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The adaptive value of sociality in mammalian groups
- J. Silk
- Biology, PsychologyPhilosophical Transactions of the Royal Society B…
- 29 April 2007
What is known about the reproductive consequences of sociality for mammals is reviewed to reflect the difficulty of quantifying the cumulative effects of behavioural interactions on fitness and the lack of information about the nature of social relationships among individuals in most taxa.
Social Bonds of Female Baboons Enhance Infant Survival
16 years of behavioral data are presented, which demonstrate that sociality of adult females is positively associated with infant survival, an important component of variation in female lifetime fitness.
Strong and Consistent Social Bonds Enhance the Longevity of Female Baboons
Social relationships among adult female baboons (Papio cynocephalus) II. Variation in the quality and stability of social bonds
This work draws on data derived from a 16-year study of baboons living in seven different social groups in the Amboseli basin of Kenya to evaluate the quality and stability of social bonds among females, and demonstrates that the quality of social Bonds directly affects their stability.
Chimpanzees are indifferent to the welfare of unrelated group members
Experimental tests of the existence of other-regarding preferences in non-human primates are presented and it is shown that chimpanzees (Pan troglodytes) do not take advantage of opportunities to deliver benefits to familiar individuals at no material cost to themselves, suggesting that chimpanzee behaviour is not motivated by other- Regarding preferences.
USING THE ' F' -WORD IN PRIMATOLOGY
- J. Silk
Social relationships among adult female baboons (papio cynocephalus) I. Variation in the strength of social bonds
Testing a number of predictions derived from kin selection theory about the strength of social bonds among adult female baboons suggests that social bonds play a vital role in females’ lives, and the ability to establish and maintain strong social bonds may have important fitness consequences for females.
The benefits of social capital: close social bonds among female baboons enhance offspring survival
- J. Silk, J. Beehner, D. Cheney
- BiologyProceedings of the Royal Society B: Biological…
- 7 September 2009
In a group of free-ranging baboons, Papio cynocephalus ursinus, the offspring of females who formed strong social bonds with other females lived significantly longer than the offspring who formed weaker social bonds, providing the first direct evidence that social relationships among female baboons convey fitness benefits.
Kin Selection in Primate Groups
- J. Silk
- Biology, PsychologyInternational Journal of Primatology
- 30 July 2002
The two cases demonstrate that kin selection can be a powerful source of altruistic activity within primate groups and need more information about the effects of kinship on the patterning of behavior across the Primates and accurate information about paternal kin relationships.
Social Components of Fitness in Primate Groups
- J. Silk
- Psychology, BiologyScience
- 7 September 2007
Research in the field and laboratory shows that sophisticated social cognition underlies social behavior in primate groups and a growing body of evidence suggests that the quality of social relationships has measurable fitness consequences for individuals.