Sexual Dimorphism in the Greater One-Horned Rhinoceros (Rhinoceros unicornis)

摘要: To assess sexual dimorphism in the greater one-horned rhinoceros ( Rhinoceros unicornis ), morphometric data were collected from 50 free-ranging individuals Royal Chitwan National Park, Nepal. Twenty-two mensural and 16 nonmensural characters 43 anesthetized seven carcasses, representing 4% of entire wild population, provided basis for this analysis. Adult males females differed significantly only a few characters. developed longer mandibular incisors neck musculature than females. Long (rather horns), powerful shoulder musculature, extensive skin folds figured prominently fights displays between breeding-age males. Males born zoos often are >25-cm taller at considerably larger mass Reduced size animals, as observed study, may be explained by stress on poor nutrition during long nonbreeding interval when young adults harassed dominant excluded prime grazing areas.