Altruistic behavior in a sphecid wasp: support for kin-selection theory
Science (New York, N.Y.)
|March 24, 1972
Summary
Group living in Trigonopsis cameronii involves related females cooperating on nests. Altruistic behaviors, like not stealing prey, are explained by kin selection due to high relatedness among nestmates.
Area of Science:
- Behavioral Ecology
- Evolutionary Biology
- Entomology
Background:
- Trigonopsis cameronii exhibits group nesting behavior.
- Nestmates in this species are often highly related due to inbreeding and philopatry.
Purpose of the Study:
- To investigate the social behavior and relatedness of Trigonopsis cameronii females.
- To explain altruistic behaviors within cooperatively breeding groups using evolutionary theory.
Main Methods:
- Observational studies of female behavior within nests.
- Analysis of relatedness among nestmates (inferred from breeding patterns).
Main Results:
- Females form groups of up to four individuals on single nests.
- High relatedness among nestmates was observed.
- Cooperative behaviors, including prey sharing, were documented.
Conclusions:
- Altruistic behavior in Trigonopsis cameronii is likely driven by kin selection.
- The findings support the role of inclusive fitness in the evolution of sociality in this species.
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