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Male-male relationships in orangutans


Utami Atmoko, S S; Singleton, I; van Noordwijk, M A; van Schaik, C P; Mitra Setia, T (2009). Male-male relationships in orangutans. In: Wich, S A; Utami Atmoko, S S; Mitra Setia, T; van Schaik, C P. Orangutans: geographic variation in behavioral ecology and conservation. New York, US: Oxford University Press, 225-233.

Abstract

Sexually mature male orangutans live in home ranges that are 3–5 times that of adult females and show very high overlap. Encounters among flanged males, while rare, are invariably antagonistic and may lead to injury or death. Their dominance relations are not always transitive, however, producing non-linear hierarchies, probably because they usually meet one on one. Flanged males in consortship with a receptive female frequently chase unflanged males trailing them, but never catch them, so that unflanged males often remain associated with the consort pair. Unflanged males are more tolerant among each other, although attacks also occur. The response of flanged males to long calls they hear depends on their dominance position: the dominant male approaches them, whereas the other males tend to avoid them. There is no conclusive information on the reaction of unflanged males. Data from Sumatra suggest that dominant flanged males and the males challenging them for local dominance were most commonly present in a given study area, suggesting that non-dominant males roamed more widely in search of uncontested access to females.

Sexually mature male orangutans live in home ranges that are 3–5 times that of adult females and show very high overlap. Encounters among flanged males, while rare, are invariably antagonistic and may lead to injury or death. Their dominance relations are not always transitive, however, producing non-linear hierarchies, probably because they usually meet one on one. Flanged males in consortship with a receptive female frequently chase unflanged males trailing them, but never catch them, so that unflanged males often remain associated with the consort pair. Unflanged males are more tolerant among each other, although attacks also occur. The response of flanged males to long calls they hear depends on their dominance position: the dominant male approaches them, whereas the other males tend to avoid them. There is no conclusive information on the reaction of unflanged males. Data from Sumatra suggest that dominant flanged males and the males challenging them for local dominance were most commonly present in a given study area, suggesting that non-dominant males roamed more widely in search of uncontested access to females.

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Additional indexing

Item Type:Book Section, refereed, original work
Communities & Collections:07 Faculty of Science > Department of Anthropology
Dewey Decimal Classification:300 Social sciences, sociology & anthropology
Language:English
Date:2009
Deposited On:06 Feb 2010 17:42
Last Modified:05 Apr 2016 13:52
Publisher:Oxford University Press
ISBN:978-0-19-921327-6
Publisher DOI:10.1093/acprof:oso/9780199213276.003.0015
Related URLs:http://opac.nebis.ch/F/?local_base=NEBIS&con_lng=GER&func=find-b&find_code=SYS&request=005683706
http://biblio.unizh.ch/F/?local_base=UZH01&con_lng=GER&func=find-b&find_code=SYS&request=001782937
Permanent URL: http://doi.org/10.5167/uzh-29526

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