A production modeling approach to the assessment of the horseshoe crab (Limulus polyphemus) population in Delaware Bay

Davis, Michelle L. and Berkson, Jim and Kelly, Marcella (2006) A production modeling approach to the assessment of the horseshoe crab (Limulus polyphemus) population in Delaware Bay. Fishery Bulletin, 104(2), pp. 215-225.

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Abstract

Horseshoe crab (Limulus polyphemus) is harvested commercially, used by the biomedical industry, and provides food for migrating shorebirds, particularly in Delaware Bay. Recently, decreasing crab population trends in this region have raised concerns that the stock may be insufficient to fulfill the needs of these diverse user groups. To assess the Delaware Bay horseshoe crab population, we used surplus production models (programmed in ASPIC), which incorporated data from fishery-independent surveys, fishery-dependent catch-per-unit-of-effort data, and regional harvest. Results showed a depleted population (B2003/=0.03−0.71) BMSY and high relative fishing mortality /FMSY=0.9−9.5). Future harvest (F2002strategies for a 15-year period were evaluated by using population projections with ASPICP software. Under 2003 harvest levels (1356 t), population recovery to BMSY would take at least four years, and four of the seven models predicted that the population would not reach BMSY within the 15year period. Production models for horseshoe crab assessment provided management benchmarks for a species with limited data and no prior stock assessment

Item Type: Article
Title: A production modeling approach to the assessment of the horseshoe crab (Limulus polyphemus) population in Delaware Bay
Personal Creator/Author:
CreatorsEmail
Davis, Michelle L.
Berkson, Jim
Kelly, Marcella
Refereed: Yes
Journal or Publication Title: Fishery Bulletin
Volume: 104
Number: 2
Page Range: pp. 215-225
Date: 2006
ISSN: 0090-0656
Issuing Agency: United States National Marine Fisheries Service
Subjects: Biology
Ecology
Fisheries
Item ID: 8992
Depositing User: Patti M. Marraro
Date Deposited: 03 Aug 2012 18:32
Last Modified: 03 Aug 2012 18:32
URI: http://aquaticcommons.org/id/eprint/8992

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