Polydomy enhances foraging performance in ant colonies.

Détails

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Etat: Serval
Version: Final published version
ID Serval
serval:BIB_592159AB518C
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Polydomy enhances foraging performance in ant colonies.
Périodique
Proceedings of the Royal Societies B. Biological sciences
Auteur(s)
Stroeymeyt N., Joye P., Keller L.
ISSN
1471-2954 (Electronic)
ISSN-L
0962-8452
Statut éditorial
Publié
Date de publication
26/04/2017
Peer-reviewed
Oui
Volume
284
Numéro
1853
Pages
20170269.
Langue
anglais
Résumé
Collective foraging confers benefits in terms of reduced predation risk and access to social information, but it heightens local competition when resources are limited. In social insects, resource limitation has been suggested as a possible cause for the typical decrease in per capita productivity observed with increasing colony size, a phenomenon known as Michener's paradox. Polydomy (distribution of a colony's brood and workers across multiple nests) is believed to help circumvent this paradox through its positive effect on foraging efficiency, but there is still little supporting evidence for this hypothesis. Here, we show experimentally that polydomy enhances the foraging performance of food-deprived Temnothorax nylanderi ant colonies via several mechanisms. First, polydomy influences task allocation within colonies, resulting in faster retrieval of protein resources. Second, communication between sister nests reduces search times for far away resources. Third, colonies move queens, brood and workers across available nest sites in response to spatial heterogeneities in protein and carbohydrate resources. This suggests that polydomy represents a flexible mechanism for space occupancy, helping ant colonies adjust to the environment.

Mots-clé
ants, polydomy, outstations, dispersed central-place foraging, division of labour, Michener's paradox
Pubmed
Web of science
Open Access
Oui
Création de la notice
21/03/2017 18:00
Dernière modification de la notice
08/05/2019 18:59
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