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Invasive rainbow trout Oncorhynchus mykiss preying on the endangered naked characin Gymnocharacinus bergii at its thermal limits

2017; Wiley; Volume: 91; Issue: 6 Linguagem: Inglês

10.1111/jfb.13478

1095-8649

Sofía Quiroga, Federico Pablo Kacoliris, Ignacio García, Hernán Povedano, Melina Alicia Velasco, Sergio M. Zalba,

Fish Biology and Ecology Studies

The expansion of the invasive rainbow trout Oncorhynchus mykiss into the thermal headwaters of Valcheta Stream (Patagonia, Argentina) and new predation records on the endangered endemic naked characin Gymnocharacinus bergii are presented here. These findings are discussed in relation to the contemporary evolution and thermal refuges hypothesis. This study has immediate implications for the conservation of G. bergii .