SciELO - Scientific Electronic Library Online

 
vol.76 suppl.1Dinámica espacio-temporal de 13 especies de peces nativos en un ecotono lacustre-fluvial de la Cuenca del Río Valdivia (Chile)Patrones idiosincráticos de diversidad genética de peces nativos del Río San Pedro (Cuenca del Río Valdivia), un sistema de la región glaciada del sur de Chile índice de autoresíndice de assuntospesquisa de artigos
Home Pagelista alfabética de periódicos  

Gayana (Concepción)

versão On-line ISSN 0717-6538

Resumo

PIEDRA, Priscila et al. Movement patterns of the native fish fauna of the San Pedro River (Valdivia River Basin, Chile). Gayana (Concepc.) [online]. 2012, vol.76, suppl.1, pp. 59-70. ISSN 0717-6538.  http://dx.doi.org/10.4067/S0717-65382012000100006.

The Chilean native fish are characterized for having small sizes (< 30 cm). Due to this, they are generally described with a low swimming capacity and movement; nevertheless, there is no empirical study to show it. In this study we describe the movement patterns of six native species in the San Pedro River (Aplochiton taeniatus, Galaxias maculatus, Galaxias platei, Diplomystes camposensis, Basilichthys australis y Percilia gillissi) by using marking-recapture techniques with elastomeric inks and Pit tags. Our results suggest that most of the species show passive movements, crossing distances up to about 40 km in the flow direction. Movements between river banks were also frequent, even in zones of high turbulence of the river. Active movements upstream were note clear, but the analysis of the results altogether with information of the genetic structure, abundances and distribution of the species in the watershed, allows us to conclude that the movement patterns of all species studied are relevant for the maintenance of their metapopulation dynamics.

Palavras-chave : native fish; movement; mark-recapture; Pit-tags; Chile.

        · resumo em Espanhol     · texto em Espanhol     · pdf em Espanhol