Affiliation: | Fundación Ecológica de Cuixmala, Apartado Postal 140, Melaque, Jalisco 48980, Mexico;Conservation Biology, Denver Zoological Foundation, 2300 Steele St., Denver, CO 80205, U.S.A.;USGS, Wyoming Cooperative Fish and Wildlife Research Unit, Box 3166 University Station, University of Wyoming, Laramie, WY 80272, U.S.A. |