Spatial synchrony of a highly endemic fish assemblage (Segredo reservoir, Iguacu river, Paraná state, Brazil)
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Data
2005-08
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Editor
Instituto Internacional de Ecologia
Resumo
In this study, patterns of spatial synchrony in population fluctuations (cross-correlation) of an endemic
fish assemblage of a Neotropical reservoir (Segredo Reservoir, Iguaçu River, Paraná State, Brazil)
were reported. First, the level of population synchrony for 20 species was estimated. Second, population
synchrony was correlated, using the Mantel test, with geographical distances among sites (n = 11)
and also environmental synchrony (temperature). Nine species presented significant correlations between
spatial synchrony and geographic distances (Astyanax sp. b, Astyanax sp. c, Pimelodus sp., Hoplias
malabaricus, Crenicichla iguassuensis, Hypostomus derbyi, Hypostomus myersi, Rhamdia branneri,
and R. voulezi). Considering the ecology of the species and the significant relationship between
population and environmental synchronies, it seems that environmental stochasticity is the most plausible hypothesis in explaining the observed synchrony patterns.
Descrição
Palavras-chave
Spatial synchrony, Sincronia espacial, Fish assemblage, Reservoirs, Assembléia de peixes, Reservatórios
Citação
DOMINGUES, W. R.; AGOSTINHO, A. A.; BINI, L. M. Spatial synchrony of a highly endemic fish assemblage (Segredo reservoir, Iguacu river, Paraná state, Brazil). Revista Brasileira de Biologia, São Carlos, v. 65, n. 3, p. 439-449, Aug. 2005.