Spatial and temporal patterns and their influence on fish community at Itupararanga Reservoir, Brazil
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Data
2008-12-01
Autores
Smith, Welber Senteio
Petrere, Miguel [UNESP]
Título da Revista
ISSN da Revista
Título de Volume
Editor
Revista de Biologia Tropical
Resumo
The Itupararanga Reservoir is located at the Sorocaba River Basin, São Paulo State, Brazil. Five cities use the waters of this reservoir for human consumption. Despite this intensive use of the water resource, no study has been undertaken on the ichthyofauna of this reservoir. Collections were performed in nine sampling stations, where each three were located in the riverine, transitional and lacustrine zones. Fish specimens were collected using eight monofilament gillnets of 10 m length each, with varied mesh sizes, in the rainy and dry seasons, which corresponded to our spatial scale of analysis. Overall, 14 species of fish were identified, with the highest contribution from Characidae and Curimatidae. The most abundant species were: the "lambari", Astyanax fasciatus, the "saguiru", Cyphocharax modestus, the "lambari bocarra", Oligosarcus paranaensis, and the "mandi", Iheringichthys labrosus. Diversity tended to be higher during the dry season, although the difference was not statistically significant. Cluster analysis identified four season sampling groups differentiated by within-season distribution of species. Mantel's test showed that this distribution was little affected by environmental factors, suggesting that biotic factors were more important in determining the species distribution within the reservoir. Rev. Biol. Trop. 56 (4): 2005-2020. Epub 2008 December 12.
Descrição
Palavras-chave
Sorocaba river, Itupararanga Reservoir, structure community, species diversity, species richness, ichtyofauna
Como citar
Revista de Biologia Tropical. San Jose: Revista de Biologia Tropical, v. 56, n. 4, p. 2005-2020, 2008.