Competitive interaction between introduced rainbow trout and native silverside in a Chilean stream

Pardo R.; Vila, I.; Capella, JJ

Abstract

The field experiment presented here elucidates the competitive effect of exotic trout on Chilean silverside. This is the first local experimental work that demonstrates the negative effect of trout on native fish from Chile. Interspecific competition between the Chilean Silverside Basilichthys australis and the rainbow trout Oncorhynchus mykiss was evaluated by an experimental design that used enclosures in a stream of central Chile. Nine enclosures were equally assigned to three treatments, low density, with two silversides; interspecific treatment, with two silversides and four trout; and high density treatment, with six silversides. The results indicate that silversides were weaker competitors, negatively affected by the presence of trout; they showed significant weight loss and reduction in stomach content in the presence of trout. © Springer Science + Business Media B.V. 2009.

Más información

Título según WOS: Competitive interaction between introduced rainbow trout and native silverside in a Chilean stream
Título según SCOPUS: Competitive interaction between introduced rainbow trout and native silverside in a Chilean stream
Título de la Revista: ENVIRONMENTAL BIOLOGY OF FISHES
Volumen: 86
Número: 2
Editorial: Springer
Fecha de publicación: 2009
Página de inicio: 353
Página final: 359
Idioma: English
URL: http://link.springer.com/10.1007/s10641-009-9532-1
DOI:

10.1007/s10641-009-9532-1

Notas: ISI, SCOPUS