Repositorio Institucional de la Universidad de Oviedo

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We are indebted to Peter Hutchinson (NASCO), who kindly revised and improved this work. We are grateful to Iván G. Pola for help with laboratory tasks. Thanks also to Paul Gastón (Green Lake National Fish Hatchery, US Fish and Wildlife Service), the US Forest Service, the University of Massachusetts, the US Fish and Wildlife Service, the Connecticut Department of Environmental Protection, and the Kensington State Salmon Hatchery for collaboration in sampling and providing information.