Honest begging in the blue-footed booby: signaling food deprivation and body condition

@article{Villaseor2006HonestBI,
  title={Honest begging in the blue-footed booby: signaling food deprivation and body condition},
  author={Emma Villase{\~n}or and Hugh Drummond},
  journal={Behavioral Ecology and Sociobiology},
  year={2006},
  volume={61},
  pages={1133-1142}
}
To determine whether solicitation by blue-footed booby chicks accurately encodes their need for food, we independently manipulated the body condition and recent food ingestion of singleton chicks and recorded three measures of begging. Variations in the three measures of begging covaried only partially, but in general, chicks begged more intensely when they were in poor body condition and also when suffering recent food deprivation. Effects of body condition and recent food deprivation on… 

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