MIGRATION ALLIANCES AND COALITIONS AMONG ADULT MALE SOUTH AMERICAN SQUIRREL MONKEYS (SAIMIRI SCIUREUS) by CAROL L. MITCHELL1) (Department of Ecology and Evolutionary Biology, Princeton University, Princeton, NJ 08544, USA) (With 3 Figures) (Acc. 20-VII-1994) Summary 1. Male South American squirrel monkeys form groups whose composition remains stable over migrations between troops. These groups are called 'migration alliances'. 2. Members of migration alliances support one another against other males through coalitions in genital display bouts both during immigration and throughout the year. Male alliances do not function to overcome female dominance. 3. Seasonal reproduction in squirrel monkeys may influence male alliances by a) inten- sification of within-group competition during the mating season, and b) production of temporally and spatially fluctuating mating opportunities between groups. Introduction Social bonds in adult male group-living mammals are of interest because their occurrence appears to contradict theoretical and empirical evidence linking male reproductive success to competition among individual males for access to females (TRIVERS, 1972; CLUTTON-BROCK 2L al., 1982; WAL- TERS & SEYFARTH, 1987). What kinds of ecological and social conditions may lead to the appearance of male bonding? Primary patterns of the distribution of males in a population determine the initial possibilities for
Behaviour – Brill
Published: Jan 1, 1994
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