著者
杉山 幸丸 三谷 雅純 丸橋 珠樹 五百部 裕 ハフマンマイケル A 小清水 弘一 大東 肇 山越 言 小川 秀司 揚妻 直樹 中川 尚史 岩本 俊孝 室山 泰之 大沢 秀行 田中 伊知郎 横田 直人 井上(村山) 美穂 松村 秀一 森 明雄 山極 寿一 岡本 暁子 佐倉 統
出版者
京都大学学術出版会
巻号頁・発行日
2000-09

食う-食われる,エネルギー収支,どうやって子孫を残すか……サルたちはさまざまな生物的・非生物的環境とどのように関わりながら暮らしているのだろうか.本書によって,霊長類社会の研究者はその社会の生物学的背景をより深く理解でき,他の生物の生態研究者は霊長類における生態学的研究の最前線に触れられる.
著者
小川 秀司
出版者
日本霊長類学会
雑誌
霊長類研究 (ISSN:09124047)
巻号頁・発行日
vol.26, no.2, pp.143-158, 2010-12-20 (Released:2011-02-01)
参考文献数
31

I studied huddling groups of Japanese macaques (Macaca fuscata) in the Arashiyama E troop at the “Arashiyama Monkey Park Iwatayama” in Kyoto, central Japan. Japanese macaques made physical contact with other individuals and formed huddling groups when air temperatures were low. The 99-101 adult females and 26-36 adult males in the study troop formed 345 huddling groups during 42 scan samplings in the winter of 2001, and 376 huddling groups during 52 scan samplings in the winter of 2002. The average size of huddling groups was 2.34 (range: 2-7) individuals in 2001, and 2.31 (range: 2-6) individuals in 2002. There was no huddling group of two males. Females more frequently huddled with females than with males. Two maternal kin related females huddled more frequently than unrelated females did. Mother-daughter pairs huddled most frequently. Two individuals usually huddled ventrally-ventrally, ventrally-laterally, and ventrally-dorsally. The distribution of huddling group sizes shows that the approaching individuals did not choose a particular size of huddling. However, the approaching individuals chose locations where they simultaneously contacted with two individuals 1.5 times more frequently than locations where they contacted with only one individual. This choice made the shape of huddling groups triangular and diamond-shaped more frequently than expected. By decision making of each individual, specific patterns emerged in the shape, composition, and position of each individual in huddling groups. As well as huddling behaviors, two and more primate individuals were involved in various social interactions. During the interactions, primates make their decision based on complex cognitive mechanisms and non-linear functions, compete and cooperate with the same opponents in their troop, and predict and manipulate the opponent’s behavior. These traits in social interactions among primates might make their society more complex and interesting.
著者
小川 秀司
出版者
中京大学
雑誌
基盤研究(C)
巻号頁・発行日
2013-04-01 (Released:2014-07-25)

ネパールの主にShivapuri Nagarjun国立公園でアッサムモンキー(Macaca assamensis)を観察した.同地域のアッサムモンキーは,他のマカカ属の種と同様に母系の複雄複雌群を形成し,オスはマウンティングや抱き合い行動を行って,その際相手のペニスを触る事があった.また,オスは群れのコドモを抱く事もあった.しかし,タイに生息するアッサムモンキーやアッサムモンキーと近縁なチベットモンキー(M. thibetana)とは異なり,相手のペニスを舐める行動やブリッジング行動(2頭のオトナが一緒にコドモを持ち上げる行動)は,ネパールのアッサムモンキーでは観察されなかった.
著者
小川 秀司
出版者
中京大学
雑誌
基盤研究(C)
巻号頁・発行日
2010 (Released:2010-08-23)

東アフリカのタンザニア西部のサバンナウッドランド地帯で霊長類の生息状況を調査した.サバンナウッドランド地帯には,落葉樹がまばらに生えるウッドランドが広がり,常緑林と草地が点在している.調査地にはサバンナ性と森林性の哺乳類が共に生息していた.アカコロブスやアカオザルやアオザルは常緑林で,サバンナモンキーやキイロヒヒはサバンナウッドランドで多く発見された.チンパンジーは両植生を利用していたが,GIS解析によると常緑林割合が高い斜面に多くベッドを作っていた.
著者
小川 秀司
出版者
Primate Society of Japan
雑誌
霊長類研究 = Primate research (ISSN:09124047)
巻号頁・発行日
vol.26, no.2, pp.143-158, 2010-12-20
被引用文献数
1

I studied huddling groups of Japanese macaques (<i>Macaca fuscata</i>) in the Arashiyama E troop at the "Arashiyama Monkey Park Iwatayama" in Kyoto, central Japan. Japanese macaques made physical contact with other individuals and formed huddling groups when air temperatures were low. The 99-101 adult females and 26-36 adult males in the study troop formed 345 huddling groups during 42 scan samplings in the winter of 2001, and 376 huddling groups during 52 scan samplings in the winter of 2002. The average size of huddling groups was 2.34 (range: 2-7) individuals in 2001, and 2.31 (range: 2-6) individuals in 2002. There was no huddling group of two males. Females more frequently huddled with females than with males. Two maternal kin related females huddled more frequently than unrelated females did. Mother-daughter pairs huddled most frequently. Two individuals usually huddled ventrally-ventrally, ventrally-laterally, and ventrally-dorsally. The distribution of huddling group sizes shows that the approaching individuals did not choose a particular size of huddling. However, the approaching individuals chose locations where they simultaneously contacted with two individuals 1.5 times more frequently than locations where they contacted with only one individual. This choice made the shape of huddling groups triangular and diamond-shaped more frequently than expected. By decision making of each individual, specific patterns emerged in the shape, composition, and position of each individual in huddling groups. As well as huddling behaviors, two and more primate individuals were involved in various social interactions. During the interactions, primates make their decision based on complex cognitive mechanisms and non-linear functions, compete and cooperate with the same opponents in their troop, and predict and manipulate the opponent's behavior. These traits in social interactions among primates might make their society more complex and interesting.