Diel variation in fish assemblages in tidal creeks in southern Brazil

Brazilian Journal of Biology

Jf. Oliveira-neto¹  Hl. Spach¹  R. Schwarz-junior¹  Ha. Pichler¹ 

[1] ,Universidade Federal do Paraná Departamento de Zoologia Setor de Ciências BiológicasCuritiba PR ,Brazil

关键词: tidal creeks;    fish;    diel variation;    gamboas;    peixes;    variação diuturna;   

DOI  :  10.1590/S1519-69842008000100006

来源: SciELO

【 摘 要 】

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.

【 授权许可】

CC BY   
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