Grandparent helpers: the adaptive significance of older, postdominant helpers in the Seychelles warbler.

@article{Richardson2007GrandparentHT,
  title={Grandparent helpers: the adaptive significance of older, postdominant helpers in the Seychelles warbler.},
  author={David S Richardson and Terry A Burke and Jan Komdeur},
  journal={Evolution; international journal of organic evolution},
  year={2007},
  volume={61 12},
  pages={
          2790-800
        }
}
The possibility that older, often nonreproductive, individuals may engage in kin-directed cooperative behavior has been largely overlooked in the study of cooperative breeding. Here, we describe and investigate the adaptive significance of such "grandparent" helpers in the Seychelles warbler, the first bird species in which this phenomenon has been observed. On Cousin Island, over a period of 24 years, a significant proportion (13.7%) of females, but few males (3.0%), was deposed from dominant… CONTINUE READING
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