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An Atlantic sturgeon population index for ESA management analysis
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2013
[PDF-1.19 MB]
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Description:"The listing in 2012 of Atlantic sturgeon (Acipenser oxyrinchus) under the Endangered Species Act identified four Distinct Population Segments (DPSs) as endangered and one as threatened. We developed an index of population abundance for Atlantic sturgeon in the Northeast to aid managers to evaluate potential threats to these stocks. The index uses fishery bycatch estimates, data from the USFWS Atlantic Coast Sturgeon Tagging Database, and published values of Atlantic sturgeon life history parameters. Estimates of total Atlantic sturgeon bycatch were derived from data collected on observed commercial fishing trips monitored by the Northeast Fisheries Observer Program (NEFOP). We evaluated uncertainty in the index input data with a risk analysis model that used a parametric bootstrapping approach. Based on our index, the mean abundance of Atlantic sturgeon in oceanic waters off the Northeast coast of the US during 2006-2011 was 417,934 fish, with a 95% confidence interval of 165,381 to 744,597 fish. This estimate does not include Atlantic sturgeon that may reside year-round in rivers and estuaries. Our abundance estimates are consistent with annual swept area abundance estimates of Atlantic sturgeon in nearshore areas derived from Northeast Area Monitoring and Assessment Program surveys conducted during 2007-2012"--Abstract.
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Content Notes:by John Kocik, Christine Lipsky, Tim Miller, Paul Rago, and Gary Shepherd.
"April 2013."
"Web version posted April 22, 2013"--Document home page: http://nefsc.noaa.gov/publications/crd/crd1306/
System requirements: Adobe Acrobat Reader.
Includes bibliographical references (page 11).
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Rights Information:Public Domain
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Compliance:Library
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