Affiliation: | (1) Department of Ecology, Evolution and Behavior, University of Minnesota, 1987 Upper Buford Circle, St. Paul, MN, 55108;(2) School of Statistics, University of Minnesota, U.S.A.;(3) Jane Goodall Institutes Center for Primate Studies, University of Minnesota, U.S.A.;(4) Jane Goodall Institute, Silver Spring, MD |