La Tour du Valat

Institut de recherche pour la conservation des zones humides méditerranéennes

Titre :	Matrix-based modeling of blue crab population dynamics with applications to the Chesapeake Bay
Auteurs :	T. J. Miller, Auteur
Type de document :	Article
Dans :	Estuaries (24(4) AUG 2001)
Article en page(s) :	535-544
Résumé :	Blue crab (Callinectes sapidus) plays an important ecological and economic role in estuaries from South America to New England. It supports a large commercial fishery in the United States with approximately one third of the landings taken from Chesapeake Bay. I developed a stage-based matrix model of the blue crab population to address three key questions: What is the ability of blue crab populations to support sustainable exploitation? What stages of the life cycle are most important in regulating the dynamics of the population? And specific to the Chesapeake Bay, what is the importance of a winter dredge fishery in determining long-term sustainability of the crab population? The model indicated that with the current pattern of exploitation blue crab populations are able to sustain a total instantaneous mortality rate (Z) similar to 0.7. If the natural mortality rate is estimated for a maximum life expectancy of 8 yr, this translates to moderate levels of exploitation (F

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