Distribution pattern of two fish species in a coastal stream in Southeast Brazil
Braz. j. biol
;
62(1): 171-178, Feb. 2002. mapas, tab, graf
Artigo
em Inglês
| LILACS
| ID: lil-321298
ABSTRACT
Longitudinal distribution of Mimagoniates microlepis and Hoplias malabaricus was analyzed in a coastal stream system in Southeast Brazil. Six sites were sampled by electrofishing in seven months, from July 94 to July 95. Densities of M. microlepis, and H. malabaricus and its prey (Poecilia vivipara, Deuterodon sp. and Astyanax janeiroensis) were estimated by the Zippin method; environmental variables of (i) kind of substratum; (ii) percentage of pools, runs, riffles, instream vegetation, and canopy were registered for each site in each sampling month. The relative importance of each biotic and abiotic variable was tested through simple correlation analyses. We verified that M. microlepis occurrence correlates with canopy; H. malabaricus is correlated with instream vegetation, pools, clay substratum, and P. vivipara densities; and P. vivipara correlates with pools and clay substratum. Our results suggest that environmental variables, and food and shelter availability are the main factors in determining M. microlepis and H. malabaricus distribution
Texto completo:
DisponíveL
Índice:
LILACS (Américas)
Assunto principal:
Peixes
Limite:
Animais
País/Região como assunto:
América do Sul
/
Brasil
Idioma:
Inglês
Revista:
Braz. j. biol
Assunto da revista:
Biologia
Ano de publicação:
2002
Tipo de documento:
Artigo
/
Documento de projeto
País de afiliação:
Brasil
Instituição/País de afiliação:
Universidade do Estado do Rio de Janeiro/BR
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