Spatial and temporal distribution of ichthyoplankton in the upper Uruguay river, Brazil

Brazilian Archives of Biology and Technology

Samara Hermes-silva¹  David Reynalte-tataje²  Evoy Zaniboni-filho² 

[1] ,Universidade Federal de Santa Catarina Laboratório de Biologia e Cultivo de Peixes de Água Doce Florianópolis SC ,Brasil

关键词: Ichthyoplankton;    fish eggs and larvae;    Uruguay river;    48-h cycles;   

DOI  :  10.1590/S1516-89132009000400017

来源: SciELO

【 摘 要 】

The distribution and abundance of fish eggs and larvae was analyzed in three sections of the Upper Uruguay river, in a stretch of 290 km. Samples were collected monthly from October, 2001 to March, 2002 during 48-h cycles at 6-h intervals between each sampling. Surface and bottom samples were collected with a 0.5-mm mesh cylindroconical net. Fishes from the Upper Uruguay river were reproductively active mainly from October to January, and this activity was more intense at the Ligeiro and Chapecó tributaries and Chapecó main river. It was observed that the tributaries are important spawning grounds and larval nursery sites, indicating the importance of preserving such environments.

【 授权许可】

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