No reduction in aggression after loss of a broodmate: a test of the brood size hypothesis

@article{Drummond2008NoRI,
  title={No reduction in aggression after loss of a broodmate: a test of the brood size hypothesis},
  author={Hugh Drummond and Cristina Rodr{\'i}guez},
  journal={Behavioral Ecology and Sociobiology},
  year={2008},
  volume={63},
  pages={321-327}
}
In some vertebrate species, parents create a large brood or litter then, in the event of unfavourable ecological conditions, apparently allow the number of offspring to be adaptively reduced through siblicide. But how is sibling aggression regulated so that deaths occur only in unfavourable conditions? One proposed mechanism is brood size-dependent aggression. Two experiments tested for this mechanism by reducing three-chick broods of blue-footed boobies either during or after the period of… 
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