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Estimates of cetacean and pinniped bycatch in the New England and Mid-Atlantic gillnet fisheries in 2020 and 2021
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2023
[PDF-10.11 MB]
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Description:This report provides estimated bycatch of 7 species of small cetaceans and pinnipeds bycaught in the New England gillnet (NEG) and Mid-Atlantic gillnet (MAG) fisheries. The bycatch estimation approach used for prior year estimates was modified because only limited and non-representative observer data was available in 2020 and 2021 due to the COVID-19 pandemic (Precoda and Lyssikatos 2023). Instead of our standard approach of using each year’s observer data to calculate bycatch rates for that year and extrapolating that to estimate total bycatch for the same year, we used observer data from 3 years prior to the pandemic (2017-2019) to estimate bycatch rates and applied those rates to the total fishing effort in 2020 and in 2021. This approach is described at more length in the Methods section. For additional details on the bycatch estimation methodology, please refer to Orphanides and Hatch (2017) and Precoda and Orphanides (2022).
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Rights Information:CC0 Public Domain
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