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  • Biology  (273)
  • 2020-2024
  • 2020-2022  (273)
  • 1985-1989
  • 1955-1959
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  • 1
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    Home range and seasonal movements of Black Sea Bass (Centropristis striata) during their inshore residency at a reef in the mid-Atlantic Bight (2021)
    In:  mfabrizio@vims.edu | http://aquaticcommons.org/id/eprint/14540 | 403 | 2014-02-14 22:28:52 | 14540 | United States National Marine Fisheries Service
    Details
    Publication Date: 2021-06-27
    Description: Black Sea Bass (Centropristis striata) in the mid-Atlantic Bight undertake seasonal cross-shelf movements to occupy inshore rocky reefs and hardbottom habitats between spring and fall. Shelf-wide migrations of this stock are well documented, but movements and home ranges of fish during their inshore residency period have not been described. We tagged 122 Black Sea Bass with acoustic transmitters at a mid-Atlantic reef to estimate home-range size and factors that influence movements (〉400 m) at a 46.1-km2 study site between May and November 2003. Activity of Black Sea Bass was greatest and most consistent during summer but declined rapidly in September as water temperatures at the bottom of the seafloor increased on the inner shelf. Black Sea Bass maintained relatively large home ranges that were fish-size invariant but highly variable (13.7–736.4 ha), underscoring the importance of large sample sizes in examination of population-level characteristics of mobile species withcomplex social interactions. On the basis of observed variations in movement patterns and the size of home ranges, we postulate the existence of groups of conspecifics that exhibit similar space-use behaviors. The group of males released earlier in the tagging period used larger home ranges than the group of males released later in our study. In addition, mean activity levels and the probability of movement among acoustic stations varied among groups of fish in a complex manner that depended on sex. These differences in movement behaviors may increase the vulnerability of male fish to passive fishing gears, further exacerbating variation in exploitation rates for this species among reefs.
    Keywords: Biology ; Ecology ; Fisheries
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 82-97
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  • 2
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    Review of work programmes carried out in India on the biology of the milkfish Chanos chanos (2021)
    Aquaculture Department, Southeast Asian Fisheries Development Center | Tigbauan, Iloilo, Philippines
    In:  http://aquaticcommons.org/id/eprint/26152 | 17342 | 2019-01-22 03:10:47 | 26152 | Southeast Asian Fisheries Development Center, Aquaculture Department
    Details
    Publication Date: 2021-07-24
    Description: This account is a brief review of the investigation carried out in India on the various aspects of the biology of the milkfish. It covers the records of observations on the distribution of Chanos fry in the coastal areas, food and feeding of the fish, its growth, maturity, fecundity and spawning, and also certain experimental results on the physiological adaptation of the fish together with the histological structures of its kidney, pituitary and thyroid. While emphasizing the paucity of data on the adult milkfish in the wild, the priority areas where information is lacking especially on the spawning ground, reliable identifying characters of the egg as well as on the possible existence of different racial stocks have been discussed.
    Keywords: Aquaculture ; Biology ; Marine fish ; Fishery institutions ; Geographical distribution ; Feeding behaviour ; Fish physiology ; Histology ; Reproduction ; Reproductive behaviour ; Spawning ; Spawning grounds ; Spawning seasons ; Fish eggs ; Racial studies ; Milkfish ; India ; Chanos chanos
    Repository Name: AquaDocs
    Type: book_section
    Format: application/pdf
    Format: application/pdf
    Format: 181-192
    Format: 12
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  • 3
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    Population genetic structure of the white sardine, Sardinella albella, in the Persian Gulf and Sea of Oman by analysis of mitochondrial control region (2021)
    In:  http://aquaticcommons.org/id/eprint/22928 | 18721 | 2018-06-06 14:19:39 | 22928 | Iranian Fisheries Science Research Institute
    Details
    Publication Date: 2021-07-11
    Description: Several studies on the white sardine: Sardinella albella, have focused on the identification of stock composition and behavior. In this study population genetic structure and historical demography of S. albella along the cost of the Persian Gulf and Sea of Oman were investigated with a 500-bp segment of mt-DNA control region. In total 40 samples were collected from 3 locations: Jask in Sea of Oman, Qeshm in Strait of Hormuz and Lengeh in the Persian Gulf during 2012-2013. 33 haplotype were obtained none of which were presented in all sampling sites. Analysis of molecular variance (AMOVA) indicated low genetic differentiation among regions (F_ST=0.024, p〈0.05). The average pair wise differences between regional population were small but significant (0.0158-0.165). Molecular variance explained by differences among three regions was significantly different from zero but the F_ST did not show clear phylogeographic isolation. This observation can support the conclusion that S. albella has a widespread dispersal potential.
    Keywords: Biology ; Fisheries ; Sardinella albella ; Clupeidae ; Sardine Fish ; Persian Gulf ; Oman Sea ; Iran
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 995-1008
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  • 4
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    The potential impact of Ocean Thermal Energy Conversion (OTEC) on fisheries (2021)
    NOAA/National Marine Fisheries Service
    In:  http://aquaticcommons.org/id/eprint/2782 | 403 | 2011-09-29 18:28:25 | 2782 | United States National Marine Fisheries Service
    Details
    Publication Date: 2021-06-28
    Description: The commercial development of ocean thermal energy conversion (OTEC) operations will involve some environmental perturbations for which there is noprecedent experience. The pumping of very large volumes of warm surface water and cold deep water and its subsequent discharge will result in the impingement, entrainment, and redistribution of biota. Additional stresses to biota will be caused by biocide usage and temperature depressions. However, the artificial upwelling of nutrients associated with the pumping of cold deep water, and the artificialreef created by an OTEC plant may have positive effects on the local environment.Although more detailed information is needed to assess the net effect of an OTEC operation on fisheries, certain assumptions and calculations are made supporting the conclusion that the potential risk to fisheries is not significant enough to deter the early development of IDEe. It will be necessary to monitor a commercial-scale plant in order to remove many of the remaining uncertainties. (PDF file contains 39 pages.)
    Keywords: Ecology ; Fisheries ; Biology
    Repository Name: AquaDocs
    Type: monograph
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  • 5
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    Natural Suppression of the Aquatic Weed Salvinia molesta D.S. Mitchell, by Two Previously Unreported Fungal Pathogens (2021)
    In:  http://aquaticcommons.org/id/eprint/1618 | 3 | 2011-09-29 20:17:22 | 1618 | Aquatic Plant Management Society, Inc.
    Details
    Publication Date: 2021-07-09
    Description: Salvinia molestaD. S. Mitchell (Salviniaceae), variouslycalled giant salvinia, water fern or African payal, is a vegetativelyreproducing, perennial, free-floating, aquatic weed,native to southeastern Brazil (Waterhouse and Norris 1987).It (hereafter called salvinia) is a very serious weed in mostregions outside its native range (Harley and Mitchell 1981)including India. The purpose of this paper is to reporton two fungal pathogens that were found to be the causeof a sudden decline in salvinia in Bangalore.(PDF has 4 pages.)
    Description: In the July NOTES section
    Keywords: Management ; Biology ; Limnology ; Salvinia molesta ; Giant salvinia ; water fern ; African payal ; biological control ; Bangalore ; India
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 105-107
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  • 6
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    Review of a Small-scale Pelagic Longline Fishery off Northeastern Brazil (2021)
    In:  http://aquaticcommons.org/id/eprint/9800 | 403 | 2012-08-14 20:07:58 | 9800 | United States National Marine Fisheries Service
    Details
    Publication Date: 2021-07-09
    Description: The annual catches of four small longliners operating off northeast Brazil from 1983 to 1997 were examined across different areas and locations. The total catch comprised tunas (30%), sharks (54%), billfishes (12%), and other fish species (4%). Fishing strategy and annual composition of catches showed large spatial and temporal variabilities with the dominant catches alternating among yellowfin tuna,Thunnus albacares; gray sharks, Carcharhinus spp.; and blue shark, Prionace glauca. Catches of blue and gray sharksshowed a significant interaction among seamounts, with gray sharks occurring in maximum abundance around those seamountsthat had relatively deep summits and low-sloping depth profiles. Results are discussed in terms of the various factors that may have influenced distribution of effort.
    Keywords: Biology ; Ecology ; Fisheries
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 1-8
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  • 7
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    Étude du crabe rouge profond Geryon quinquedens en Côte d'Ivoire. 2 - Éléments de biologie et d'écologie avec références aux résultats obtenus au Congo (2021)
    In:  http://aquaticcommons.org/id/eprint/7955 | 424 | 2012-03-07 15:24:39 | 7955 | Centre de Recherches Océanographiques, Côte d'Ivoire
    Details
    Publication Date: 2021-06-27
    Description: Geryon quinquedens is present along the West African continental slope at depths from 300 to 1000 m, on silt-clay sediments. Geryon is a cold and rather poorly oxygenated water loving species. It is easily caught by traps as it is a scavenger and predatory crustacea. In a given area its distribution does not appear to be homogeneous: for example, densities of red crabs are higher in the eastern and western region of Côte d'Ivoire than in the central zone. Similar observations can be made off Congo, Angola and United States. It can be assumed that there is a relation between the abundance of Geryon and the productivity level of the area. Geographical variations of sex ratio are suspected to be correlated with the density distribution. Males and females have not the same bathymetric distribution: females are only common in the shallower waters (300-500 m) whereas males are present in the whole biotope. Seasonal migrations occur down and up the slope in both the sexes and are certainly related to the reproductive biology. Knowledge of the reproductive biology is also necessary to understand fishing-trap catch rate: egg maturation extends over several months and ovigerous females are exceptionally caught by traps; males also are less available during the same period (March to August) when migrations are less important; in this period, mean size increases and probably this happens at the end of a moult. From September to February the catch-rates increase. Growth is slow compared with other littoral Guinean Crustacea (Peneides). Females become sexually mature at a size of 80 mm (carapace width): modification in the allometric relations of abdomen and carapace are then conspicuous.
    Keywords: Biology ; Oceanography ; Côte d'Ivoire ; West African continental shelf ; Geryon quinquedens ; deep-sea red crab
    Repository Name: AquaDocs
    Type: article
    Format: application/pdf
    Format: application/pdf
    Format: 17-65
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  • 8
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    Ictiólogos de la Argentina: Aurelio Juan Santiago Pozzi (2021)
    Facultad de Ciencias Naturales y Museo (FCNyM), Universidad Nacional de La Plata (UNLP) | La Plata, Argentina
    In:  hlopez@fcnym.unlp.edu.ar | http://aquaticcommons.org/id/eprint/11017 | 196 | 2013-03-18 20:08:30 | 11017 | Facultad de Ciencias Naturales y Museo, Universidad Nacional de La Plata
    Details
    Publication Date: 2021-06-26
    Description: This series will include all those people who, by means of their contributions, great and small, played a part in the consolidation of ichthyology in Argentina.The general plan of this work consists of individual factsheets containing a list of works by each author, along with reference bibliography and, whenever possible,personal pictures and additional material.The datasheets will be published primarily in chronological order, although this is subject to change by the availability of materials for successive editions.This work represents another approach for the recovery and revalorization of those who set the foundations of Argentine ichthyology while in diverse historical circumstances.I expect this to be the beginning of a major work that achieves the description of such a significant part of the history of natural sciences in Argentina.
    Description: Programa para el estudio y uso sustentable de la biota austral (ProBiota)
    Description: Debe citarse: LÓPEZ, H. L; HUGO CASTELLO & J. PONTE GÓMEZ. 2012. Ictiólogos de la Argentina: Aurelio Juan Santiago Pozzi. ProBiota, FCNyM, UNLP, La Plata, Argentina, Serie Técnica y Didáctica 14(38): 1-47. ISSN 1515-9329.
    Keywords: Biology ; Argentina ; Biography ; Biografía ; Ichthyologysts ; Ictiólogos ; Aurelio Juan Santiago Pozzi
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
    Format: 47
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  • 9
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    Shifts in the estuarine demersal fish community after a fishery closure in Puget Sound, Washington (2021)
    In:  essing@uw.edu | http://aquaticcommons.org/id/eprint/14504 | 403 | 2014-02-13 18:26:57 | 14504 | United States National Marine Fisheries Service
    Details
    Publication Date: 2021-06-26
    Description: Puget Sound is one of the largest and most ecologically significant estuaries in the United States, but the status and trends of many of its biological components are not well known. We analyzed a 21-year time series of data from standardized bottom trawl sampling at a single study area to provide the first assessment of population trends of Puget Sound groundfishes after the closure of bottom trawl fisheries. The expected increase in abundance was observed for only 3 of 14 species after this closure, and catch rates of most (10) of the abundant species declined through time. Many of these changes were stepwise (abrupt) rather than gradual, and many stocks exhibited changes in catch rate during the 3-year period from 1997 through 2000. Nodetectable change was recorded for either temperature or surface salinity over the entire sampling period. The abrupt density reductions that were observed likely do not reflect changes in demographic rates but may instead represent distributional shifts within Puget Sound.
    Keywords: Biology ; Ecology ; Fisheries
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 205-217
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  • 10
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    Multiscale analysis of factors that affect the distribution of sharks throughout the northern Gulf of Mexico (2021)
    In:  mdrymon@disl.org | http://aquaticcommons.org/id/eprint/14532 | 403 | 2014-02-14 20:00:41 | 14532 | United States National Marine Fisheries Service
    Details
    Publication Date: 2021-06-27
    Description: Identification of the spatial scale at which marine communities are organized is critical to proper management, yet this is particularly difficult to determine for highly migratory species like sharks. We used shark catch data collected during 2006–09 from fishery-independent bottom-longline surveys, as well as biotic and abiotic explanatory data to identify the factors that affect the distribution ofcoastal sharks at 2 spatial scales in the northern Gulf of Mexico. Centered principal component analyses (PCAs) were used to visualize the patterns that characterize shark distributions at small (Alabama and Mississippi coast) and large (northern Gulf of Mexico) spatial scales. Environmental data on temperature, salinity, dissolved oxygen (DO), depth, fish and crustacean biomass, and chlorophyll-a (chl-a) concentration were analyzed with normed PCAs at both spatial scales. The relationships between values of shark catch per unit of effort (CPUE) and environmental factors were then analyzed at each scale with co-inertia analysis (COIA). Results from COIA indicated that the degree of agreement between the structure of the environmental and shark data sets was relatively higher at the small spatial scale than at the large one. CPUE of Blacktip Shark (Carcharhinus limbatus) was related positively with crustacean biomass at both spatial scales. Similarly, CPUE of Atlantic Sharpnose Shark (Rhizoprionodonterraenovae) was related positively with chl-a concentrationand negatively with DO at both spatial scales. Conversely, distribution of Blacknose Shark (C. acronotus) displayed a contrasting relationship with depth at the 2 scales considered. Our results indicate that the factors influencing the distribution of sharks in the northern Gulf of Mexico are species specific but generally transcend the spatial boundaries used in our analyses.
    Keywords: Biology ; Ecology ; Fisheries
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 370-380
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