2007 Fiscal Year Final Research Report Summary
A longitudinal study on or patterns and maternal styles in Japanese macaques
| Project/Area Number |
16330142
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Experimental psychology
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| Research Institution | Osaka University |
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Principal Investigator |
NAKAMICHI Masayuki Osaka University, Graduate School ofHuman Sciences, Professor (60183886)
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| Co-Investigator(Kenkyū-buntansha) |
YASUDA Jun Osaka University, Graduate School of Human Sciences, Assistant Professor (30324734)
SHIZAWA Yasuhiro Osaka University, Graduate School of Human Sciences, Assistant Professor (60372603)
TAKEDA Shohei Tokyo University ofAgriculture and Technology, Faculty ofAgiculture, Associate Professor (40222096)
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| Project Period (FY) |
2004 – 2007
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| Keywords | Japanese macaque / social behavior pattern / maternal styles / gorilla / longitudinal study / affiliative relationships |
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| Research Abstract |
The present study focused on relations between social behavior patterns and maternal styles of adult females in a free-ranging group of Japanese macaques, and on long-term social relationships of adult females with other group members and their maternal behaviors in a captive group of lowland gorillas. Based on social grooming performed by female Japanese monkeys, I found that they were very likely to concentrate their grooming interactions on closely related females and certain familiar unrelated females, while they also showed progressive trait for grooming since they formed grooming relationships with new partners. I also reported some maternal behaviors which might rarely occur in a wild situation: An adult female carried her newborn ventrally and her yearling dorsally at the same time. After two females lost their own newborn infants, they allowed their yearlings to suckle. These observations show a higher ability and flexibility of maternal behaviors in female Japanese monkeys.
Ba
… More
sed on long-term observations on a captive group of gorillas, I also reported some interesting cases which might not usually occur. After infant-swapping between a primiparous mother with a neonate and a multiparous mother with a 10-month-old infant, the mothers provided appropriate maternal care including nursing to their adopted infants, but the older infant still sought refuge with its biological mother more frequently than with its foster mother. Almost two years later, the younger infant who was weaned by its foster mother began nursing from its biological mother, who subsequently weaned her adopted infant. Then, the older infant who was weaned exhibited abnormal plucking hair behavior. These results indicate that it was difficult for the gorilla infant to quickly transfer its attachment figure from the mother to another adult female when the mother continued to remain in the group. I also reported repeated acts of baby-transfer between an experienced mother and her young adult females, indicating that the mother encouraged her inexperienced daughter by rectifying inappropriate maternal behavior toward the baby. Less
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Research Products
(76 results)
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[Journal Article] Minami Grooming relationships of adolescent orphans in a free-ranging group of Japanese macaques (Macaca fuscata) at Katsuyama : a comparison among orphans with sisters, orphans without sisters, and females with a surviving mother2005
Author(s)
Yamada, K., M., Nakamichi, Y., Shizawa, J., Yasuda, S., Imakawa, T., Hinobayashi, M
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Journal Title
Primates 46
Pages: 145-150
Description
「研究成果報告書概要(欧文)」より
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[Journal Article] Case reports on parturition and maternal behavior in a free-ranging group of Japanese monkeys at Katsuyama2004
Author(s)
Nakamichi, M., Yamada, K, Ohtsuka, N., Imakawa, S., Yasuda, J., Shizawa, Y
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Journal Title
Primate Research 20
Pages: 31-43
Description
「研究成果報告書概要(欧文)」より
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