Estimating consumption rates of juvenile sandbar sharks (Carcharhinus plumbeus) in Chesapeake Bay, Virginia, using a bioenergetics model*

Dowd, W. Wesley and Brill, Richard W. and Bushnell, Peter G. and Musick, John A. (2006) Estimating consumption rates of juvenile sandbar sharks (Carcharhinus plumbeus) in Chesapeake Bay, Virginia, using a bioenergetics model*. Fishery Bulletin, 104(3), pp. 332-342.

[img]
Preview
PDF (The document's language is English .) - Requires a PDF viewer such as GSview, Xpdf or Adobe Acrobat Reader
Download (353Kb) | Preview
Official URL: http://fishbull.noaa.gov/1043/dowd2.pdf

Abstract

Using a bioenergetics model, we estimated daily ration and seasonal prey consumption rates for six age classes of juvenile sandbar sharks (Carcharhinus plumbeus) in the lower Chesapeake Bay summer nursery area. The model, incorporating habitat and species-specific data on growth rates, metabolic rate, diet composition, water temperature (range 16.8−27.9°C), and population structure, predicted mean daily rations between 2.17 ±0.03 (age-0) and 1.30 ±0.02 (age-5) % body mass/day. These daily rations are higher than earlier predictions for sandbar sharks but are comparable to those for ecologically similar shark species. The total nursery population of sandbar sharks was predicted to consume ~124,000 kg of prey during their 4.5 month stay in the Chesapeake Bay nursery. The predicted consumption rates support the conclusion that juvenile sandbar sharks exert a lesser top-down effect on the Chesapeake Bay ecosystem than do teleost piscivores and hu

Item Type: Article
Title: Estimating consumption rates of juvenile sandbar sharks (Carcharhinus plumbeus) in Chesapeake Bay, Virginia, using a bioenergetics model*
Personal Creator/Author:
CreatorsEmail
Dowd, W. Wesley
Brill, Richard W.
Bushnell, Peter G.
Musick, John A.
Refereed: Yes
Journal or Publication Title: Fishery Bulletin
Volume: 104
Number: 3
Page Range: pp. 332-342
Date: 2006
ISSN: 0090-0656
Issuing Agency: United States National Marine Fisheries Service
Subjects: Biology
Ecology
Fisheries
Item ID: 8970
Depositing User: Patti M. Marraro
Date Deposited: 13 Aug 2012 15:33
Last Modified: 13 Aug 2012 15:33
URI: http://aquaticcommons.org/id/eprint/8970

Actions (login required)

View Item View Item

Document Downloads

More statistics for this item...