Male life history in natural populations of Japanese macaques: Migration, dominance rank, and troop participation of males in two habitats |
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Authors: | David S Sprague Shigeru Suzuki Hiroyuki Takahashi Shizue Sato |
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Institution: | (1) University of Tsukuba, Tsukuba, Japan;(2) Present address: Rural Ecosystem Dynamics Laboratory, National Institute of Agro-environmental Sciences, 305-0856 Tsukuba, Ibaraki, Japan;(3) Present address: Kyoto University, 606-8502 Kyoto, Japan;(4) Present address: Makki International Academy, Aoba, 980-0813 Sendai, Miyagi, Japan |
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Abstract: | This paper compares male life history parameters of two populations of Japanese macaques (Macaca fuscata
Blyth, 1875), studied without provisioning: Yakushima (M. f. yakui), a subtropical forest habitat in southwestern Japan, and Kinkazan (M. f. fuscata), a temperate, deciduous forest habitat in northeastern Japan. The males of the two sites experienced similar life histories
with respect to several traits. Age at natal dispersal was at about 5 years. Average troop residence was about three years.
Most males joined troops at the bottom of the rank order, although a few males joined troops at the top rank. Dominance ranks
of males tended to rise with the death or departure of higher ranking males. Visiting males accounted for about 41% of observed
mating at both sites. However, the two sites differed in the sex ratio of troops, partly because a larger proportion of males
apparently lived outside of troops in the Kinkazan site compared to Yakushima. In particular, non-natal young males were absent
from the main study troop at Kinkazan. Large within-species variation may exist in the degree to which males associate with
troops. |
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Keywords: | Male life history Mating strategy Dominance rank Migration Macaca fuscata |
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