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Article Dans Une Revue Comptes Rendus Biologies Année : 2010

Begging coordination between siblings in Black-headed Gulls.

Résumé

Communication behaviours are now considered from a signallers-receivers network perspective. This concept seems well suited to the study of interactions between parents and offspring in birds, so far mainly treated as a dyadic signalling system involving the brood or a single chick as a signaller and the parent as a receiver. Family conflicts over resource allocation drive parent-offspring and sib-sib communication. In the Black-headed Gull Larus ridibundus, parents respond to the whole-brood begging intensity and siblings often synchronize their begging signalling thus limiting individual effort. By monitoring five nests of two-chick broods during the whole rearing period in the nest, we show how an intra-brood simultaneity of begging emerges from successive phases of solitary begging of junior and senior nestlings. Although this result remains preliminary due to the sample size, it underlines a dynamical aspect of chicks' behaviour. Because they always favour coordinated begging and because they elevate their response threshold across the rearing period, parents may play a major role in the plasticity of begging behaviour.

Dates et versions

hal-01183326 , version 1 (07-08-2015)

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Alain Blanc, Nicolas Ogier, Angélique Roux, Sébastien Denizeau, Nicolas Mathevon. Begging coordination between siblings in Black-headed Gulls.. Comptes Rendus Biologies, 2010, 333 (9), pp.688-93. ⟨10.1016/j.crvi.2010.06.002⟩. ⟨hal-01183326⟩
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