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Diet analysis of Atlantic croaker (Micropogonias undulatus), weakfish (Cynoscion regalis), blue catfish (Ictalurus furcatus), striped bass (Morone saxatilis), summer flounder (Paralichthys dentatus), and silver perch (Bairdiella chrysoura) in the James, York, and Rappahannock Rivers, VA, March 2004 to April 2005
Parthree, Debra
Parthree, Debra
Abstract
A principal requirement of multispecies fisheries assessment models is well-quantified estimates of predator-prey relationships (Latour et al. 2003). Trophic interactions among populations are typically elucidated through the analysis of stomach contents. It must be recognized, however, that such interactions vary according to temporal and spatial scales. Therefore, to adequately characterize these interactions within an ecosystem, an extensive database of fish diet composition information is needed. Further, given that increased survival in the early life history stages may ultimately improve the year-class strength of a fish population (Boynton et al., 1981 ), consideration of young-of-the year (YOY) and juvenile fish diets is particularly important. The purpose of this study is to diversify the existing CTILS fish diet database to be incorporated into the Chesapeake Bay Ecopath with Ecosim (EwE) model as well as several multispecies bioenergetics models (Latour et al. 2003) currently under development by our research group. From these models, sound management decisions can be made based upon a more complete understanding of the population dynamics and interactions of commercially and recreationally exploited fish stocks.
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2005-11-11
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Fisheries Science Reports, Estuarine fishes -- Food -- Virginia
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Virginia Institute of Marine Science
DOI
https://doi.org/10.25773/ntvs-j674