Abstract
Fourteen female Japanese monkeys of the Arashiyama-B group ranging in age from 11 to 29 years were observed to elucidate the behavioral characteristics of aging monkeys. A positive significant correlation was found between the occurrences of rest and age, and a negative significant correlation between the occurrences of auto-grooming and age. Younger female monkeys tended to be in contact with or in proximity to group members, while older female monkeys tended to spend much more time alone. As for the grooming interactions, younger female monkeys more often groomed others than did older female monkeys. Also, the former engaged in grooming more frequently than in being groomed, while the latter spent more time in being groomed than in grooming. The old female monkeys showed no marked decline in rank, but some of them were surpassed by their adult daughters.
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Nakamichi, M. Behavioral characteristics of old female Japanese monkeys in a free-ranging group. Primates 25, 192–203 (1984). https://doi.org/10.1007/BF02382391
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DOI: https://doi.org/10.1007/BF02382391