A spatial dynamic multistock production model

We developed a generalized spatial dynamic age-structured multistock production model by linking bioenergetic principles of physiology, population ecology, and community trophodynamics to a two-dimensional finite- element hydrodynamic circulation model. Animal movement is based on a search of an environmental-habitat feature vector that maximizes cohort production dynamics. We implemented a numerical version of the model and used scientific data visualization to display real-time results. As a proxy for larger regional-scale dynamics, we applied the model to study the space-time behavior of recruitment and predator-prey production dynamics for cohorts of spotted seatrout (Cynoscion nebulosus) and pink shrimp (Penaeus duorarum) in the tropical waters of Biscayne Bay, Florida. Resume : Nous avons elabore un modele de production spatial et dynamique generalise pour stock mixte, structure selon l'âge, en liant des principes bioenergetiques de physiologie, l'ecologie des populations et la trophodynamique des communautes a un modele de circulation hydrodynamique d'elements finis a deux dimensions. Les deplacements des animaux sont fondes sur la recherche d'un vecteur de caracteristiques lie a l'environnement et a l'habitat qui maximise la dynamique de production des cohortes. Nous avons applique une version numerique du modele et utilise la visualisation de donnees scientifiques pour afficher les resultats en temps reel. Comme approximation de la dynamique plus vaste a l'echelle regionale, nous avons applique le modele pour etudier le comportement spatio-temporel de la dynamique de production en rapport avec le recrutement et les relations predateurs-proies chez des cohortes d'acoupa pintade (Cynoscion nebulosus) et de crevette rose du Nord (Penaeus duorarum) dans les eaux tropicales de la baie Biscayne, en Floride.

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