Aggressive behavior in a confined troop of Japanese macaques: Effects of density, season, and gender

A troop of Japanese macaques (Macaca fuscata) confined in a 2‐acre outdoor corral increased from 107 to 192 individuals during the 5‐year tenure of a project that assessed the effects of density, season, and gender on the expression of adult aggressive behavior. Two statistical subgroups of 16 males...

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Bibliographic Details
Published in:Aggressive behavior 1981, Vol.7 (2), p.145-164
Main Authors: Eaton, G. Gray, Modahl, Kurt B., Johnson, Deanne F.
Format: Article
Language:English
Subjects:
aggression
density
gender
Macaca fuscata
macaques
season
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Summary:A troop of Japanese macaques (Macaca fuscata) confined in a 2‐acre outdoor corral increased from 107 to 192 individuals during the 5‐year tenure of a project that assessed the effects of density, season, and gender on the expression of adult aggressive behavior. Two statistical subgroups of 16 males and 28 females that were adults at the start of the project and that survived until its completion were studied intensively. There were significant season and sex differences in all groups: males were much more aggressive than females, and males were most aggressive during the fall and and winter mating season; females were most aggressive during the spring and summer birth season. Only the 16 adult males increased their frequency of aggressive behavior as the population density increased. This increase was due to the greater number of potential antagonists available each year.
ISSN:0096-140X
1098-2337
DOI:10.1002/1098-2337(1981)7:2<145::AID-AB2480070207>3.0.CO;2-M