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Published on: August 18, 2023
Evolutionary causes and consequences of consistent individual variation in cooperative behaviour
Ralph Bergmüller1, Roger Schürch, Ian M Hamilton
1Department of Biology, University of Neuchâtel, 2009 Neuchâtel, Switzerland. ralph.bergmueller@unine.ch
Summary
Animal personality, or consistent individual differences in behavior, influences cooperation. This behavioral variation can either stabilize or disrupt cooperation, making it crucial for understanding its evolution.
Area of Science:
- Behavioral Ecology
- Evolutionary Biology
- Animal Behavior
Background:
- Cooperative behaviors are often assumed to be flexible and conditional.
- However, many species exhibit consistent individual differences in cooperative and non-cooperative behaviors, a phenomenon termed 'animal personality' or 'behavioral syndrome'.
- Animal personality is evolutionarily significant due to heritable variation and fitness consequences.
Purpose of the Study:
- To review empirical evidence for individual variation in cooperative behavior across taxa.
- To examine evolutionary processes explaining this variation.
- To discuss the impact of consistent individual differences on the evolutionary stability of cooperation.
Main Methods:
- Literature review of empirical studies on animal personality and cooperation.
- Analysis of evolutionary theories explaining behavioral variation.
- Synthesis of findings on the consequences of individual differences for cooperation.
Main Results:
- Cooperative behaviors are often less flexible than assumed, with consistent individual differences prevalent across species.
- Individual variation in cooperativeness can arise from various evolutionary processes.
- Consistent individual differences in cooperativeness can stabilize or disrupt cooperation within populations.
Conclusions:
- Recognizing consistent individual differences in cooperativeness is essential for understanding the evolution and prevalence of cooperation.
- Animal personality plays a dual role in the evolutionary stability of cooperation.
- Further research is needed to fully elucidate the interplay between individual variation and cooperative strategies.
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