Evaluating methods for estimating rare events with zero-heavy data: a simulation model estimating sea turtle bycatch in the pelagic longline fishery

Barlow, Paige F. and Berkson, Jim (2012) Evaluating methods for estimating rare events with zero-heavy data: a simulation model estimating sea turtle bycatch in the pelagic longline fishery. Fishery Bulletin, 110(3), pp. 344-360.

[img]
Preview
PDF (The document's language is English .) - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader
Download (946Kb) | Preview
Official URL: http://fishbull.noaa.gov/1103/barlow.pdf

Abstract

Estimating rare events from zero-heavy data (data with many zero values) is a common challenge in fisheries science and ecology. For example, loggerhead sea turtles (Caretta caretta) and leatherback sea turtles (Dermochelys coriacea) account for less than 1% of total catch in the U.S. Atlantic pelagic longline fishery. Nevertheless, the Southeast Fisheries Science Center (SEFSC) of the National Marine Fisheries Service (NMFS) is charged with assessing the effect of this fishery on these federally protected species. Annual estimates of loggerhead and leatherback bycatch in a fishery can affect fishery management and species conservation decisions. However, current estimates have wide confidence intervals, and their accuracy is unknown. We evaluate 3 estimation methods, each at 2 spatiotemporal scales, in simulations of 5 spatial scenarios representing incidental capture of sea turtles by the U.S. Atlantic pelagic longline fishery. The delta-log normal method of estimating bycatch for calendar quarter and fishing area strata was the least biased estimation method in the spatial scenarios believed to be most realistic. This result supports the current estimation procedure used by the SEFSC.

Item Type: Article
Title: Evaluating methods for estimating rare events with zero-heavy data: a simulation model estimating sea turtle bycatch in the pelagic longline fishery
Personal Creator/Author:
CreatorsEmail
Barlow, Paige F.
Berkson, Jim
Refereed: Yes
Journal or Publication Title: Fishery Bulletin
Volume: 110
Number: 3
Page Range: pp. 344-360
Date: 2012
ISSN: 0090-0656
Issuing Agency: United States National Marine Fisheries Service
Subjects: Biology
Ecology
Fisheries
Management
Item ID: 8967
Depositing User: Patti M. Marraro
Date Deposited: 03 Aug 2012 19:12
Last Modified: 03 Aug 2012 19:12
URI: http://aquaticcommons.org/id/eprint/8967

Actions (login required)

View Item View Item

Document Downloads

More statistics for this item...