Estimated Bycatch of Marine Mammals and Sea Turtles in the U.S. Atlantic Pelagic Longline Fleet During 2015

Garrison, Lance P.; Stokes, Lesley

doi:10.25923/kaf6-5c33

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Estimated Bycatch of Marine Mammals and Sea Turtles in the U.S. Atlantic Pelagic Longline Fleet During 2015

2017
By Garrison, Lance P. ; Stokes, Lesley
Series: NOAA technical memorandum NMFS SEFSC ; 709

[PDF-1.67 MB]

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Details:

Personal Author:

Garrison, Lance P. ; Stokes, Lesley

Garrison, Lance P. ; Stokes, Lesley Less -
Corporate Authors:

United States. National Marine Fisheries Service. ; Southeast Fisheries Science Center (U.S.)

United States. National Marine Fisheries Service. ; Southeast Fisheries Science Center (U.S.) Less -
NOAA Program & Office:

NMFS (National Marine Fisheries Service) ; SEFSC (Southeast Fisheries Science Center)

NMFS (National Marine Fisheries Service) ; SEFSC (Southeast Fisheries Science Center) Less -
Description:

The U.S. Atlantic Pelagic Longline fleet operates throughout the western North Atlantic Ocean, including along the U.S. coast from the Gulf of Mexico to New England, the waters of the Caribbean, and in international waters of the North Atlantic Ocean. The Atlantic longline fleet is defined as a Category I fishery under the Marine Mammal Protection Act, and it is also the subject of management under the Endangered Species Act due to interactions with leatherback (Dermochelys coriacea) and loggerhead (Caretta caretta) turtles. Total bycatch of marine mammals and turtles in the longline fishery was estimated for 2015 using data from the pelagic longline fishery observer program and a mandatory fishery logbook reporting program. We applied a delta-lognormal approach to estimate region specific and total annual interactions with protected species in the fishery. During 2015, there were an estimated 300.0 (199.7 – 450.4 [95% CI]) interactions with leatherback turtles and 242.6 (161.9 – 363.6 [95% CI]) interactions with loggerhead turtles. In addition, there were an estimated 11.4 (2.2 – 58.1 [95% CI]) interactions with green turtles and 3.2 (0.6 – 16.4 [95% CI]) interactions with unidentified hardshell turtles (based upon one observed interaction each). The primary marine mammals interacting with this fishery were pilot whales (Globicephala sp.) in western North Atlantic waters. Interactions were apportioned between short-finned and long-finned pilot whales based upon location and environmental parameters. The majority of interactions were with short-finned pilot whales with an estimated 200.6 (126.1 – 319.0 [95% CI]) interactions resulting in serious injury and an additional 30.0 (13.8 – 65.5 [95% CI]) interactions in which the animal was released alive. Potential sources of bias and uncertainty in these bycatch estimates are discussed.
Keywords:

[+]

Bycatches (Fisheries) Effect Of Fishing On Estimates Longlining (Fisheries) Marine Mammal Populations Sea Turtles
Series:

NOAA technical memorandum NMFS SEFSC ; 709
DOI:

https://doi.org/10.25923/kaf6-5c33
Document Type:

Technical Memorandum
Place as Subject:

Atlantic Ocean ; Caribbean Sea ; Mexico, Gulf of ; United States

Atlantic Ocean ; Caribbean Sea ; Mexico, Gulf of ; United States Less -
Rights Information:

Public Domain
Compliance:

Submitted
Main Document Checksum:

[+]

urn:sha256:184c8cb5085fe191b95e27af25825be07c7dd71cc8dd0eb4bb6240a517e11f8e
Download URL:

https://repository.library.noaa.gov/view/noaa/26508/noaa_26508_DS1.pdf
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Estimated Bycatch of Marine Mammals and Sea Turtles in the U.S. Atlantic Pelagic Longline Fleet During 2015

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