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Simulated response to harvesting strategies in an exploited ecosystem in the southwestern Gulf of Mexico Arreguín-Sánchez, F.; Zetina-Rejón, M.J.; Manickchand-Heileman, S.; Ramírez-Rodríguez, M.; Vidal, L. (2004). Simulated response to harvesting strategies in an exploited ecosystem in the southwestern Gulf of Mexico. Ecol. Model. 172(2-4): 421-432 In: Ecological Modelling. Elsevier: Amsterdam; Lausanne; New York; Oxford; Shannon; Tokyo. ISSN 0304-3800; e-ISSN 1872-7026, meer Ook verschenen in: Christensen, V.; Maclean, J.L. (Ed.) (2004). Placing fisheries in their ecosystem context. Ecological Modelling, 172(2-4). Elsevier: Amsterdam. 103-440 pp., meer

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Beschikbaar in	Auteurs
VLIZ: Open access 55276 [ download pdf ]

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Trefwoorden

Gulf of Mexico Hydrographic features > Gulfs > Western central atlantic > Gulf of mexico Marien/Kust

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Auteurs		Top
Arreguín-Sánchez, F. Zetina-Rejón, M.J. Manickchand-Heileman, S.	Ramírez-Rodríguez, M. Vidal, L.

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Abstract

The impact of some optimized harvesting strategies on ecosystem structure was investigated using a mass-balanced model ofthe ecosystem in the southwestern Gulf of Mexico, where there are four types of artisanal fisheries and a shrimp fishery that hascollapsed. The Ecopath with Ecosim software was used to simulate harvesting strategies aimed at optimizing economic (profit),social (jobs), ecological (conservation of ecosystem structure) and shrimp-recovery criteria. As expected, the ecosystem changesthat would ensue vary according to the combination of optimization goals. We found that for some scenarios, the extractionof biomass from a discrete trophic-level changes impacting ecosystem and catch structure. This was clearly observed throughthe tendency of the mean trophic level of the ecosystem and catch, as well as the fishing-in-balance index (FBI). A particulardiscussion was made about the collapsed shrimp fishery, where the impact of a specific shrimp-recovery strategy was evaluated.Collapse is strongly associated to physical variables and recovery based on trophic relationships is plausible but with a highecosystem structure cost.

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