This study has investigated the social grooming diversity in kinship among adult female Formosan macaques (Macaca cyclopis) that inhabit Mt. Longevity, Kaohsiung. The major study groups were C group which consisted of 14-15 adult females. Field observation of C group was recorded for 660.6 hours. The results showed the frequency of grooming among related females was significantly higher than among unrelated females (both p < 0.001). In addition, 65% of social grooming within adult females was among relatives. However, 40% of adult females groomed equally with related and unrelated females, while 20% disproportionately groomed more with unrelated females than with related females. The grooming was kin-biased for 40%. About 8.68% of social grooming among unrelated females was being reciprocated. Therefore, the results indicated that social grooming among adult females took place more often among kin-related females may reinforce relationships while reciprocal grooming of unrelated females may serve to form alliance or ranking promotion in the social group.
This study has investigated the social grooming diversity in kinship among adult female Formosan macaques (Macaca cyclopis) that inhabit Mt. Longevity, Kaohsiung. The major study groups were C group which consisted of 14-15 adult females. Field observation of C group was recorded for 660.6 hours. The results showed the frequency of grooming among related females was significantly higher than among unrelated females (both p < 0.001). In addition, 65% of social grooming within adult females was among relatives. However, 40% of adult females groomed equally with related and unrelated females, while 20% disproportionately groomed more with unrelated females than with related females. The grooming was kin-biased for 40%. About 8.68% of social grooming among unrelated females was being reciprocated. Therefore, the results indicated that social grooming among adult females took place more often among kin-related females may reinforce relationships while reciprocal grooming of unrelated females may serve to form alliance or ranking promotion in the social group.