Use este identificador para citar ou linkar para este item: http://repositorio.ufla.br/jspui/handle/1/39574
Título: Ecomorphology of Astyanax species in streams with different substrates
Palavras-chave: Convergence
Divergence
Ecomorphological attributes
Freshwater fish
Habitat diversity
Intraspecific differences
Data do documento: Fev-2014
Editor: Sociedade Brasileira de Zoologia (SBZ)
Citação: SOUZA, M. A. et al. Ecomorphology of Astyanax species in streams with different substrates. Zoologia, Curitiba, v. 31, n. 1, p. 42-50, Feb. 2014. DOI: 10.1590/S1984-46702014000100006.
Resumo: In the present study, we assessed the ecomorphology of two species of Astyanax in streams with different substrates found in the Rio São Francisco Basin. The dominant substrate of each stream was defined as either "fine" (0 to 2 mm), "gravel" (2 to 250 mm), "rock" (> 250 mm), or "leaf bank". We analyzed a total of 22 ecomorphological attributes of Astyanax intermedius Eigenmann, 1908 (127 individuals) and Astyanax rivularis (Lütken, 1875) (238 individuals) adults. We detected significant ecomorphological differences between the populations of A. rivularis and A. intermedius from habitats with different types of substrates. However, the two species did not show the same morphological differences depending on the type of substrate. These results confirmed the hypothesis that individuals from environments with different characteristics may have different ecomorphological patterns. Knowing that morphology is associated with habitat use and available resources, the loss of a resource or a modification in the environment may directly affect the permanence of a species, leading to a loss of morphologic diversity.
URI: http://repositorio.ufla.br/jspui/handle/1/39574
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