| Affiliation: | Nicholas School of the Environment, Duke University, Box 90328, Durham, NC 27708 USA;;Max Planck Institute for Demographic Research, Konrad-Zuse-Strasse 1, 18057 Rostock, Germany;;Laboratorio de Ecología y Conservación de Vertebrados Terrestres, Instituto de Ecología, UNAM, Circuito exterior Ciudad Universitaria, 04510 México D.F., México;;Department of Biology, Duke University, Durham, NC 27708, USA;;Department of Statistical Science, Duke University, Durham, NC 27708, USA;;and Foundation for North American Wild Sheep, 720 Allen Avenue, Cody, WY 82414, USA |
