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Digest: Evolution of redirected help in a viscous population
Shriza Rai1, Geetanjali Mishra1
1Ladybird Research Laboratory, Department of Zoology, University of Lucknow, Lucknow, India.
Abstract:
When broods fail, parents may assist neighbors' offspring, a behavior called redirected helping that is observed in many species. Flatrès and Wild (2025) used inclusive fitness models to study this behavior. They showed that redirected helping can evolve in viscous populations, where individuals stay near their birthplace, increasing relatedness and competition among neighbors, especially when helping costs are low. Life-history traits like survival, dispersal, and brood-failure rates shape this behavior. Interestingly, survival benefits from helping can outweigh reproductive gains, challenging assumptions and providing fresh insights into cooperative breeding dynamics.
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