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  • 1
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    Abundance and distribution of the eastern North Pacific Steller sea lion (Eumetopias jubatus) population (2021)
    In:  http://aquaticcommons.org/id/eprint/8935 | 403 | 2012-06-27 16:56:11 | 8935 | United States National Marine Fisheries Service
    Details
    Publication Date: 2021-06-29
    Description: The eastern Steller sea lion (Eumetopias jubatus) populationcomprises animals that breed along the west coast of North America between California and southeastern Alaska. There are currently 13 major rookeries (〉50 pups): five insoutheastern Alaska, three in British Columbia, two in Oregon, and three in California. Overall abundance hasincreased at an average annual rate of 3.1% since the 1970s. These increases can largely be attributed to population recovery from predator-control kills and commercial harvests, and abundance is now probably as high as it has been in the last century. The number of rookeries has remained fairly constant (n=11 to 13) over thepast 80 years, but there has been a northward shift in distribution of both rookeries and numbers of animals.Based on the number of pups counted in a population-wide survey in 2002, total pup production was estimated to be about 11,000 (82% in southeastern Alaska and British Columbia), representing a total population size as approximately 46,000−58,000 animal
    Keywords: Biology ; Ecology ; Fisheries
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 102-115
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  • 2
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    Claw extraction during molting of a stone crab, Menippe mercenaria (Decapoda, Brachyura, Xanthidae) (2021)
    Florida Department of Natural Resources, Marine Research Laboratory | St. Petersburg, FL
    In:  http://aquaticcommons.org/id/eprint/764 | 97 | 2020-08-24 03:28:23 | 764 | Florida Fish and Wildlife Conservation Commission
    Details
    Publication Date: 2021-07-02
    Description: (9pp.)
    Keywords: Aquaculture ; Biology ; Florida ; Stone crab ; molting ; Menippe mercenaria
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
    Format: application/pdf
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  • 3
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    An analysis of stone crab (Menippe mercenaria) landings on Florida's west coast with a brief synopsis of the fishery (2021)
    Florida Department of Natural Resources, Marine Research Laboratory | St. Petersburg, FL
    In:  http://aquaticcommons.org/id/eprint/778 | 97 | 2020-08-24 03:31:15 | 778 | Florida Fish and Wildlife Conservation Commission
    Details
    Publication Date: 2021-07-02
    Description: Document has 43 pages.
    Keywords: Oceanography ; Fisheries ; Biology ; Florida ; landings ; stone crab ; Menippe mercenaria
    Repository Name: AquaDocs
    Type: monograph
    Format: application/pdf
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  • 4
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    Evaluation of macrophyte control in 38 Florida lakes using triploid grass carp (2021)
    In:  http://aquaticcommons.org/id/eprint/1838 | 3 | 2011-09-29 20:00:28 | 1838 | Aquatic Plant Management Society, Inc.
    Details
    Publication Date: 2021-07-10
    Description: Florida’s large number of shallow lakes, warm climate andlong growing season have contributed to the development ofexcessive growths of aquatic macrophytes that have seriouslyinterfered with many water use activities. The introductionof exotic aquatic macrophyte species such as hydrilla (Hydrillaverticillata) have added significantly to aquatic plant problemsin Florida lakes. The use of grass carp (Ctenopharyngodonidella) can be an effective and economical control for aquaticvegetation such as hydrilla. Early stocking rates (24 to 74grass carp per hectare of lake area) resulted in grass carpconsumption rates that vastly exceeded the growth rates ofthe aquatic plants and often resulted in the total loss of allsubmersed vegetation. This study looked at 38 Florida lakesthat had been stocked with grass carp for 3 to 10 years withstocking rates ranging from 〈 1 to 59 grass carp per hectareof lake and 1 to 207 grass carp per hectare of vegetation todetermine the long term effects of grass carp on aquatic macrophytecommunities. The median PAC (percent area coverage)value of aquatic macrophytes for the study lakes afterthey were stocked with grass carp was 14% and the medianPVI (percent volume infested) value of aquatic macrophyteswas 2%. Only lakes stocked with less than 25 to 30 fish perhectare of vegetation tended to have higher than medianPAC and PVI values. When grass carp are stocked at levels of〉 25 to 30 fish per hectare of vegetation the complete controlof aquatic vegetation can be achieved, with the exception ofa few species of plants that grass carp have extreme difficultyconsuming. If the management goal for a lake is to controlsome of the problem aquatic plants while maintaining asmall population of predominately unpalatable aquaticplants, grass carp can be stocked at approximately 25 to 30fish per hectare of vegetation.
    Keywords: Management ; Biology ; Limnology ; Ctenopharyngodon idella ; biological control ; aquatic plant control ; lake management ; grass carp ; Florida
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 48-54
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  • 5
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    A Cooperative Management Solution to a Fishery Commons (2021)
    In:  http://aquaticcommons.org/id/eprint/9860 | 403 | 2012-08-16 20:42:40 | 9860 | United States National Marine Fisheries Service
    Details
    Publication Date: 2021-06-25
    Description: A common property resource with open access, such as a fishery, will be used to excess when faced with sufficient demand. This will lead to an excessive amount of effort on the part of the fishery, resulting in a depletion of the stock. This paper discusses the development of a property rights regime for the Atlantic calico scallop, Argopecten gibbus, fishery of Florida. The management solution of the Calico Scallop Conservation Association (CSCA) provides an example of the assignment of property rights to a common property resource without resorting to governmental intervention. In this particular fishery, self-regulation limited early harvesting which would be uneconomic; there may be other fisheries in which self-regulation could be economically efficient and biologically appropriate. While this solution may not be applicable to all common property resources, for those cases which may be similar; the example of the CSCA provides valuable information that may be helpful in establishing a more efficient use of the resource. Some types of government facilitation may also be useful.
    Keywords: Fisheries ; Management
    Repository Name: AquaDocs
    Type: article , TRUE
    Format: application/pdf
    Format: application/pdf
    Format: 14-18
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