Affiliation: | Department of Zoology and North Carolina Fish and Wildlife Cooperative Research Unit, North Carolina State University, Raleigh, North Carolina 27695, U.S.A.;Ecology and Evolutionary Biology Dept., University of Colorado, Boulder, Colorado 80309-0334, U.S.A.;Interdisciplinary Arts and Sciences, University of Washington, Bothell, and Department of Biology, University of Washington, Seattle, Washington 98195, U.S.A. |