Data from: Kin selection, not group augmentation, predicts helping in an obligate cooperatively breeding bird

Lucy E. Browning, Samantha C. Patrick, Lee A. Rollins, Simon C. Griffith & Andrew F. Russell
Kin selection theory has been the central model for understanding the evolution of cooperative breeding, where non-breeders help bear the cost of rearing young. Recently the dominance of this idea has been questioned; particularly in obligate cooperative breeders where breeding without help is uncommon and seldom successful. In such systems, the direct benefits gained through augmenting current group size have been hypothesised to provide a tractable alternative (or addition) to kin selection. However, clear empirical...
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