期刊
NEOTROPICAL ICHTHYOLOGY
卷 16, 期 1, 页码 -出版社
SOC BRASILEIRA ICTIOLOGIA
DOI: 10.1590/1982-0224-20170065
关键词
Coastal stream; Migration; Reproduction; Stream dwelling fish
类别
资金
- Comissao de Aperfeicoamento de Pessoal do Nivel Superior - CAPES
- Conselho Nacional de Desenvolvimento Cientifico e Tecnologico - CNPq [301621/2013-6]
- Fundacao Carlos Chagas Filho de Apoio a Pesquisa do Estado do Rio de Janeiro - FAPERJ [E-26/203.193/2015]
- Programa Prociencia/UERJ/Sr2
Given the importance of fish movement to the dynamics and maintenance of stream dwelling fish communities from the Atlantic Forest, we analysed patterns of fish movement in a coastal stream from Southeastern Brazil, using mark-recapture technique. Displacement distance of each species were presented and discussed considering seasonal (rainy and dry) and body size patterns. We marked 10 species along the stream and recaptured 440 (34.6%) of the 1,270 marked fishes. The species with significant number of upstream moving individuals were Astyanax janeiroensis, Characidium interruptum, Astyanax hastatus, Parotocinclus maculicauda and Awaous tajasica. Only Pimelodella lateristriga presented significant differences between resident and moving individuals. Characidium interruptum and A. tajasica demonstrated greater downstream and upstream movement, respectively, moving up to 2,100 m. Even after controlling for species identity we found no significant correlation between fish length and individual displacement distance. Fishes moved longer distances during the rainy season, in accordance to the breeding season. Patterns of fish movement were in agreement to life-history traits of many of the studied species and can be reflecting specific behaviour and morphologies.
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