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BIBTEX RIS

Diel variation in fish assemblages in tidal creeks in southern Brazil

2008; Instituto Internacional de Ecologia (Brazil); Volume: 68; Issue: 1 Linguagem: Inglês

10.1590/s1519-69842008000100006

ISSN

1678-4375

Autores

J. F. Oliveira‐Neto, Henry Louis Spach, Roberto Schwarz-Junior, Helen Audrey Pichler,

Tópico(s)

Fish Biology and Ecology Studies

Resumo

Tidal creeks are strongly influenced by tides and are therefore exposed to large differences in salinity and depth daily. Here we compare fish assemblages in tidal creeks between day and night in two tidal creeks in southern Brazil. Monthly day and night, simultaneous collections were carried out in both creeks using fyke nets. Clupeiformes tended to be caught more during the day. Cathorops spixii, Genidens genidens and Rypticus randalli tended to be caught at night. Sciaenidae also tended to be caught more during the night. In general, pelagic species were diurnal, while deep water species were nocturnal. These trends are probably due to a variety of causes, such as phylogeny, predation and net avoidance.

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