1. Center of Applied Ecology and Sustainability (CAPES); Pontificia Universidad Catolica de Chile; Avenida Libertador Bernardo O'Higgins 340 Santiago Chile
2. Centro de Investigaciones Biológicas del Noroeste (CIBNOR); CONACYT Research Fellow; Avenida IPN s/n La Paz B.C.S. 23096 Mexico
3. Department of Fisheries and Wildlife; Oregon State University; 104 Nash Hall Corvallis OR 97331 U.S.A
4. Inter American Tropical Tuna Commission; (IATTC) 8901 La Jolla Shores Drive La Jolla CA 92037-1508 U.S.A
5. Geomatic Research; Corvallis OR 97330 U.S.A