Social bet-hedging in vampire bats

Citation

Material Information

Title:
Social bet-hedging in vampire bats
Series Title:
Biology Letters
Creator:
Carter, Gerald G.
Farine, Damien R.
Wilkinson, Gerald S.
Publication Date:
Language:
English

Subjects

Subjects / Keywords:
Biological Markets ( local )
Centrality ( local )
Cooperation ( local )
Bet-Hedging ( local )
Reciprocity ( local )
Social Networks ( local )
Genre:
serial ( sobekcm )

Notes

Abstract:
Helping kin or nonkin can provide direct fitness benefits, but helping kin also benefits indirect fitness. Why then should organisms invest in cooperative partnerships with nonkin, if kin relationships are available and more beneficial? One explanation is that a kin-limited support network is too small and risky. Even if additional weaker partnerships reduce immediate net cooperative returns, individuals extending cooperation to nonkin can maintain a larger social network which reduces the potential costs associated with losing a primary cooperation partner. Just as financial or evolutionary bet-hedging strategies can reduce risk, investing in quantity of social relationships at the expense of relationship quality (‘social bet-hedging’) can reduce the risks posed by unpredictable social environments. Here, we provide evidence for social bet-hedging in food-sharing vampire bats. When we experimentally removed a key food-sharing partner, females that previously fed a greater number of unrelated females suffered a smaller reduction in food received. Females that invested in more nonkin bonds did not do better under normal conditions, but they coped better with partner loss. Hence, loss of a key partner revealed the importance of weaker nonkin bonds. Social bet-hedging can have important implications for social network structure by influencing how individuals form relationships.
Original Version:
Biology Letters, Vol. 13 (2017-05-24).

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Source Institution:
University of South Florida Library
Holding Location:
University of South Florida
Rights Management:
This object is protected by copyright, and is made available here for research and educational purposes. Permission to reuse, publish, or reproduce the object beyond the bounds of Fair Use or other exemptions to copyright law must be obtained from the copyright holder.

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