Evolutionary ecology

Extra-pair paternity facilitates cooperation in pied flycatchers – discussion arising

The paper published earlier this year showing that infidelity can promote cooperation among male pied flycatchers has sparked some discussion.

Female pied flycatcher
Female pied flycatcher
Alpo Roikola (Wikimedia Commons)

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Original paper:

Krams, I. A., Mennerat, A., Krama, T., Krams, R., Jõers, P., Elferts, D., Luoto, S., et al. 2022. Extra-pair paternity explains cooperation in a bird species. Proceedings of the National Academy of Sciences of the USA, 119: e2112004119. doi:10.1073/pnas.2112004119.

Commentary by Lifjeld and Slagsvold:

Lifjeld, J. T., and T. Slagsvold. 2022. Female extra-pair copulation for direct fitness benefits: A cautionary note. Proceedings of the National Academy of Sciences 119:e2207108119. doi: 10.1073/pnas.2207108119.

Reply by Eliassen and others:

Eliassen, S., T. Krama, S. Luoto, R. Krams, A. Mennerat, P. Jõers, D. Elferts, et al. 2022. Reply to Jan T. Lifjeld et al.: Female agency and fitness benefits of mixed-paternity broods remain. Proceedings of the National Academy of Sciences 119:e2207741119. doi: 10.1073/pnas.2207741119