Resumo

MENDOZA-CARRANZA, Manuel et al. The importance and diversity of fisheries resources at the Usumacinta River, Mexico. Rev. Mex. Biodiv. [online]. 2018, vol.89, suppl., pp.131-146. ISSN 2007-8706.  https://doi.org/10.22201/ib.20078706e.2018.4.2182.

The Usumacinta basin is one of the main hydrological systems in Mexico, it has a high diversity of flora and fauna, and it is the last free flowing river in the country, so that the generation of information that helps its sustainable use is urgent. The aim of this research is to analyze the species diversity associated with fishing in the basin of the Usumacinta, considering the importance of invasive species in relation to the diversity of exploited species. The basin was divided into 3 regions (forest, lagoons and coast). Throughout the basin, small-scale fisheries exploited 35 species (30 species of fish and 5 of crustaceans). The jaguar guapote (Parachromis managuensis), tilapia (Oreochromis niloticus), grass carp (Ctenopharyngodon idella), common carp (Cyprinus carpio), red carp (Carassius auratus) and the suckermouth armoured catfish (Pterygoplichthys spp.) are introduced species, representing 20.7% of the total. In the upper area, introduced species reached high catch rates, having the carps the highest capture rate. Although these species are a fundamental part of fisheries in the Usumacinta, its effects on the ecosystem should be analyzed, especially species with high abundances and no importance as the suckermouth armored catfish.

Palavras-chave : Fishery; Invasive species; Cyprinidae; Loricariidae; Connectivity.

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