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Demography of liontailed macaque (Macaca silenus) in an undisturbed rainforest of Silent Valley National Park, Kerala, India



Demography of liontailed macaque (Macaca silenus) in an undisturbed rainforest of Silent Valley National Park, Kerala, India



Journal of the Bombay Natural History Society 100(1): 65-71



The demography of the liontailed macaque (Macaca silenus) was studied in the Silent Valley National Park and its adjacent areas from 1993 to 1996. Birth rate, survival rate and growth rate were estimated by methods described by earlier authors (Caughley 1977, NRC 1981). Fourteen troops with 275 individuals were observed. The adult male:female sex ratio was 1:5.6. A low birth rate (0.22/adult female/year) and a high survival rate (0.98/individual/year) were the noteworthy features of the population. Birth rate decreased as the troop size and number of adult females increased. A marginal increase in growth rate was observed. The study provides estimates of population parameters of the endangered liontailed macaque in an undisturbed and contiguous rainforest for the first time.

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Accession: 004096885

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