<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="6.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Arreguin-Sanchez, Francisco</style></author><author><style face="normal" font="default" size="100%">Zetina-Rejon, Manuel</style></author><author><style face="normal" font="default" size="100%">Manickchand-Heileman, Sherry</style></author><author><style face="normal" font="default" size="100%">Ramirez-Rodriguez, Mauricio</style></author><author><style face="normal" font="default" size="100%">Vidal, Laura</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Simulated response to harvesting strategies in an exploited ecosystem in the southwestern Gulf of Mexico</style></title><secondary-title><style face="normal" font="default" size="100%">Ecological Modelling</style></secondary-title></titles><dates><year><style  face="normal" font="default" size="100%">2004</style></year><pub-dates><date><style  face="normal" font="default" size="100%">2004/3/1</style></date></pub-dates></dates><urls><web-urls><url><style face="normal" font="default" size="100%">http://www.sciencedirect.com/science/article/B6VBS-4BHJXWS-3/2/2708b97c9a0b23baa4c6ac4c18971d04</style></url></web-urls></urls><number><style face="normal" font="default" size="100%">2-4</style></number><volume><style face="normal" font="default" size="100%">172</style></volume><pages><style face="normal" font="default" size="100%">421-432</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">The impact of some optimized harvesting strategies on ecosystem structure was investigated using a mass-balanced model of the ecosystem in the southwestern Gulf of Mexico, where there are four types of artisanal fisheries and a shrimp fishery that has collapsed. 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 changes that would ensue vary according to the combination of optimization goals. We found that for some scenarios, the extraction of biomass from a discrete trophic-level changes impacting ecosystem and catch structure. This was clearly observed through the tendency of the mean trophic level of the ecosystem and catch, as well as the fishing-in-balance index (FBI). A particular discussion 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 high ecosystem structure cost.</style></abstract><notes><style face="normal" font="default" size="100%">TY  - JOUR</style></notes></record></records></xml>