Details:

Personal Author:
Yeung, Cynthia
Corporate Authors:
Southeast Fisheries Science Center (U.S.)
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:
"This report presents the 1998 estimates of the bycatch of marine mammal and sea turtle taken by the part of the U.S. Atlantic pelagic longline fleet that lands tuna and Atlantic swordfish. The information is required by NOAA Fisheries to meet its responsibility for management of interactions between protected species and commercial fisheries based on the level of incidental serious injury and mortality. Serious injury is defined under proposed guidelines drafted by the NOAA Office of Protected Resources, and is equated to mortality for the purpose of bycatch estimation. Estimates were based on bycatch rates from a representative sample of the fleet recorded by scientific observers, and fishing effort reported by the fleet. Bycatch rates reported by the fleet were omitted. Estimates were constructed using the Delta-lognormal method. Robustness of the estimates to geographical and temporal effects was examined by pooling across strata (calendar quarters, fishing areas, and groups of species). Point estimates of bycatch were relatively insensitive to pooling treatments, but gains in precision of estimates (coefficient of variation) were attained in cases where bycatch numbers were relatively high. The total observed bycatch in 1998 amounted to six for marine mammals and 20 for marine turtles. Extrapolated to total fleet effort, the most precise estimate (pooling within years, within the three major fishing areas, and grouping of species) indicates that the US pelagic longline fleet operating in the Atlantic caught a total of 205 (57-828, 95%CI) marine mammals in 1998. Of these, the estimated number of marine mammals that were dead or seriously injured and thus presumed dead is 54 (10-277, 95% CI). For marine turtles, an estimated total of 728 (337-1824, 95%CI) were caught by the fleet in 1998. Of these, the estimated number that were dead or seriously injured and presumed dead is 708 (324-1788, 95% CI). Both marine mammals and turtles were mostly caught from the Grand Banks (Northeast Coastal region) fishing area of the US Atlantic EEZ"--Summary.
Content Notes:
by Cynthia Yeung.

"November 1999."

Also available online in PDF format.

Includes bibliographical references (leaf 8).


Keywords:
[+]
Bycatches (Fisheries) Longlining (Fisheries) Marine Mammals Measurement Mortality Sea Turtles
Series:
NOAA technical memorandum NMFS-SEFSC ; 430
Document Type:
Technical Memorandum
Place as Subject:
Atlantic Coast (U.S.) ; Gulf Coast (U.S.)
Atlantic Coast (U.S.) ; Gulf Coast (U.S.) Less -
Rights Information:
Public Domain
Compliance:
Library
Main Document Checksum:
[+]
urn:sha256:77fe74cac25016533cb3b82abe17883a84b0813d09771d3b898b7b4c5815c89b
Download URL:
https://repository.library.noaa.gov/view/noaa/10473/noaa_10473_DS1.pdf
File Type:

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