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(BREVOORTIA TYRRANUS) IN CHESAPEAKE BAY AND IMPLICATIONS FOR MANAGEMENT OF THE FISHERY

By Degree Candidate and Sara Jean Gottlieb and Sara Jean Gottlieb

Abstract

A simulation model was developed to characterize a range of solutions to the hypothesis that Atlantic menhaden are a significant consumer of primary productivity in Chesapeake Bay and that ecologically integrated management of the fishery could reduce eutrophication in the estuary. The model consisted of two components, one for pre-juvenile menhaden (age-0) and another for juvenile and adult menhaden (age 1-3). The parameters used in the models were drawn from the literature and through parameter estimation based on growth data provided by the National Marine Fisheries Service. The simulation of age-0 menhaden indicated they could remove 1.5- 39.1 % of primary productivity. The value of the consumption of nitrogen in phytoplankton by age-0 menhaden ranged from $1.17 to 15.0 million, while the commercial value of thefishery ranged from $0.41 to 5.03 million. Management adjustments in the simulation indicated that an unfished population could remove 3-4 % more phytoplankton than a fished one in any given year. The age 1-3 simulated population could consume 13.3- 193 % of primary productivity. The value of the consumption of nitrogen by this population ranged fro

Year: 2011
OAI identifier: oai:CiteSeerX.psu:10.1.1.194.9017
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