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Classification and comparison of five estuaries in the southeast Gulf of California based on environmental variables and fish assemblages

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Estuarine systems in subtropical and tropical areas of the Mexican Pacific are characterized by specific hydrological, biological and anthropogenic conditions. Using multivariate analyses of geomorphic, biological and anthropogenic variables, five of the largest estuarine systems of the southeastern Gulf of California were classified into types of estuary using a similar classification method to that employed in New South Wales, Australia. Three types of estuary were identified: tide-dominated, wave-dominated and intermittently-closed. These characteristics were related to the fish assemblages from every system, using the CPUE to make results comparable among all estuaries. Our results demonstrated that intrinsic estuarine characteristics, such as geomorphologic, biological, physicochemical, anthropogenic and biogeographical, are likely to have a strong influence on the diversity and structure of fish assemblages, but more information is needed on the ecology and biology of the fish fauna to understand how these variables affect the different fish species.
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Affiliations: 1: Instituto de Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México. Joel Montes Camarena S/N, Mazatlán 82040, México 2: Centro Interdisciplinario de Ciencias Marinas del Instituto Politécnico Nacional. Av. IPN s/n, La Paz, BCS, 23096, México

Appeared or available online: 01 November 2018

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