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The social factors that influence cooperation have remained largely uninvestigated but have the potential to explain much of the variation in cooperative behavior observed in the natural world. We sho...
Prehensile tails, capable of suspending the entire body weight of an animal, have evolved in parallel in New World monkeys (Platyrrhini): once in the Atelinae (Alouatta, Ateles, Brachyteles, Lagothrix...
Tooth cusp radius of curvature (RoC) has been hypothesized to play an important role in food item breakdown, but has remained largely unstudied due to difficulties in measuring and modeling RoC in mul...
Parallels of Zipf's law of brevity, the tendency of more frequent words to be shorter, have been found in bottlenose dolphins and Formosan macaques. Although these findings suggest that behavioral rep...
Yersiniosis, which is caused by pathogenic Yersinia enterocolitica or Yersinia pseudotuberculosis, poses a serious problem for zoological gardens engaged in breeding nonhuman primates. In Japan, Y. ps...
Xenotransplantation is a hot topic currently, since the demand for diverse organs is increasing in patients. Among many species, pigs are suitable animals for xenotranplantation as they share many ana...
The Development and Maturation of the Supracrestal Fibers in Nonhuman Primates.
Treatment of men of reproductive age with radiation or alkylating agents often produces prolonged azoospermia. We previously demonstrated that suppression of testosterone (T) with gonadotropin-rel...

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