On the mating system of the cooperatively breeding saddle-backed tamarin (Saguinus fuscicollis)
This paper reports on 5 years of observatiors of individually marked saddle-backed tamarins (Saguinus fuscicollis, Callitrichidae). Although callitrichids have long been presumed to have a monogamous social system, this study shows that the breeding structure of saddle-back tamarin groups is highly variable. Groups most commonly include two or more adult males and a single reproductive female, but occasionally contain only a single pair of adults, or less often, two reproductively active females and one or more males. Data on group compositions, group formations, intergroup movements and copulations show that the social and mating systems of this species are more flexible than those of any other non-human primate yet studied. Infants (usually twins) were cared for by all group members. There were two classes of helpers: young, nonreproductive individuals who helped to care for full or half siblings, and cooperatively polyandrous males who cared for infants whom they may have fathered. The observations suggest that non-reproductive helpers may benefit from their helping behavior through a combination of inclusive fitness gains, reciprocal altruism, and the value of gaining experience at parental care. © 1985 Springer-Verlag.
Duke Scholars
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- Behavioral Science & Comparative Psychology
- 41 Environmental sciences
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- 30 Agricultural, veterinary and food sciences
- 07 Agricultural and Veterinary Sciences
- 06 Biological Sciences
- 05 Environmental Sciences
Citation
Published In
DOI
EISSN
ISSN
Publication Date
Volume
Issue
Start / End Page
Related Subject Headings
- Behavioral Science & Comparative Psychology
- 41 Environmental sciences
- 31 Biological sciences
- 30 Agricultural, veterinary and food sciences
- 07 Agricultural and Veterinary Sciences
- 06 Biological Sciences
- 05 Environmental Sciences