Contrasting evolutionary responses in two co-distributed species of (Pisces, Galaxiidae) in a river from the glaciated range in Southern Chile.

Life-history traits are among the most important factors affecting population abundance and genetic diversity of species. Here, we analysed the genetic patterns of two species with different life-history traits to investigate how these biological differences impacted their evolution in the Valdivia River basin, Southern Chile. We analysed mitochondrial DNA (mtDNA) sequences from 225 individuals of and 136 of to compare patterns of genetic diversity, structure and demographic growth across the basin.