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Estimates of Cetacean and Pinniped Bycatch in Northeast and Mid-Atlantic Bottom Trawl Fisheries, 2014-2018
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2021
[PDF-632.38 KB]
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Description:This report provides bycatch estimates, calculated by using mortality and serious injury counts combined, for 6 cetacean and 2 pinniped species incidentally captured by Northeast bottom trawl (NEBT) and Mid-Atlantic bottom trawl (MABT) fishing operations from 2014 to 2018 (Table 1). The data presented here are an update from Lyssikatos et al. (2019) and Chavez-Rosales et al. (2018) which covers the fishing operations from 2012 to 2017. The bycatch estimation methodology does not differ from earlier years dating back to 2008 (Lyssikatos 2015; Chavez-Rosales et al. 2017). Stratified bycatch estimates were produced by using a ratio estimator by region, year, trimester, and ecoregion (Table 2). For details on the bycatch estimation methodology, please refer to recent documentation in Chavez-Rosales et al. 2018. The marine mammal species included for the 2014-2018 time period are: Atlantic white-sided dolphin (Lagenorhynchus acutus), common dolphin (Delphinus delphis delphis), common bottlenose dolphin- offshore stock (Tursiops truncatus truncatus), Risso’s dolphin (Grampus griseus), long-finned pilot whale (Globicephala melas), harbor porpoise (Phocoena phocoena phocoena), harbor seal (Phoca vitulina vitulina), and gray seal (Halichoerus grypus atlantica). The aim of this report is to document bycatch estimates for the 5-year period 2014 through 2018 to support the US Atlantic and Gulf of Mexico 2020 marine mammal stock assessment reports.
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Rights Information:Public Domain
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