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

Autor: Ana Cristina Petry, U. H. Schulz
Rok vydání: 2006
Předmět:
Zdroj: Journal of Fish Biology. 69:272-290
ISSN: 1095-8649
0022-1112
DOI: 10.1111/j.1095-8649.2006.01110.x
Popis: 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. # 2006 The Fisheries Society of the British Isles
Databáze: OpenAIRE