate actively in many fisheries activities, including aquaculture. However, the lower status accorded to women in many of the communities in Nigeria means that their contribution to fisheries is undervalued and unrecognized. Issues that need to be addressed with regards to participation of women in fisheries which include sensitivity to gender issues in fishery, improve living conditions, promote programs relating to women, reconsidering the practice of relating fishing rights to their right to speak and others are discussed in the paper The paper also looks at the possibilities of articulating measures in sensitizing the womenfolks through education, especially in knowing their fundamental human rights as specified by the UN’s articles, especially ability to access micro-credit in fisheries activities, the nature of loans and alternative strategies to tackle the problem of small-scale credit to women in fisheries development in the nation.
    Beschreibung: Includes:- 2 tables.;2 figs.;12 refs.
    Schlagwort(e): Fisheries ; Sociology ; Nigeria ; Ibeju Lekki ; freshwater environment ; Women ; Fishery policy ; Financial institutions ; Financial resources ; Financing
    Repository-Name: AquaDocs
    Materialart: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 602-612
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  • 65
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    Effect of different concentrations of bonny-light crude oil on alanine kinase and alanine transaminase enzyme activities in Heterobranchus bidorsalis juveniles (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/22998 | 19325 | 2018-03-05 20:41:44 | 22998 | Fisheries Society of Nigeria
    Details
    Publikationsdatum: 2021-07-12
    Beschreibung: The effect of exposing juveniles of Heterobranchus bidorsalis (Geoffroy St. Hilaire, 809) (mean weight: 15.02~c:0.14g) to different concentrations of Bonny-light crude oil (BLCO) on alanine kinase and alanine transaminase activities were studied. The exposure of the fish to 1.00, 2.00, 4.00, 8.001L-1 BLCO and a control (0.00m1 L-1) within 4 days toxicity and 42 days recovery periods indicated that the significant increases (P〈0.05; P〈0.01) in the serum alanine transaminase (HCAT) activities were dependent on the BLCO concentrations. The reduced SAK and (HCAK) activities noticed within the first 14 days recovery period implied that the removal of the oil pollutant probably lowered the pressure on the SAK and HCAK to participate in the metabolism of ingested carbohydrate. The significant increases in the serum alanine transminase (SAT) and the hepatic cytosolic alanine transminase (HCAT) activities in the fish corresponded with the trend shown by the SAK and HCAK activities. Generally, the increased activities of SAK, HCAK, SAT and HCAT in H. bodorsalis juveniles in this study might be due to a shift in the carbohydrate metabolism of the fish caused probably by the crude oil exposure.
    Beschreibung: Includes:- 3 tables.;31 refs.
    Schlagwort(e): Fisheries ; Health ; Pollution ; Heterobranchus bidorsalis ; Nigeria ; freshwater environment ; Crude oil ; Toxicity ; Fish ; Serum ; Serological studies ; Alanine ; Cytotoxicity
    Repository-Name: AquaDocs
    Materialart: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 159 - 166
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  • 66
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    Petroleum hydrocarbon contamination in seawater along the Western Coast of the Philippines (2021)
    Secretariat, Southeast Asian Fisheries Development Center | Bangkok, Thailand
    In:  http://aquaticcommons.org/id/eprint/26276 | 2002 | 2019-02-21 01:10:25 | 26276 | Southeast Asian Fisheries Development Center, Secretariat
    Details
    Publikationsdatum: 2021-07-24
    Beschreibung: A study on petroleum hydrocarbon concentrations in seawater from the South China Sea off the western coast of the Philippines was conducted during April to May 1998. The concentrations of dissolved/dispersed petroleum hydrocarbons (DDPH) in seawater samples were measured at 31 stations, using Ultraviolet Fluorescence (UVF) Spectroscopy technique. The DDPH concentrations were found to be in the range of 0.02 - 1.47 µg/l as chrysene equivalent, with an average of 0.25 µg/l. An attempt was made to compare between petroleum hydrocarbons in seawater samples from the near-shore area (8 stations) and the offshore area (23 stations). It was found that the DDPH concentrations of the near-shore stations were in the range of 0.03 - 0.47 µg/l, with an average of 0.12 µg/l, whereas the DDPH concentrations of the offshore stations were in the range of 0.02- 1.47 µg/l, with an average of 0.29 µg/l. However, the student’s t-test of the two data groups indicated that the two means were not significantly different at a = 0.05.
    Schlagwort(e): Environment ; Pollution ; Pollution monitoring ; Marine pollution ; Coastal waters ; Petroleum hydrocarbons ; South China Sea ; Philippines
    Repository-Name: AquaDocs
    Materialart: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 316-320
    Format: 5
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  • 67
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    Investigation of the socioeconomic activities and potentials of rural fisher folks in Oyan Lake Area (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/23051 | 19325 | 2018-03-06 15:29:28 | 23051 | Fisheries Society of Nigeria
    Details
    Publikationsdatum: 2021-07-12
    Beschreibung: An investigation of the socio-economic potential of the inhabitants living around Oyan lake (40km2 surface area) was carried out between January 2001 and August 2002. Five hundred (500) copies of the questionnaires were distributed among the people living around the entire stretch of the lake and 283 people responded. The commercial fish landing estimates showed that the total landing for the entire period of study was 4,628 (number) weighing 1,856.6kg. Mean catch per boat per sampling day (number and weight) was estimated to be 113 and 4.28kg respectively. Therefore the estimated annual fish landing (number and weight) per boat from 317 fishing days were 35,821 and 1,356.7kg respectively. The potential annual fish yield from commercial fishery for the lake was 147.5 tonnes while the total number of active boats recorded for the entire lake was 43,241.
    Beschreibung: Includes:- 1 table.;11 refs.
    Schlagwort(e): Fisheries ; Management ; Sociology ; Nigeria ; Oyan L. ; freshwater environment ; Socioeconomic aspects ; Financial management ; Investments ; Marketing
    Repository-Name: AquaDocs
    Materialart: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 331 - 334
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  • 68
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    Factors affecting changing livelihood strategies of artisanal fisherfolks in inland fishing communities in Delta State (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/23053 | 19325 | 2018-03-06 15:32:07 | 23053 | Fisheries Society of Nigeria
    Details
    Publikationsdatum: 2021-07-12
    Beschreibung: This study examined the factors affecting changing livelihood strategies of artisanal fisherfolks in inland fishing communities in Delta State, Nigeria. The sample size of 169 respondents was selected through a simple random sampling from a total of 935 fisherfolks in two selected Local Government Areas. Instrument for data collection was structured questionnaire. Data were analysed using descriptive and non parametric statistic. The result showed that majority (44%) of the respondents is between the ages of 41 and 60 years. There were no significant relationships between marital status, educational level, family size, income of fisherfolks and changing livelihood strategies (r= - 0.118, P = 0.05; r = -0.102, P = 0.05; r= -0.107, p 0.05; r = -0.107, P = 0.05) respectively. Correlation co-efficient analysis revealed that there was insignificant relationship between reasons for diversification of livelihood and changing livelihood strategies of the artisanal fisherfolks (r = 0.103, P = 0.184). In conclusion, the factors affecting livelihood strategies of artisanal fisherfolks include coping with insufficiency, income, obnoxious fishing method, government policy, resource depletion through sand bank, respondents ethnicity, age and sex. It is therefore recommended that greater emphasis should be directed towards provision of credit facilities. Fishing nets should also be subsidised by the government.
    Beschreibung: Includes:- 4 tables.;12 refs.
    Schlagwort(e): Fisheries ; Sociology ; Nigeria ; Delta State ; Livelihood ; Occupation ; freshwater environment ; Artisanal fishing
    Repository-Name: AquaDocs
    Materialart: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 348 - 353
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  • 69
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    Effect of environmental factors on coastal fisheries (2021)
    Fisheries Society of Nigeria | Zaria (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23305 | 19325 | 2018-03-30 15:13:13 | 23305 | Fisheries Society of Nigeria
    Details
    Publikationsdatum: 2021-07-14
    Beschreibung: Factors which threaten sustainable commercial fisheries are considered in this paper. Oil and grease, suspended solids, overfishing impact on fishes and fisheries. Whereas overfishing declines adult fish values; the duo of oil and suspended solids clog and disable gills of affected fishes and deplete insolation. And barnacles foul boats.
    Beschreibung: Includes:- 1 table.;13 refs.
    Schlagwort(e): Fisheries ; Health ; ASE ; Nigeria Coast ; freshwater environment ; Pollution ; Pollution effects ; Oil pollution
    Repository-Name: AquaDocs
    Materialart: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 133-135
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  • 70
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    Acute toxicity of galex to Oreochromis niloticus (Trewavas) in Nigeria (2021)
    Fisheries Society of Nigeria | Kaduna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23311 | 19325 | 2018-03-30 15:21:32 | 23311 | Fisheries Society of Nigeria
    Details
    Publikationsdatum: 2021-07-14
    Beschreibung: The acute toxicity of galex (Metolachlor) to fingerlings of Orechromis niloticus (Trewavas) was determined in 96hour static bioassays. During the assays, opercular ventilation and tail fin movement rates of the fish were determined. Haematological parameters of the blood and histopathology of the gills were observed. The 96hours LC50 of galex to fingerlings of O. niloticus was observed to be 9.30mgL-1~c 1.04. Histopathology of gills of the fish exposed to l100mgL -1, 1200mgL and 13..00mg/L-1 showed a dose-dependent disruption of the architecture of the lamellae and atrophy which led to impairment in oxygen uptake. Other symptoms of toxicosis in exposed fish include haemorrhage of the gills and fins, blood shot eyes of the fish, copious production of mucus on the body and head, agitated swimming, eruption of the ventral side and spilling out of the digestive system of fish, air gulping and death.
    Beschreibung: Includes:- 3 tables.;23 refs.
    Schlagwort(e): Fisheries ; Pollution ; Oreochromis niloticus ; Nigeria ; Zaria ; Galex ; freshwater environment ; Toxicants ; Toxicity ; Toxicity tests ; Pesticides ; Histopathology ; Haematology ; Biological stress
    Repository-Name: AquaDocs
    Materialart: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 159-164
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  • 71
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    The growth response of fingerlings of O. niloticus in sublethal test to paraquat (2021)
    Fisheries Society of Nigeria | Kaduna (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23316 | 19325 | 2018-03-30 15:28:47 | 23316 | Fisheries Society of Nigeria
    Details
    Publikationsdatum: 2021-07-14
    Beschreibung: The initial mean wet weight of the test fish were 7.64:~c 1.3 for the control and 6.33~c 0.9, 6.88~c 0.9 and 6.2~c 0.7 for the fish exposed to 1.02, 1.40 and 2.0mg/l of paraquat in water respectively. Growth was estimated from the sum of the individual wet weights of the fish at 2, 4, 6 and 8 weeks of exposure to the toxicant and expressed as percent Cumulative wet weight gain. The results showed that the cumulative percent wet weight gain in the control group increased from 10.34% at 1 week to 36.13% at 8 weeks. The growth of fish that were exposed to 1.02, 1.04 and 2.00mg/l increased from 3%, 0.44% and 1.55% at 1 week to 30.81 %, 9.59% and 19.81 % at week 8 respectively. A statistically significant difference in growth rate of the treated and control was observed (p〈0.05).
    Beschreibung: Includes:- 4 tables.;5 refs.
    Schlagwort(e): Aquaculture ; Pollution ; Oreochromis niloticus ; Nigeria ; Paraquat ; freshwater environment ; Fish culture ; Growth rate ; Growth ; Sublethal effects ; Toxicity
    Repository-Name: AquaDocs
    Materialart: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 181-184
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  • 72
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    Preliminary studies on the phytoremediation potential of Phragmites karka in Asa river (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23446 | 19325 | 2018-05-02 08:34:29 | 23446 | Fisheries Society of Nigeria
    Details
    Publikationsdatum: 2021-07-14
    Beschreibung: The ability of Phragmites karka to absorb and translocate the heavy metals Zinc,Copper,Cadmium and lead was investigated in Asa river, Ilorin Southwest Nigeria.The results of the translocation ability were in the order Cu〉Zn〉Cd and Pb. The bioconcentration factor for Zn,Cu,Cd and Pb in the root, stem and leaf had low values. Heavy metal accumulation in the roots were greater than those of the shoots. The quantities of accumulation in the roots were in the order Zn〉Cu〉Pb〉Cd. This study suggests that Phragmite karka is less suitable for sequestering of these studied heavy metals.
    Beschreibung: Includes:- 4 tables.;11 refs.
    Schlagwort(e): Limnology ; Pollution ; Phragmites karka ; Nigeria Asa R. ; freshwater environment ; Bioaccumulation ; Heavy metals ; Aquatic plants ; Pollution ; Bioassays
    Repository-Name: AquaDocs
    Materialart: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 181-184
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  • 73
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    Social structure of fish farmers in Osun State, South-West Nigeria (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23473 | 19325 | 2018-05-05 12:56:09 | 23473 | Fisheries Society of Nigeria
    Details
    Publikationsdatum: 2021-07-14
    Beschreibung: A survey of seventy-two selected fish farms in Osun State South-West Nigeria was carried out to determine the social status of the fish farmers. Structured questionnaires were used to collect information on age, educational background, marital status, mode of operation and type of culture embarked upon by the farmers among others. Data were analyzed using descriptive statistics. Results showed that most fish farmers (58.3%) in the state were male and were aged between 31-50 years old.91.7% of fish farmers were married and 95.8% had formal education. 63.9% adopted polyculture system. Tilapia and catfish were the two main species being cultured and 75% produced table fish while only 5.6% were involved in fish breeding. 83.3% practised fish farming on part-time basis and 66.7% were involved in non-agricultural occupation to supplement their production. 86.1% owned land either by inheritance or purchase, 8.3% operated on leased land and 5.6% rented the land upon which they operated. 75% of the respondents got their capital from personal savings, 11.1% from cooperatives, and only 5.6% had access to bank loans. 52.8% were regularly visited by extension agents 16.7% were occasionally visited while 30.5% were seldom visited. Only 27.8% belonged to farmers’ association.
    Beschreibung: Includes:- 2 tables.;1 fig.;10 refs.
    Schlagwort(e): Aquaculture ; Sociology ; Nigeria ; Osun State ; freshwater environment ; Fish culture ; Intensive culture ; Sociological aspects
    Repository-Name: AquaDocs
    Materialart: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 406-411
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  • 74
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    Socio-economic status of the fisherfolk of Yuna Adopted Village in Borgu Local Government Area, Niger State (2021)
    Fisheries Society of Nigeria | Lagos (Nigeria)
    In:  http://aquaticcommons.org/id/eprint/23474 | 19325 | 2018-05-05 12:58:18 | 23474 | Fisheries Society of Nigeria
    Details
    Publikationsdatum: 2021-07-14
    Beschreibung: The study was conducted to assess the socio-economic status of fisherfolks in Yuna Adopted Village Borgu Local Government Area of Niger State. One hundred respondents (65 male and 35 female) were purposively selected from four registered groups in the Village. Frequencies and Percentages were used to arrange, summarize and present the findings of this study. Majority of the male respondents fell within the range of 30-49 years, while female respondents range from 40-49 and 60-69 years. The distribution of respondents based on educational attainment shows that 92.3% male and 100% female had Quranic education. Majority of the respondents (both male and female) lives in mud with thatched roof houses and do not own radio and television. Similarly the highest proportion of male respondents generated mostly income of 〉N111,000 and N6,000 ? N10,000, while female respondents earned between N11,000 ? N30,000 and N6,000 ? N10,000 only. The technologies awareness by respondents include fish farming, V-bottom boat, Solar tent dryer and trammel net, only fish farming was adopted by respondents. The major constraints to Agricultural Production were identified and suggestion was made on how to overcome the constraints.
    Beschreibung: Includes:- 6 tables.;11 refs.
    Schlagwort(e): Fisheries ; Sociology ; Nigeria ; Yuna ; Fisherfolk ; Fishery Extention Services ; Extension Services ; freshwater environment ; Socioeconomic aspects ; Technology transfer ; Technology ; Fishermen ; Women
    Repository-Name: AquaDocs
    Materialart: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 412-418
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  • 75
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    Proceedings of the Third Technical Seminar on Marine Fishery Resources Survey in the South China Sea, Area III: Western Philippines, 13-15 July 1999 (2021)
    Secretariat, Southeast Asian Fisheries Development Center | Bangkok, Thailand
    In:  http://aquaticcommons.org/id/eprint/26278 | 2002 | 2019-03-01 06:39:00 | 26278 | Southeast Asian Fisheries Development Center, Secretariat
    Details
    Publikationsdatum: 2021-07-24
    Beschreibung: The Seminar presents an analysis of the results of the fisheries and oceanographic survey covering the waters of western Philippines, Area III, conducted during the period April-May 1998 by the M.V. SEAFDEC. A total of 23 papers are included in the following 4 sections: 1) Fisheries resources; 2) Fishery biology; 3) Primary production; and, 4) Fishery oceanography and marine pollution.
    Schlagwort(e): Fisheries ; Oceanography ; Pollution ; Marine fisheries ; Conferences ; Fishery surveys ; Fishery oceanography ; Fishery biology ; Fishery resources ; South China Sea ; Philippines
    Repository-Name: AquaDocs
    Materialart: book
    Format: application/pdf
    Format: application/pdf
    Format: 336
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  • 76
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    Toxicity of heavy metals to fish: an important consideration for sucessful aquaculture (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/23033 | 19325 | 2018-03-05 09:12:27 | 23033 | Fisheries Society of Nigeria
    Details
    Publikationsdatum: 2021-07-12
    Beschreibung: Heavy metals are toxic to man, animals and plants once safe limits are exceeded. Then ability to bio accumulate in plant and animal tissues makes them particularly hazardous. Heavy metals are toxic to all aquatic biota and cause high mortality of fish larva, fry, fingerling and adult fish. They accumulate in the gills, heart, liver, kidneys, brain, bones and muscles of fish. The physico-chemical forms of heavy metals determine their mobility, availability and toxicity to fish. These metals enter aquaculture systems through various means (polluted water, storage facilities, fish feed, atmospheric deposition, etc) and constitute a factor detrimental to successful aquaculture. This paper reviews the mode of entry, transport and toxicity of some selected heavy metals to freshwater fish. Methods for the determination of these metals in water, fish and sediment samples are also presented. Ways of preventing their entry into aquaculture systems together with the safe limits of concentration of these metals in aquaculture systems are also included.
    Beschreibung: Includes:- 2 tables.;23 refs.
    Schlagwort(e): Pollution ; Aquaculture ; Nigeria ; freshwater environment ; Heavy metals ; Toxicity ; Pollution effects ; Fish culture
    Repository-Name: AquaDocs
    Materialart: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 250 - 254
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  • 77
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    Role of women in inland fishing communities in Nigeria: a review (2021)
    Fisheries Society of Nigeria | Lagos
    In:  http://aquaticcommons.org/id/eprint/23066 | 19325 | 2018-03-10 14:34:46 | 23066 | Fisheries Society of Nigeria
    Details
    Publikationsdatum: 2021-07-12
    Beschreibung: The role of women in inland fishing communities in Nigeria have not been assessed or fully appreciated in the fishing industry in Nigeria. The role of women in the fisheries sub-sector is significant mainly in the post harvest activities such as sorting, preservation, processing, distribution and marketing of the fish products. The review highlights the fact that women not only make meaningful contribution to the socio-economic well-being of their households and the fishing but are also involved in other livelihood activities useful to their households and the community in which where they live. However, there are some constraints limiting women's involvement in fisheries and these range from socio-cultural, psychological to economic factors. It was therefore recommended that extension programmes on development issues should focus extensively on the post-harvest and livelihood activities in which women in inland fishing communities are mostly involved.
    Beschreibung: Includes:- 12 refs.
    Schlagwort(e): Fisheries ; Sociology ; Nigeria ; Women in Fisheries ; freshwater environment ; Women ; Fisheries
    Repository-Name: AquaDocs
    Materialart: conference_item , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 406 - 408
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    Oil pollution in the Vietnamese waters (2021)
    Secretariat, Southeast Asian Fisheries Development Center | Bangkok, Thailand
    In:  http://aquaticcommons.org/id/eprint/26396 | 23782 | 2019-04-08 07:33:40 | 26396 | Southeast Asian Fisheries Development Center, Secretariat
    Details
    Publikationsdatum: 2021-07-24
    Beschreibung: Enumeration of hydrocarbon-degrading microorganisms (HDM) and their degradative capacity studies were carried out in area IV of South China Sea (Vietnamese water). Microbial most probable number (MPN) varied from 101 to 105 cell/ ml of surface seawater or gram of sediment. Some microbial communities and bacterial strains isolated from 97 collected samples show high hydrocarbon degradation and surfactant producing abilities. Preliminary results of our microbial study indicated that oil pollution in IV area was not found in 30 research stations. Slight oil contamination was observed in 28 survey stations.
    Schlagwort(e): Oceanography ; Pollution ; Pollution monitoring ; Marine pollution ; Microbiology ; Microorganisms ; Aromatic hydrocarbons ; Oil pollution ; Viet Nam
    Repository-Name: AquaDocs
    Materialart: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 422-428
    Format: 7
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    Aquaculture Asia, Vol. 10, No. 4, pp.1-42, October-December 2005 (2021)
    Network of Aquaculture Centres in Asia-Pacific | Bangkok, Thailand
    In:  http://aquaticcommons.org/id/eprint/1435 | 6 | 2011-09-29 20:37:03 | 1435 | Network of Aquaculture Centres in Asia-Pacific
    Details
    Publikationsdatum: 2021-07-08
    Beschreibung: *Table of Contents* Sustainable aquaculturePeter Edwards writes on rural aquaculture: Small-scale pond culture in Bangladesh. People in aquacultureCommunity based aquaculture - issues and challenges H.K. De and G.S. Saha.Aquaculture as an action programme: An exercise in building confidence and self worth.B. Shanthi, V.S. Chandrasekaran, M. Kailasam, M. Muralidar, T. Ravisankar,.C. Saradad and M. KrishnanThe STREAM Column: Transforming policy recommendations into pro-poor service provisionGraham Haylor.Research & farming techniques.Grow out of juvenile spotted Babylon to marketable size in earthen ponds II: Polyculture with seabass.S. Kritsanapuntu, N. Chaitanawisuti, W. Santhaweesuk and Y. NatsukariAsia-Pacific Marine Finfish Aquaculture Network.Influence of economic conditions of importing nations and unforeseen global events on grouper markets.Sih Yang Sim.Present status of hatchery technology for cobia in Vietnam. Nhu Van Can.Report on grouper hatchery training course in Indonesia.Nguyen Quoc Thai.Aquatic animal health.Biosecured and improved penaeid shrimp production through organic nursery raceway system in India.Felix. S. and M. Samaya Kannan.Management of monogenean parasites in brackishwater finfish.K.P. Jithendran, M. Natarajan and I.S. Azad.Vembanad Lake: A potential spawner bank of the giant freshwater prawn Macrobrachium rosenbergii on the southwest coast of India.Paramaraj Balamurugan, Pitchaimuthu Mariappan & Chellam Balasundaram.
    Beschreibung: ISSN: 0859-600X
    Schlagwort(e): Aquaculture ; Sociology ; India ; Lake Vembanad ; Macrobrachium rosenbergii ; spotted Babylon ; Bangladesh ; Seabass ; Grouper ; Cobia ; Vietnam ; Indonesia
    Repository-Name: AquaDocs
    Materialart: monograph
    Format: application/pdf
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  • 80
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    Facilitated advocacy: supporting farmers to have a voice in policy making and the development of service provision (2021)
    Support to Regional Aquatic Resources Management (STREAM) | Bangkok, Thailand
    In:  http://aquaticcommons.org/id/eprint/1572 | 6 | 2011-09-29 20:23:43 | 1572 | Support to Regional Aquatic Resources Management
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    Publikationsdatum: 2021-07-09
    Beschreibung: Listening to people, especially those who are poor, and involving them in policy making and decisions about service delivery processes are logical steps in building better services and improving policies aimed at poverty alleviation. This case describes a facilitated advocacythat helped to negotiate and support a role for poor people who farm and fish, to contribute recommendations for changes in services and policies that impact on their lives. The national Government of India’s Department of Animal Husbandry and Dairying and the Indian Council for Agricultural Research, both in the capital Delhi, have been linking with farmers and fishers and state government officials in the eastern states of Jharkhand, Orissa and West Bengal, in partnership with the STREAM Initiative of the intergovernmental Network of Aquaculture Centers in Asia Pacific and with the support of the UK GovernmentDepartment for International Development, Natural resources Systems Program supporting farmers to have a voice(13 p.)
    Beschreibung: STREAM Initiative was hosted by the Network of Aquaculture Centres in Asia-Pacific (NACA), Bangkok.
    Schlagwort(e): Aquaculture ; Sociology ; Information Management ; India ; Jharkhand ; Orissa ; West Bengal
    Repository-Name: AquaDocs
    Materialart: monograph
    Format: application/pdf
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    STREAM Journal, Vol. 1, No. 1, pp. 1-12. January-March 2002 (2021)
    Support to Regional Aquatic Resources Management (STREAM) | Bangkok, Thailand
    In:  http://aquaticcommons.org/id/eprint/1586 | 6 | 2011-09-29 20:24:25 | 1586 | Support to Regional Aquatic Resources Management
    Details
    Publikationsdatum: 2021-07-09
    Beschreibung: CONTENTS: Learning from each other about conflict, by Ronet Santos. E-learning to support knowledge sharing in aquatic resources, by Robert T. Raab and Jonathan Woods. Livelihood strategies, gender and participation in aquaculture: findings from participatory research in northwestern Sri Lanka, by Lindsay J. Pollock and David C. Little. Farming of giant tiger shrimp in northern central Vietnam, by Jesper Clausen. Interacting with stakeholders and policy-makers, by To Phuc Tuong. The role of nutrition communications in meeting the nutritional challenges of the Asia-Pacific region, by Georgina Cairns. (PDF has 16 pages.)
    Schlagwort(e): Education ; Sociology ; Aquaculture ; Sri Lanka ; Vietnam ; Asia-Pacific
    Repository-Name: AquaDocs
    Materialart: monograph
    Format: application/pdf
    Format: application/pdf
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  • 82
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    STREAM Journal, Vol. 2, No. 2, pp 1-19. April-June 2003 (2021)
    Support to Regional Aquatic Resources Management (STREAM) | Bangkok, Thailand
    In:  http://aquaticcommons.org/id/eprint/1643 | 6 | 2011-09-29 20:15:44 | 1643 | Support to Regional Aquatic Resources Management
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    Publikationsdatum: 2021-07-09
    Beschreibung: CONTENTS: Livelihoods and languages: a SPARK-STREAM learning and communications process, by Kath Copley and William Savage. Towards broader contextual understandings of livelihoods, by Elizabeth M. Gonzales, Nguyen Song Ha, Rubu Mukherjee, Nilkanth Pokhrel and Sem Viryak. Using tools to build shared understandings, using a sustainable livelihoods framework to learn, byNuchjaree Langkulsane. Learning about rattan as a livelihood, by Mariel de Jesus and Christine Bantug. Meanings of “community-managed area,” by Arif Aliadi. Lessons learnt about processes for learning and communicating, by Graham Haylor and Ronet Santos.
    Beschreibung: The STREAM Initiative was hosted at the Network of Aquaculture Centres (NACA) in Bangkok (Thailand)
    Schlagwort(e): Sociology ; Aquaculture ; Thailand ; Philippines ; Indonesia
    Repository-Name: AquaDocs
    Materialart: monograph
    Format: application/pdf
    Format: application/pdf
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  • 83
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    STREAM Journal, Vol. 2, No. 3, pp 1-18. July-September 2003 (2021)
    Support to Regional Aquatic Resources Management (STREAM) | Bangkok, Thailand
    In:  http://aquaticcommons.org/id/eprint/1644 | 6 | 2011-09-29 20:14:34 | 1644 | Support to Regional Aquatic Resources Management
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    Publikationsdatum: 2021-07-09
    Beschreibung: CONTENTS: Livelihood Improvements through fisheries in the Pode community in Pokhara, Nepal, by Tek Bahadur Gurung and Jay Dev Bista. Women’s participation in coastal resources management and livelihoods in Khanh Hoa Province, Vietnam, by Nguyen Thu Hue, Than Thi Hien, Pham Thi Phuong Hoa, Nguyen Viet Vinh and Dao Viet Long. Supporting people’s efforts and interactions in coastal resources management in Indonesia, by Tabitha Yulita. Planning for a community fisheries M&E system, by Heather Airlie and Haiko Meelis. Identifying needs and recommendations for efficient stakeholder communications through an information access survey, by Elizabeth M. Gonzales, Malene Felsing and Erwin L Pador. IEC seminar-workshop in support of fisheries ordinance implementation in Roxas City, Philippines, by Belinda M. Garrido and Elizabeth M. Gonzales.
    Beschreibung: The STREAM Initiative was hosted at the Network of Aquaculture Centres (NACA) in Bangkok (Thailand)
    Schlagwort(e): Fisheries ; Sociology ; Aquaculture ; Information Management ; Pokhara ; Nepal ; Khanh Hoa Province ; Vietnam ; Indonesia ; Roxas City ; Philippines ; Cambodia
    Repository-Name: AquaDocs
    Materialart: monograph
    Format: application/pdf
    Format: application/pdf
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  • 84
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    STREAM Journal, Vol. 3, No. 1, pp 1-18. January-March 2004 (2021)
    Support to Regional Aquatic Resources Management (STREAM) | Bangkok, Thailand
    In:  http://aquaticcommons.org/id/eprint/1662 | 6 | 2011-09-29 20:13:16 | 1662 | Support to Regional Aquatic Resources Management
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    Publikationsdatum: 2021-07-09
    Beschreibung: CONTENTS: Creating understanding and ownership of collaborative research results through ‘learning by doing,’ by Robert Arthur and Caroline Garaway. Fish culture, farming, markets and promotion: an integrated, sustainable approach to aquaculture and rural development, by Pen Rotha and Brendan Boucher. Fisheries policy reform impact assessment in Cambodia: understanding policy and poor people, by Philip Townsley and Sem Viryak. “Shrimp Hero” Phan The Phuong, by Ngo Minh Khoi. Coral farming in Vietnam, by Nguyen Viet Vinh. The global fisheries market: can rural poor people benefit? Issues raised by STREAM Media Monitoring Reports, by Paul Bulcock.
    Beschreibung: The STREAM Initiative was hosted at the Network of Aquaculture Centres (NACA) in Bangkok (Thailand)
    Schlagwort(e): Fisheries ; Aquaculture ; Sociology ; Cambodia ; Vietnam ; Lao PDR
    Repository-Name: AquaDocs
    Materialart: monograph
    Format: application/pdf
    Format: application/pdf
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  • 85
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    STREAM Journal, Vol. 3, No. 2, pp 1-17. April-June 2004 (2021)
    Support to Regional Aquatic Resources Management (STREAM) | Bangkok, Thailand
    In:  http://aquaticcommons.org/id/eprint/1663 | 6 | 2011-09-29 20:13:19 | 1663 | Support to Regional Aquatic Resources Management
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    Publikationsdatum: 2021-07-09
    Beschreibung: CONTENTS: BFAR moves on in Region 6, by Janice N. Tronco. Livelihoods initiatives in Sapian Bay, by Tee-Jay A. San Diego. Improving access to information through Barangay Learning Resource Centers, by Elizabeth M. Gonzales. The Philippines Fisheries Information System, by Agnes C. Solis. The contributions of planning activities in the participatory process, by Rommel P. Guarin. Inter-LGU alliance building: a key to sustaining the Integrated Fisheries and Aquatic Resource Management Council (IFARMC), by Josephine P. Savaris.
    Beschreibung: The STREAM Initiative was hosted at the Network of Aquaculture Centres (NACA) in Bangkok (Thailand)
    Schlagwort(e): Aquaculture ; Sociology ; Information Management ; Western Visayas ; Phillipines
    Repository-Name: AquaDocs
    Materialart: monograph
    Format: application/pdf
    Format: application/pdf
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  • 86
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    STREAM Journal, Vol. 2, No. 4, pp 1-18. October-December 2003 (2021)
    Support to Regional Aquatic Resources Management (STREAM) | Bangkok, Thailand
    In:  http://aquaticcommons.org/id/eprint/1661 | 6 | 2011-09-29 20:13:13 | 1661 | Support to Regional Aquatic Resources Management
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    Publikationsdatum: 2021-07-09
    Beschreibung: CONTENTS: An experience with group formation in Jabarrah, West Bengal, by Amar Prasad, Virendra Singh, Binay Sahay and Gautum Dutta. Aquaculture self-help groups in rural West Bengal, by Satyendra Tripathi, Graham Haylor and William Savage in consultation with Jagdish Gangwar, Virendra Singh, Gautam Dutta and Prabhat Pathak. Lessons learned for Fulwar Toli from an exposure visit to JabarrahBhim Nayak and Rubu Mukherjee. Livelihood intervention by Fish Farmers Development Agency: a success story from Mayurbhanj, Orissa, by G.B. Parida. Understanding of assets-based livelihoods through participatory rural appraisal to eliminate hunger, by Binay Sahay. Poverty ranking tools in PRA: experiences of EIRFP in addressing vulnerability, by Binay Sahay.
    Beschreibung: The STREAM Initiative was hosted at the Network of Aquaculture Centres (NACA) in Bangkok (Thailand)
    Schlagwort(e): Sociology ; Aquaculture ; Jabarrah ; Fulwar Toli ; Purulia District ; Mayurbhanj District ; Jharkhand ; Orissa ; West Bengal ; India
    Repository-Name: AquaDocs
    Materialart: monograph
    Format: application/pdf
    Format: application/pdf
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  • 87
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    STREAM Journal, Vol. 3, No. 4, pp 1-17. October-December 2004 (2021)
    Support to Regional Aquatic Resources Management (STREAM) | Bangkok, Thailand
    In:  http://aquaticcommons.org/id/eprint/1702 | 6 | 2011-09-29 20:06:12 | 1702 | Support to Regional Aquatic Resources Management
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    Publikationsdatum: 2021-07-09
    Beschreibung: CONTENTS: Pasoso project: local livelihoods and turtle conservation in a small island MPA in central Sulawesi, Indonesia, by Abigail Moore. Fisheries development in Lao PDR, by Khamphet Roger. Creating better fisher livelihoods through leasable fisheries, by Khin Maung Soe. The Jankar system for sustainable livelihoods: lessons from the EIRFP, by Binay Kumar Sahay. Alternative livelihoods for landlocked areas in BFAR Region 6, by Jacqueline T. Mamburam. Lessons learned and future replication from Trao reef locally managed marine reserve, by Than Thi Hien.
    Beschreibung: The STREAM Initiative was hosted at the Network of Aquaculture Centres in Asia-Pacific (NACA) in Bangkok (Thailand)
    Schlagwort(e): Fisheries ; Aquaculture ; Sociology ; Pulau Pasoso ; Sulawesi ; Indonesia ; Myanmar ; Jharkhand ; Orissa ; West Bengal ; India ; Lao PDR ; Philippines ; Vietnam ; turtles
    Repository-Name: AquaDocs
    Materialart: monograph
    Format: application/pdf
    Format: application/pdf
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  • 88
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    STREAM Journal, Vol. 4, No. 1, pp 1-17. January-March 2005 (2021)
    Support to Regional Aquatic Resources Management (STREAM) | Bangkok, Thailand
    In:  http://aquaticcommons.org/id/eprint/1703 | 6 | 2011-09-29 20:06:16 | 1703 | Support to Regional Aquatic Resources Management
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    Publikationsdatum: 2021-07-09
    Beschreibung: CONTENTS: Young people taking bolder steps, by Josephine P. Savaris. Providing a venue for voices to be heard, by Elizabeth M. Gonzales and Josephine Savaris. Rehabilitation of Bundu Pond: STREAM’s Initiative and DoF’s Action, by Bhim Nayak and Ashish Kumar. Coastal resources utilization and conservation issues in Cox’s Bazar, Bangladesh, by M.K. Abu Hena, H. Sharifuzzaman, M.S. Aftabuddin and M.N. Haque. People, fish and reefs: a livelihoods learning curve, by Abigail Moore. Understanding the marine ornamental trade and its impact on the livelihoods of poor stakeholders in the Philippines, by Elizabeth M. Gonzales.
    Beschreibung: The STREAM Initiative was hosted at the Network of Aquaculture Centres in Asia-Pacific (NACA) in Bangkok (Thailand)
    Schlagwort(e): Fisheries ; Aquaculture ; Sociology ; Banggai Islands ; Indonesia ; Jharkhand State ; India ; Leyte ; Philippines ; Cox’s Bazar District ; Bangladesh
    Repository-Name: AquaDocs
    Materialart: monograph
    Format: application/pdf
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  • 89
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    STREAM Journal, Vol. 3, No. 3, pp 1-17. July-September 2004 (2021)
    Support to Regional Aquatic Resources Management (STREAM) | Bangkok, Thailand
    In:  http://aquaticcommons.org/id/eprint/1701 | 6 | 2011-09-29 20:06:10 | 1701 | Support to Regional Aquatic Resources Management
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    Publikationsdatum: 2021-07-09
    Beschreibung: CONTENTS: What do we need to learn about to understand how people live, by Kath Copley and William Savage. Taking steps to making livelihoods work, by Erwin L. Pador. Reflections on the India-Nepal Workshop, by Rubu Mukherjee and Nilkanth Pokhrel. Reflections on the role of livelihoods approaches and analysis in Lao PDR, by Phanthavong Vongsamphanh and Graham Haylor. After the Workshop on Livelihoods Approaches and Analysis, by Khin Maung Soe, Aye Aye Zaw, Nilar Kyawe and Myant Thar Htun. The relevance of livelihoods approaches in Yunnan, China, by Susan Li and William Savage
    Beschreibung: The STREAM Initiative was hosted at the Network of Aquaculture Centres in Asia-Pacific (NACA) in Bangkok (Thailand)
    Schlagwort(e): Sociology ; Aquaculture ; India ; Nepal ; Lao PDR ; Yunnan ; China ; Philippines ; Myanmar
    Repository-Name: AquaDocs
    Materialart: monograph
    Format: application/pdf
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  • 90
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    STREAM Journal, Vol. 5, No. 1, pp 1-18. January-March 2006 (2021)
    Support to Regional Aquatic Resources Management (STREAM) | Bangkok, Thailand
    In:  http://aquaticcommons.org/id/eprint/1720 | 6 | 2011-09-29 20:08:10 | 1720 | Support to Regional Aquatic Resources Management
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    Publikationsdatum: 2021-07-09
    Beschreibung: CONTENTS: Policy development as a theme and policy briefs as a genre, by Graham Haylor and William Savage. Decriminalizing Cambodian family-scale fishers through a livelihoods approach to law reform, by Nao Thuok and Chun Sopha. Longer pond leases in Orissa, by Reshmee Guha and Rubu Mukherjee. One-stop aqua shop: a “one-window delivery” service center for aqua-farmers and fishers, by S.D. Tripathi, Rubu Mukherjee and Kuddus Ansary. Fisheries and aquaculture policy formulation process in Pakistan, by Muhammad Junaid Wattoo and Dr. Muhammad Hayat. Improving the international marine ornamental fish trade to sustain and improve the livelihoods of poor people involved in the trade, by Aniza Suspita, Michael J. Phillips and Samliok Ndobe.
    Beschreibung: The STREAM Initiative was hosted at the Network of Aquaculture Centres in Asia-Pacific (NACA) in Bangkok (Thailand)
    Schlagwort(e): Fisheries ; Aquaculture ; Sociology ; Cambodia ; Indonesia ; Orissa ; India ; Pakistan
    Repository-Name: AquaDocs
    Materialart: monograph
    Format: application/pdf
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  • 91
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    STREAM Journal, Vol. 5, No. 2, pp 1-17. April-June 2006 (2021)
    Support to Regional Aquatic Resources Management (STREAM) | Bangkok, Thailand
    In:  http://aquaticcommons.org/id/eprint/1722 | 6 | 2011-09-29 20:08:12 | 1722 | Support to Regional Aquatic Resources Management
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    Publikationsdatum: 2021-07-09
    Beschreibung: CONTENTS: First one-stop aqua shop in Pakistan, by Syed Nadeem Sharib and Muhammad Junaid Wattoo. Dad Karim: a fisherman of Gwadar, by Abdul Rahim. Learning to fish in the deep sea of Sindh Province, by Muhammad Alam. Freshwater prawn fishery of Pakistan, by Muhammad Yaqoob. Cephalopod fishery: a local technique to catch cuttlefish in the coastal waters of Pakistan, by Shabir Ali Amir. Grouper culture in Pakistan, by S. Makhdoom Hussain and Zakia Khatoon.
    Beschreibung: The STREAM Initiative was hosted at the Network of Aquaculture Centres in Asia-Pacific (NACA) in Bangkok (Thailand)
    Schlagwort(e): Fisheries ; Aquaculture ; Sociology ; Pakistan ; Freshwater prawns ; Cephalopods ; Cuttlefish ; Grouper
    Repository-Name: AquaDocs
    Materialart: monograph
    Format: application/pdf
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  • 92
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    STREAM Journal, Vol. 5, No. 3, pp 1-18. July-September 2006 (2021)
    Support to Regional Aquatic Resources Management (STREAM) | Bangkok, Thailand
    In:  http://aquaticcommons.org/id/eprint/1723 | 6 | 2011-09-29 20:08:14 | 1723 | Support to Regional Aquatic Resources Management
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    Publikationsdatum: 2021-07-10
    Beschreibung: CONTENTS: Impacts of the fisheries policy reform on livelihoods in Cambodia, by Chun Sophat and Mitchell Isaacs. A success story about aquaculture in India, by Shri Prameswar Bhoi. Two stories from Nepal: fisherman becomes a rich fish farmer, women’s empowerment through aquaculture, by Rjendra Yadav, Rabindra Man Malla. A positive change in perceptions in Pakistan, by Cecile Brugere. Small details that matter: a story from the Philippines, by Rommel Guarin. A Vietnamese farmer managing aquaculture and capture in a reservoir, by Nguyen Van Lung.
    Beschreibung: The STREAM Initiative was hosted at the Network of Aquaculture Centres in Asia-Pacific (NACA) in Bangkok (Thailand)
    Schlagwort(e): Fisheries ; Aquaculture ; Sociology ; Cambodia ; India ; Nepal ; Pakistan ; Philippines ; Vietnam
    Repository-Name: AquaDocs
    Materialart: monograph
    Format: application/pdf
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  • 93
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    STREAM Journal, Vol. 4, No. 4, pp 1-17. October-December 2005 (2021)
    Support to Regional Aquatic Resources Management (STREAM) | Bangkok, Thailand
    In:  http://aquaticcommons.org/id/eprint/1719 | 6 | 2011-09-29 20:08:08 | 1719 | Support to Regional Aquatic Resources Management
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    Publikationsdatum: 2021-07-09
    Beschreibung: CONTENTS: Seaweed culture and farmer incomes in Bekasi, Indonesia, by A. Mauksit L. Maala and Aniza Suspita. Significant change for a self-help group, by Nguyen Song Ha. Conflict over fishing in Jharkhand, by Ashish Kumar. Two worlds across a highway, by William Savage. Critical steps in preparing coastal communities for effective policy changes, by Josephine P. Savaris. New guidelines on data collection and iniormation sharing for co-management, by Charlotte Howard.
    Beschreibung: The STREAM Initiative was hosted at the Network of Aquaculture Centres in Asia-Pacific (NACA) in Bangkok (Thailand)
    Schlagwort(e): Fisheries ; Aquaculture ; Sociology ; Bekasi District ; Indonesia ; Jharkhand ; India ; Vietnam ; Pakistan ; Visayas ; Philippines ; Seaweed
    Repository-Name: AquaDocs
    Materialart: monograph
    Format: application/pdf
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  • 94
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    STREAM Journal, Vol. 5, No. 4, pp 1-18. October-December 2006 (2021)
    Support to Regional Aquatic Resources Management (STREAM) | Bangkok, Thailand
    In:  http://aquaticcommons.org/id/eprint/1724 | 6 | 2011-09-29 20:08:17 | 1724 | Support to Regional Aquatic Resources Management
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    Publikationsdatum: 2021-07-10
    Beschreibung: CONTENTS: Success story of one-stop aqua shop in Kaipara Village, by Kuddus Ansary. Enhancement of people’s livelihoods in Kompong Kra Sang community fishery, by Chun Sophat. Char livelihoods of the old Brahmaputra River in Bangladesh, by Nesar Ahmed. Fin fish community structure as a measure of ecological degradation in two tropical rivers of India, by D. Chakrabarty and S.K. Das. Penaeid shrimp fisheries of Pakistan, by Razia Sultana. Reviving the shrimp industry in Capiz, by Jessica C. Esmao.
    Beschreibung: The STREAM Initiative was hosted at the Network of Aquaculture Centres in Asia-Pacific (NACA) in Bangkok (Thailand)
    Schlagwort(e): Fisheries ; Aquaculture ; Sociology ; Cambodia ; India ; Pakistan ; Bangladesh ; Shrimp
    Repository-Name: AquaDocs
    Materialart: monograph
    Format: application/pdf
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  • 95
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    STREAM Journal, Vol. 4, No. 3, pp 1-19. July-September 2005 (2021)
    Support to Regional Aquatic Resources Management (STREAM) | Bangkok, Thailand
    In:  http://aquaticcommons.org/id/eprint/1718 | 6 | 2011-09-29 20:07:47 | 1718 | Support to Regional Aquatic Resources Management
    Details
    Publikationsdatum: 2021-07-09
    Beschreibung: CONTENTS: One-stop Aqua Shops: an emerging phenomenon in Eastern India, by Graham Haylor, Rubu Mukerjee and S.D. Tripathi. Ranchi One-stop Aqua Shop, by Ashish Kumar. Kaipara One-stop Aqua Shop, by Kuddus Ansary. Bilenjore One-stop Aqua Shop, by Bhawani Sankar Panda. Patnagarh One-stop Aqua Shop, by Dipti Behera and Lingraj Otta. Using bar-coding in a One-stop Aqua Shop, by Christopher Keating.
    Beschreibung: The STREAM Initiative was hosted at the Network of Aquaculture Centres in Asia-Pacific (NACA) in Bangkok (Thailand)
    Schlagwort(e): Sociology ; Aquaculture ; Jharkhand ; Orissa ; West Bengal ; India
    Repository-Name: AquaDocs
    Materialart: monograph
    Format: application/pdf
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    STREAM Journal, Vol. 4, No. 2, pp 1-17. April-June 2005 (2021)
    Support to Regional Aquatic Resources Management (STREAM) | Bangkok, Thailand
    In:  http://aquaticcommons.org/id/eprint/1717 | 6 | 2011-09-29 20:07:43 | 1717 | Support to Regional Aquatic Resources Management
    Details
    Publikationsdatum: 2021-07-09
    Beschreibung: CONTENTS: Changes in Jabarrah, by Satyendra D. Tripathi, as told by Thanda Mahato. Palu Hijau in the Banggai Islands Jabarrah: using knowledge for change, by Akhdary Dj Supu, translated by Abigail Moore. Banggai Islands case study: building foundations for action, by Samliok Ndobe, translated by Abigail Moore. Three stories from Nepal, by Ghanshayam Poudel, Suraj, Ramesh Gautam, Pashupati Chaudhary, Anil Subedi, Muralidhar Mishara and Chet Nath Adhikari. Me and my work, by Sheryll Alcazar. Livelihoods approaches: skills learned, applied and shared, by Monica Piquero-Tan.
    Beschreibung: The STREAM Initiative was hosted at the Network of Aquaculture Centres in Asia-Pacific (NACA) in Bangkok (Thailand)
    Schlagwort(e): Fisheries ; Aquaculture ; Sociology ; Purulia District ; West Bengal ; India ; Banggai Islands ; Central Sulawesi ; Indonesia ; Nepal ; Philippines
    Repository-Name: AquaDocs
    Materialart: monograph
    Format: application/pdf
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  • 97
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    STREAM Journal, Vol. 6, No. 1, pp 1-21. Jan-March 2007 (2021)
    Support to Regional Aquatic Resources Management (STREAM) | Bangkok, Thailand
    In:  http://aquaticcommons.org/id/eprint/1725 | 6 | 2011-09-29 20:08:19 | 1725 | Support to Regional Aquatic Resources Management
    Details
    Publikationsdatum: 2021-07-10
    Beschreibung: CONTENTS: Approaches to understanding pond-dike systems in Asia: the POND-LIVE project approach, by Dave Little, Marc Verdegem and Roel Bosma. The contribution of fish ponds to nutrient cycling in integrated farming systems, by P.N. Muendo, J.J. Stoorvogel and Marc Verdegem. Improving the contribution of fishfarming to livelihoods in Northeast Thailand, by Chittra Arjinkit, Roel Bosma, Danai Turongrouang. Benefits of pond-dike systems in Bangladesh, by M.S. Kabir, M.A. Wahab and Marc Verdegem. Common carp increases rohu production in farmers ponds, by Mohammad Mustafizur Rahman, Md. Abdul Wahab and Marc C.J. Verdegem. Improving pond-dike farming systems in the Mekong delta, Vietnam; the Can Tho approach, by Dang Kieu Nhan, Le Thanh Duong, Le Thanh Phong, Roel H. Bosma and Marc C.J. Verdegem. Fuzzy pathways for farm development in Vietnam, by Roel H. Bosma, Le Thanh Phong, and Dang Kieu Nhan.
    Beschreibung: The STREAM Initiative was hosted at the Network of Aquaculture Centres in Asia-Pacific (NACA) in Bangkok (Thailand)
    Schlagwort(e): Fisheries ; Aquaculture ; Sociology ; Asia ; Egypt ; Thailand ; Bangladesh ; India ; Vietnam
    Repository-Name: AquaDocs
    Materialart: monograph
    Format: application/pdf
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  • 98
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    Aquatic resources in the Philippines and the extent of poverty in the sector (2021)
    Support to Regional Aquatic Resources Management (STREAM) | Bangkok, Thailand
    In:  http://aquaticcommons.org/id/eprint/2333 | 424 | 2011-09-29 19:15:05 | 2333 | Support to Regional Aquatic Resources Management
    Details
    Publikationsdatum: 2021-07-13
    Beschreibung: This report presents an overview of the state of aquatic resources in the Philippines, its performance and importance in the Philippine economy, and explores the situation of poverty in the "aquatic resources sector." The report describes the policy environment that guides the action of key actors in the sector.The report also provides a general analysis of some trends in relation to factors that keep the poor from participating and benefiting from aquatic resource management, based on the perspectives of the authors. (PDF contains 135 pages)
    Beschreibung: The STREAM Initiative was hosted at the Network of Aquaculture Centres in Asia-Pacific (NACA) in Bangkok (Thailand)
    Schlagwort(e): Fisheries ; Sociology ; Philippines ; Voluntary Service Overseas (VSO)
    Repository-Name: AquaDocs
    Materialart: monograph
    Format: application/pdf
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  • 99
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    A livelihoods study of farmers and fishers in Dang Tong Village Kampong Chhnang Province (2021)
    Support to Regional Aquatic Resources Management (STREAM) | Bangkok, Thailand
    In:  http://aquaticcommons.org/id/eprint/2327 | 424 | 2011-09-29 19:15:56 | 2327 | Support to Regional Aquatic Resources Management
    Details
    Publikationsdatum: 2021-07-13
    Beschreibung: This is the report of a livelihoods study team working together with villagers from Dang Tong Village in Kampong Chhnang Province, Cambodia. The study of the livelihoods of farmers and fishers is based on information provided by the villagers of Dang Tong, who shared their knowledge and raised real problems related to their livelihoods. [PDF contains 37 pages.]
    Beschreibung: The STREAM Initiative was hosted at the Network of Aquaculture Centres in Asia-Pacific (NACA) in Bangkok (Thailand)
    Schlagwort(e): Fisheries ; Sociology ; Agriculture ; Cambodia ; Dang Tong ; Kampong Chhnang
    Repository-Name: AquaDocs
    Materialart: monograph
    Format: application/pdf
    Format: application/pdf
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    STREAM Country Strategy Paper: Sri Lanka (2021)
    Support to Regional Aquatic Resources Management (STREAM) | Bangkok, Thailand
    In:  http://aquaticcommons.org/id/eprint/2396 | 424 | 2011-09-29 19:09:00 | 2396 | Support to Regional Aquatic Resources Management
    Details
    Publikationsdatum: 2021-07-13
    Beschreibung: In Sri Lanka the incidence of poverty varies among regions and livelihoods; aquatic resources users represent a poor category in many regions and therefore a vulnerable group. In December 2004 the country was hit by a Tsunami originating off the coast of Aceh in Indonesia, which affected the livelihoods of a large section of coastal aquatic resource users. The country is currently engaged in a major humanitarian effort to improve the livelihoods of aquatic resources users through various donor-funded projects. (PDF contains 18 pages)
    Beschreibung: The STREAM Initiative was hosted at the Network of Aquaculture Centres in Asia-Pacific (NACA) in Bangkok (Thailand)
    Schlagwort(e): Sociology ; Planning ; Sri Lanka
    Repository-Name: AquaDocs
    Materialart: monograph
    Format: application/pdf
    Format: application/pdf
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