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Report of the technical expert workshop : developing national criteria for assessing post-interaction mortality of sea turtles in trawl, net, and pot/trap fisheries : Shepherdstown, West Virginia, USA, 18-22 August 2015
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2016
[PDF-7.88 MB]
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Alternative Title:Developing national criteria for assessing post-interaction mortality of sea turtles in trawl, net, and pot/trap fisheries, Shepherdstown, West Virginia, USA, 18-22 August 2015
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Description:"Section 3(1)(A) of the Marine Mammal Protection Act (MMPA) (16 U.S.C. 1362(1)(A)) defines the term "depletion" or "depleted" to include any case in which "the Secretary, after consultation with the Marine Mammal Commission and the Committee of Scientific Advisors on Marine Mammals...determines that a species or a population stock is below its optimum sustainable population." Section 3(9) of the MMPA (16 U.S.C. 1362(9)) defines "optimum sustainable population [OSP]...with respect to any population stock, [as] the number of animals which will result in the maximum productivity of the population or the species, keeping in mind the carrying capacity [(K)] of the habitat and the health of the ecosystem of which they form a constituent element." The National Oceanic and Atmospheric Administration's (NOAA) National Marine Fisheries Service's (NMFS) regulations at 50 CFR 216.3 clarify the definition of OSP as a population size that falls within a range from the population level of a given species or stock that is the largest supportable within the ecosystem (i.e., carrying capacity, or K) to its maximum net productivity level (MNPL). MNPL is the population abundance that results in the greatest net annual increment in population numbers resulting from additions to the population from reproduction, less losses due to natural mortality. Historically, MNPL has been expressed as a range of values (between 50 and 70 percent of K) determined on a theoretical basis by estimating what stock size, in relation to the historical stock size, will produce the maximum net increase in population (42 FR 12010, March 1, 1977). In practice, NMFS has determined that stocks with populations under the mid-point of this range (i.e., 60 percent of K) are depleted (42 FR 64548, December 27, 1977; 45 FR 72178, October 31, 1980)"--Introduction. [doi:10.7289/V5/TM-NMFS-OPR-53 (https://doi.org/10.7289/V5/TM-NMFS-OPR-53)]
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Content Notes:Brian A. Stacy, Jennifer L. Keene, Barbara A. Schroeder.
"March 2016."
Includes bibliographical references (pages 106-110).
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Rights Information:Public Domain
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