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Longitudinal changes and indicator species of the fish fauna in the subtropical Sinos River, Brazil

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This study investigated the fish fauna in the subtropical Sinos River, considering species addition and replacement and the occurrence of indicator species along a longitudinal gradient. Patterns in fish assemblage ordination evaluated by correspondence analysis reflected the headwater and lowland river reaches. Uppermost sampling stations were characterized by species with restricted occurrence and medium abundance, whereas in the lowland most species were captured only once during the surveyed period and in low abundance. Species addition prevailed between the headwater sampling stations and both addition and replacement occurred between the lowland sampling stations. Nine species were characteristic for the headwater reach and 14 species for the lowland reach.
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Keywords: Sinos River; fish longitudinal patterns; indicator species; neotropical fishes

Document Type: Regular Paper

Affiliations: Núcleo de Pesquisas Ecologícas e Sócio Ambientais de Macaé, Departamento de Ecologia, Universidade Federal do Rio de Janeiro (UFRI), Caixa Postal 119331, 27901–000 Macaé, RJ, Brazil

Publication date: 01 July 2006

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