How siblings adjust sib-sib communication and begging signals to each other

Détails

Ressource 1Télécharger: BIB_EE5C1DCE7D43.P001.pdf (426.97 [Ko])
Etat: Public
Version: Final published version
ID Serval
serval:BIB_EE5C1DCE7D43
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Institution
Titre
How siblings adjust sib-sib communication and begging signals to each other
Périodique
Animal Behaviour
Auteur⸱e⸱s
Dreiss A., Lahlah N., Roulin A.
ISSN
0003-3472
Statut éditorial
Publié
Date de publication
2010
Peer-reviewed
Oui
Volume
80
Numéro
6
Pages
1049-1055
Langue
anglais
Résumé
Parents allocate food resources to their offspring in proportion to the intensity of begging behaviour. Begging encompasses several activities including vocalizations that should honestly signal need and jostling for the position in the nest where parents predictably deliver food items. Although siblings are known to adjust begging level to each other, the underlying mechanism remains unknown. We examined this issue in experimental two-chick broods of the barn owl, Tyto alba, a species in which siblings communicate vocally with each other in the prolonged absence of parents. The function of sib-sib vocal communication, so-called sibling negotiation, is to resolve conflicts over which individual will have priority of access to the next delivered indivisible food item. We found that when a nestling produced longer negotiation calls and stood closer to the nestbox entrance in the absence of parents, its sibling vocally negotiated at a lower rate. Additionally, when an individual produced more negotiation calls in the absence of parents, its sibling begged less intensely at the parent's return, with begging being the key factor that determined which nestling obtained a food item. We conclude that position in the nest and the duration of negotiation calls produced in the absence of parents influence the rate of producing negotiation calls, which in turn influences the rate at which siblings beg for food from their parents. Adjusting begging behaviour could therefore depend on complex sib-sib interactions taking place in the prolonged absence of parents.
Mots-clé
barn owl, begging, communication, negotiation, scramble competition, sib-sib competition, Tyto alba
Web of science
Open Access
Oui
Création de la notice
20/05/2011 10:27
Dernière modification de la notice
20/08/2019 16:15
Données d'usage