1. Instituto de Ciencias Marinas y Limnológicas, Laboratorio de Fisiología de Peces, Universidad Austral de Chile; Valdivia Chile
2. U.S. Geological Survey, Leetown Science Center, S.O. Conte Anadromous Fish Research Laboratory; Turners Falls Massachusetts
3. Centro Fondap-IDEAL, Universidad Austral de Chile; Valdivia Chile
4. Department of Biology; University of Massachusetts; Amherst Massachusetts