Sex Ratio, Herd Size and Composition and Sexual Segregation in Banteng in the Baluran National Park, Indonesia
2006
Satyawan Pudyatmoko | Djuwantoko
This research provided for the first time details observation on sex ratio, herd size and composition as well as the degree of sexual segregation of free ranging banteng. A total of 736 herds were examined from 1996 to 2003 in their natural habitat in the Baluran National Park, Indonesia. Results showed that sex ratio changed from female bias to more equal ratio. It was probably the results of higher predation rate on female than on male by dholes. The herd size varied greatly, with the most herds (76%) consisted of one to ten animals. However, the median was the same for all seasons (5 animals). Mixed sex herds were more frequent than single sex herds. Consequently, differed from the prediction, the degree of sexual segregation was low throughout the year. The responsible factors might include limited food availability and clumped water resources as well as a small population size.
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