...Recent research on gorilla society has revealed that females born in one group move to another, but form new groups with solitary males. Therefore, this group is an exogamous unit, and although it can be considered that there is a mechanism for avoiding inbreeding, it has become clear that there is severe conflict between males, and it is necessary to keep in mind that gorilla communities are a collection of groups in such antagonistic relationships. Junichiro Itani argued that there is no equivalent to a family in the society of higher primates, and that families are derived as subunits from polygynous, polymale, patrilineal groups such as chimpanzees, and called such groups, which are assumed to be the basis for the development of families, prebands. He also considered that the strong social bonds between males seen in prebands are the basis for making the division of labor by sex possible. ... *Some of the terminology that mentions "preband" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…近年のゴリラの社会についての研究では,ある集団で生まれた雌は他集団に移籍するが,単独行動をする雄と新たな集団をつくることが明らかにされ,したがってこの集団は外婚の単位であり,近親婚回避の機構は備わっているとみなしうるが,雄間には互いに相いれない厳しい対立があることが明らかになり,ゴリラの地域社会とはこのような拮抗関係にある集団の集合であるということに留意しておく必要がある。伊谷純一郎は,高等霊長類の社会には家族と同等のものは認めえないとし,家族はチンパンジーのような多雌多雄で父系の集団からその下位単位として析出するものとして,家族発生の母体となると想定されるこのような集団をプレバンドprebandと呼んだ。そして,プレバンド内に見られる雄間の強い社会的結合は,性による分業を可能にする基盤であると考えた。… ※「preband」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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