Ictiofauna de los humedales del río San Pedro, Balancán, Tabasco, México

Castillo Domínguez, Alfonso; Barba Macías, Everardo; Navarrete, Alberto de Jesús; Rodiles Hernández, Rocío; Jiménez Badillo, María de Lourdes

dc.creator	Castillo Domínguez, Alfonso
dc.creator	Barba Macías, Everardo
dc.creator	Navarrete, Alberto de Jesús
dc.creator	Rodiles Hernández, Rocío
dc.creator	Jiménez Badillo, María de Lourdes
dc.date	2010-06-29
dc.date.accessioned	2016-05-03T15:25:11Z
dc.date.available	2016-05-03T15:25:11Z
dc.identifier	http://revistas.ucr.ac.cr/index.php/rbt/article/view/3133
dc.identifier	10.15517/rbt.v0i0.3133
dc.identifier.uri	https://hdl.handle.net/10669/25552
dc.description	San Pedro River?s wetlands sustain trophic nets in the fluvial system, due to the high habitat availability, and space and temporal variations. In order to describe the relationship between environmental parameters and ichthyofauna, this study evaluated fish assemblages composition, distribution, abundance, density, biomass, richness species, diversity and equitability in the wetlands. Sampling considered three different sites and climatic seasons (dry, rainy and cold fronts). The physical and chemical parameters considered were dissolved oxygen, temperature, pH, water transparency and the depth. Fishes were caught with a shrimp net, after six minutes towings and were identified afterwards. A total of 1 049 organisms of 25 fish species were caught, two of which were exotic species: Oreochromis niloticus and Parachromis managuense. A total of 23 species were found at site I (with the highest density 0.23ind./m2), 17 at site II (0.23ind./m2) and 14 at site III (0.12ind./m2). The dry season had the highest species number with 21 species, followed by the rainy season with 17 species, and the cold season with five species. Similarly, the highest biomass (8.30g/m2) was found in dry season, followed by the rainy (2.16g/m2) and the cold seasons (0.03g/m2). Considering seasons, highest density was found during the dry (0.436ind./m2), followed by the rainy (0.213ind./m2) and the cold (0.023ind./m2) seasons. The dominant density species during the study period, according to the quadrants graphic of Olmstead-Tukey were: Petenia splendida, Vieja heterospila, Vieja synspila, Dorosoma petenense and Astyanax aeneus. There were significant differences in the species richness among sites. Temperature, depth and transparency showed differences among the seasons. The canonical correspondence analysis indicated that fish distribution was governed by environmental parameters during all seasons. In terms of fish abundance and composition, environmental parameters play an important role showing spatial and temporal differences in the ecosystem, this could be explained with the fact that most of young fishes have a movement behavior to the wetlands, searching refuge and feed during the dry season. Considering the diversity indexes variation, it may be concluded that San Pedro River?s wetlands correspond to a system where the ichthyofauna composition fluctuates spatial and seasonally.	es-ES
dc.format	application/pdf
dc.language	spa
dc.publisher	Universidad de Costa Rica	en
dc.rights	Copyright (c) 2014 International Journal of Tropical Biology and Conservation	en
dc.source	Revista de Biología Tropical/International Journal of Tropical Biology and Conservation; Vol. 59 (2) June 2011	en
dc.source	Revista de Biología Tropical/International Journal of Tropical Biology and Conservation; Vol. 59 (2) June 2011	es-ES
dc.source	2215-2075
dc.source	0034-7744
dc.source	10.15517/rbt.v0i0
dc.title	Ictiofauna de los humedales del río San Pedro, Balancán, Tabasco, México	es-ES
dc.type	artículo original

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