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Volume 44 - Number 1 - 2009
Article

 

Fish communities in rivers mouths and streams of the Valparaiso Region, central Chile

Sergio Zunino1, Carolina Aliaga1 y Paola Da Venezia1

 

1Laboratorio Ecología y Biodiversidad, Departamento de Biología y Ciencias Ambientales, Facultad de Ciencias, Universidad de Valparaíso, Gran Bretaña 1111, Playa Ancha, Valparaíso, Chile

 

E-mail: sergio.zunino@uv.cl

 

The fish community in 11 rivers mouths and estuaries in the Region of Valparaiso, was studied between 1999 and 2006. The fish collection was carried out through electro fishing. The conservation status and origin of species was determined. The results showed the presence of 23 species representing 10 orders, 14 families and 18 genera. Fourteen species (68.8%) were found to be native and/or endemic, of which, 12 have conservation problems; Basilichthys microlepidotus is considered endangered, nine are vulnerable and two as inadequately known. In general, introduced species were the most abundant, including Cnesterodon decemmaculatus and Cheirodon interruptus which accounted for 62.7% of all fish collected, followed by the Chilean silverside with 15.6% while 20 other species had a low representation, as it happened with the endemic species Mordacia lapicida, Trichomycterus areolatus, Basilichthy australis and Percilia gillisi. This information will allow to recognize in a better way the effects of the activities to be developed in these ecosystems

 

Key words: Biocenosis, freshwater fish

 

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