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Simulating Ucides cordatus population recovery on fished grounds.

Piou, Cyril; Berger, Uta; Diele, Karen

Authors

Cyril Piou

Uta Berger



Abstract

The recovery of fishing grounds of Ucides cordatus populations in the Caeté Peninsula is a recurrent process due to individual movements. However, these movements could not be observed in the field. A pattern-oriented modeling approach was used to infer on U. cordatus individual behaviors from population-level observations. An individual-based model was specifically developed for this purpose. The model results informed that the reason of decision of movement of individual crabs was probably a local density-dependent process. Also, fitting the model to field spatial distribution patterns, this process could be seen as an intra-specific competition for nearby resources. It was hypothesized that the spatially structured organization of U. cordatus populations act as hierarchical buffer systems with nonfished high-density areas filling back the fishing grounds at different speeds. Density-induced movement may therefore be an important aspect for the sustainability of the U. cordatus fishery.

Publication Date 2010
Deposit Date Sep 24, 2013
Peer Reviewed Peer Reviewed
Volume 211
Pages 299-303
Book Title Mangrove Dynamics and Management in North Brazil
ISBN 978-3-642-13456-2
DOI https://doi.org/10.1007/978-3-642-13457-9_20
Keywords Ucides cordatus; Caeté Peninsula; resource competition; fishing grounds; population density;
Public URL http://researchrepository.napier.ac.uk/id/eprint/6357
Publisher URL http://dx.doi.org/10.1007/978-3-642-13457-9_20