108
R O G E R A . P O W E L L
Peterson, R. O. 1995. The wolves of Isle Royale: A broken balance. Minoqua, Wisc.: Willow
Creek Press.
Powell, R. A. 1979. Mustelid spacing patterns: Variations on a theme by Mustela. Zeitschrift
für Tierpsychologie 50: 153–165.
Powell, R. A. 1987. Black bear home range overlap in North Carolina and the concept of
home range applied to black bears. International Conference on Bear Research and Management 7: 235–242.
Powell, R. A. 1989. Effects of resource productivity, patchiness and predictability on mating and dispersal strategies. In V. Standen and R. A. Foley, eds., Comparative socioecology of mammals and humans, 101–123. Oxford, U.K.: Blackwell Scientific.
Powell, R. A. 1993a. Why do some forest carnivores exhibit intrasexual territoriality and
what are the consequences for management? Proceedings of the International Union of
Game Biologists 21: 268–273.
Powell, R. A. 1993b (2d ed). The fisher: Ecology, behavior and life history. Minneapolis: University of Minnesota Press.
Powell, R. A. 1994. Structure and spacing of Martes populations. In S. W. Buskirk et al.,
eds., Martens, sables and fishers: Biology and conservation, 101–121. Syracuse, N.Y.: Cornell University Press.
Powell, R. A. and J. J. Fried. 1992. Helping by juvenile pine voles (Microtus pinetorum),
growth and survival of younger siblings, and the evolution of pine vole sociality. Behavioral Ecology 4: 325–333.
Powell, R. A. and M. S. Mitchell. 1998. Topographical constraints on home range quality.
Ecography 21: 337–341.
Powell, R. A., J. W. Zimmerman, and D. E. Seaman. 1997. Ecology and behaviour of North
American black bears: Home ranges, habitat and social organization. London: Chapman
& Hall.
Powers, D. R. and T. McKee. 1994. The effect of food availability on time and energy
expenditure of territorial and non-territorial hummingbirds. Condor 96: 1064–1075.
Price, K., S. Boutin, and R. Ydenberg. 1990. Intensity of territorial defense in red squirrels:
An experimental test of the asymmetric war of attrition. Behavioral Ecology and Sociobiology 27: 217–222.
Pulliainen, E. 1984. Use of the home range by pine martens (Martes martes L.). Acta Zoologica Fennica 171: 271–274.
Pyke, G. H. 1984. Optimal foraging theory: A critical review. Annual Review of Ecology and
Systematics 15: 523–575.
Pyke, G. H., H. R. Pulliam, and E. L. Charnov. 1977. Optimal foraging: A selective review
of theory and tests. Quarterly Review of Biology 52: 137–154.
Reid, M. L. and P. J. Weatherhead. 1988. Topographic constraints on competition for territories. Oikos 51: 115–117 plus erratum Oikos 53: 143.
Reynolds, R. D. and J. W. Laundrè. 1990. Time intervals for estimating pronghorn and
coyote home ranges and daily movements. Journal of Wildlife Management 54: 316–
322.
R O G E R A . P O W E L L
Peterson, R. O. 1995. The wolves of Isle Royale: A broken balance. Minoqua, Wisc.: Willow
Creek Press.
Powell, R. A. 1979. Mustelid spacing patterns: Variations on a theme by Mustela. Zeitschrift
für Tierpsychologie 50: 153–165.
Powell, R. A. 1987. Black bear home range overlap in North Carolina and the concept of
home range applied to black bears. International Conference on Bear Research and Management 7: 235–242.
Powell, R. A. 1989. Effects of resource productivity, patchiness and predictability on mating and dispersal strategies. In V. Standen and R. A. Foley, eds., Comparative socioecology of mammals and humans, 101–123. Oxford, U.K.: Blackwell Scientific.
Powell, R. A. 1993a. Why do some forest carnivores exhibit intrasexual territoriality and
what are the consequences for management? Proceedings of the International Union of
Game Biologists 21: 268–273.
Powell, R. A. 1993b (2d ed). The fisher: Ecology, behavior and life history. Minneapolis: University of Minnesota Press.
Powell, R. A. 1994. Structure and spacing of Martes populations. In S. W. Buskirk et al.,
eds., Martens, sables and fishers: Biology and conservation, 101–121. Syracuse, N.Y.: Cornell University Press.
Powell, R. A. and J. J. Fried. 1992. Helping by juvenile pine voles (Microtus pinetorum),
growth and survival of younger siblings, and the evolution of pine vole sociality. Behavioral Ecology 4: 325–333.
Powell, R. A. and M. S. Mitchell. 1998. Topographical constraints on home range quality.
Ecography 21: 337–341.
Powell, R. A., J. W. Zimmerman, and D. E. Seaman. 1997. Ecology and behaviour of North
American black bears: Home ranges, habitat and social organization. London: Chapman
& Hall.
Powers, D. R. and T. McKee. 1994. The effect of food availability on time and energy
expenditure of territorial and non-territorial hummingbirds. Condor 96: 1064–1075.
Price, K., S. Boutin, and R. Ydenberg. 1990. Intensity of territorial defense in red squirrels:
An experimental test of the asymmetric war of attrition. Behavioral Ecology and Sociobiology 27: 217–222.
Pulliainen, E. 1984. Use of the home range by pine martens (Martes martes L.). Acta Zoologica Fennica 171: 271–274.
Pyke, G. H. 1984. Optimal foraging theory: A critical review. Annual Review of Ecology and
Systematics 15: 523–575.
Pyke, G. H., H. R. Pulliam, and E. L. Charnov. 1977. Optimal foraging: A selective review
of theory and tests. Quarterly Review of Biology 52: 137–154.
Reid, M. L. and P. J. Weatherhead. 1988. Topographic constraints on competition for territories. Oikos 51: 115–117 plus erratum Oikos 53: 143.
Reynolds, R. D. and J. W. Laundrè. 1990. Time intervals for estimating pronghorn and
coyote home ranges and daily movements. Journal of Wildlife Management 54: 316–
322.