Seasonal variations in the diversity, abundance, and composition of species in an estuarine fish community in the Tropical Eastern Pacific, Mexico
Por:
Mendoza E., Castillo-Rivera M., Zárate-Hernández R., Ortiz-Burgos S.
Publicada:
1 nov 2009
Categoría:
Ecology, Evolution, Behavior and Systematics
Resumen:
The ichthyofauna of the Chacahua Lagoon in the western Oaxaca State of Mexico was sampled every 2 months, using a trawl net over seven sampling cycles. The estuary mouth closed in late January, generating hypersaline conditions in the system. A total of 33 species belonging to 20 families were recorded; most of them marine species, showing tropical and subtropical affinities. The most abundant species were Diapterus peruvianus, Centropomus robalito, Anchovia macrolepidota, Lile stolifera, and Lutjanus novemfasciatus. Total fish abundance and species richness were not significantly affected by the mouth closing, and this was related to the presence of a permanently open entrance channel with an adjacent lagoon, which allowed easy exchange of fish between these two systems. Canonical correspondence analysis (CCA) revealed that salinity and dissolved oxygen were the most important environmental variables in determining the observed variability in fish community composition. Two fish group
Filiaciones:
Mendoza E.:
Univ Nacl Autonoma Mexico, Fac Estudios Super Zaragoza, Mexico City 09230, DF, Mexico
Castillo-Rivera M.:
Univ Nacl Autonoma Mexico, Fac Estudios Super Zaragoza, Mexico City 09230, DF, Mexico
Zárate-Hernández R.:
Departamento de Biología, Universidad Autónoma Metropolitana, Unidad Iztapalapa, Avenida San Rafael Atlixco 186, Colonia Vicentina, CP 09340 México D.F, Mexico
Ortiz-Burgos S.:
Univ Nacl Autonoma Mexico, Fac Estudios Super Zaragoza, Mexico City 09230, DF, Mexico
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