An Atlantic sturgeon population index for ESA management analysis

"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. 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). 2013 NMFS (National Marine Fisheries Service) NEFSC (Northeast Fisheries Science Center) Library Public Domain 1863

2012年，《濒危物种法案》（Endangered Species Act）将大西洋鲟（Atlantic sturgeon，学名*Acipenser oxyrinchus*）列入保护名录，确定其4个显著种群单元（Distinct Population Segments，DPSs）为濒危种群，1个为受威胁种群。本研究针对美国东北部海域的大西洋鲟构建了种群丰度指数，以辅助管理者评估该类种群面临的潜在威胁。该指数依托渔业兼捕量估算数据、美国鱼类和野生动物管理局（U.S. Fish and Wildlife Service, USFWS）大西洋海岸鲟鱼标记数据库的相关数据，以及已发表的大西洋鲟生活史参数值构建。大西洋鲟总兼捕量的估算值，源自东北渔业观察员计划（Northeast Fisheries Observer Program, NEFOP）监测的商业捕捞作业观测记录数据。本研究采用参数化自助法构建风险分析模型，对该指数的输入数据不确定性开展评估。基于该指数，2006-2011年美国东北部近岸外洋海域的大西洋鲟平均种群丰度为417934尾，95%置信区间为165381至744597尾。该估算值未纳入全年栖息于河流与河口的大西洋鲟个体。本研究的丰度估算结果，与2007-2012年东北区域监测与评估计划近岸海域大西洋鲟扫海面积年度丰度估算结果相一致。——摘要。作者为约翰·科西克（John Kocik）、克里斯汀·利普斯基（Christine Lipsky）、蒂姆·米勒（Tim Miller）、保罗·拉戈（Paul Rago）与加里·谢泼德（Gary Shepherd）。发布时间为2013年4月，网络版于2013年4月22日上线——文档主页：http://nefsc.noaa.gov/publications/crd/crd1306/。系统需求：Adobe Acrobat Reader。包含参考文献（第11页）。2013年，美国国家海洋渔业局（National Marine Fisheries Service, NMFS）、东北渔业科学中心（Northeast Fisheries Science Center, NEFSC）图书馆 公有领域 编号1863