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Estimates of cetacean and pinniped bycatch in the 2015 New England sink and mid-Atlantic gillnet fisheries

Author: Christopher Orphanides; Joshua M Hatch; Northeast Fisheries Science Center (U.S.),
Publisher: Woods Hole, Massachusetts : U.S. Department of Commerce, National Oceanic and Atmospheric Administration, National Marine Fisheries Service, Northeast Fisheries Science Center, December 2017.
Series: Northeast Fisheries Science Center reference document, 17-18.
Edition/Format:   eBook : Document : National government publication : English
Summary:
This report provides estimated bycatch of 5 species of small cetaceans and pinnipeds bycaught in the New England sink (NESG) and Mid-Atlantic (MAG) gillnet fisheries. The 2015 total serious injuries and mortalities in the NESG fishery were 177 (coefficient of variation [CV] =0.28) harbor porpoises (Phocoena phocoena phocoena), 55 (CV= 0.54) short-beaked common dolphins (Delphinusdelphis delphis), 1021 (CV = 0.25)  Read more...
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Details

Genre/Form: Online resources
Observations
Material Type: Document, Government publication, National government publication, Internet resource
Document Type: Internet Resource, Computer File
All Authors / Contributors: Christopher Orphanides; Joshua M Hatch; Northeast Fisheries Science Center (U.S.),
OCLC Number: 1021211454
Notes: "December 2017."
Description: 1 online resource (ii, 21 pages) : color maps.
Series Title: Northeast Fisheries Science Center reference document, 17-18.
Responsibility: by Christopher D. Orphanides and Joshua M. Hatch.

Abstract:

This report provides estimated bycatch of 5 species of small cetaceans and pinnipeds bycaught in the New England sink (NESG) and Mid-Atlantic (MAG) gillnet fisheries. The 2015 total serious injuries and mortalities in the NESG fishery were 177 (coefficient of variation [CV] =0.28) harbor porpoises (Phocoena phocoena phocoena), 55 (CV= 0.54) short-beaked common dolphins (Delphinusdelphis delphis), 1021 (CV = 0.25) gray seals (Halichoerus grypus grypus), 474 (CV = 0.17) harbor seals (Phocavitulina concolor), and 119 (CV = 0.34) harp seals (Pagophilus groenlandicus). The NESG estimates are based on observed bycatch consisting of 23 harbor porpoises, 3 short-beaked common dolphins, 131 gray seals, 87 harbor seals, and 12 harp seals. The 2015 total serious injuries and mortalities in the MAG fishery were 33 (CV = 1.16) harbor porpoises, 30 (CV= 0.55) short-beaked common dolphins, 15 (CV = 1.04) gray seals, and 48 (CV = 0.52) harbor seals. The MAG estimates are based on observed bycatch consisting of 2 harbor porpoises, 3 short-beaked common dolphins, 1 gray seal, and 5 harbor seals. Compliance with the 2010 Harbor Porpoise Take Reduction Plan pinger regulations was 86% in 2015, where compliance refers to the correct number of pingers used, not the pingers' functionalit y. Compliance rates in the 2015 MAG fishery were low for large mesh gillnets (55%) and relatively high for small mesh gillnets (87%).

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