Nancy Marusha Creel

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Scott Creel,*' Nancy Marusha Creel,«* Michael G. L. Mffls, and Steven L. Monfort •Field Research Center for Ecology and Ethology, Rockefeller University, Box 38B RR2, Millbrook, NY 12545, USA, Selous Wild Dog Project, Frankfurt Zoological Society, % SCP, Box 1519, Dar es Salaam, Tanzania, 'Private Bag X-402, Kruger National Park, Skukuza, 1350, South(More)
Because the sex of mammals is chromosomally determined, populations generally produce a similar proportion of males and females. However, it has been recognized for more than century that individuals might increase their fitness by over-producing offspring of one sex, under certain conditions. Small biases in the secondary sex ratio are seen in many(More)
As global temperatures increase, interactions between species are affected by changes in distribution, abundance and phenology, but also by changes in behavior. The heat dissipation limitation hypothesis suggests that the ability to dissipate heat commonly limits the activity of endotherms, a problem that should be particularly acute for cursorial predators(More)
Social subordinates are reproductively suppressed in some communally breeding species, but not in others. Hypotheses for the evolution of reproductive suppression have focussed on ecological and demographic constraints limiting the benefits of attempting to breed as a subordinate. Factors determining the costs of breeding have received little attention. We(More)
African wild dogs (Lycaon pictus) are endangered, with only 3,000-5,000 remaining in the wild. It is believed that wild dogs are unusually vulnerable to viral diseases, particularly rabies and canine distemper (CDV). However, canine distemper has been confirmed by laboratory diagnosis in only one free-living wild dog. The 43,000 km2 Selous Game Reserve(More)
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