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Geographic variation in age, growth and size structure of Percilia irwini from south-central Chile

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Percilia irwini from the Andalién and Biobío River basins of south-central Chile exhibited a mean age of 1·4 years with a maximum age of 4 years. Size at age differed among river zones and males were 10% larger than females at all ages. Compared to other locations, populations of P. irwini inhabiting areas subject to industrial and domestic effluents exhibited smaller size structure.

Keywords: Andalién River; Biobío River; Chile; Percilia irwini; endangered species; sexual size dimorphism

Document Type: Research Article


Affiliations: 1: Department of Biology, Brigham Young University, 401 WIDB, Provo, UT 84602, U.S.A. 2: Aquatic Unit System, Environmental Science Centre Eula-Chile, University of Concepción, Concepción, Chile

Publication date: 2009-01-01

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