Reproductive conflicts in cooperative associations of fire ant queens (Solenopsis invicta)

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Etat: Serval
Version: de l'auteur
ID Serval
serval:BIB_845536A4F071
Type
Article: article d'un périodique ou d'un magazine.
Collection
Publications
Titre
Reproductive conflicts in cooperative associations of fire ant queens (Solenopsis invicta)
Périodique
Proceedings of the Royal Society of London Series B-Biological Sciences
Auteur(s)
Bernasconi G., Keller L.
ISSN
0962-8452
Statut éditorial
Publié
Date de publication
04/1996
Peer-reviewed
Oui
Volume
263
Numéro
1369
Pages
509-513
Notes
Uj573 Times Cited:33 Cited References Count:37 --- Old month value: Apr 22
Résumé
In ants, unrelated queens frequently associate to initiate a colony cooperatively. The joint reproductive effort of the cofoundresses increases growth and survival of the incipient colony. However, such associations are unstable. Soon after emergence of the first workers, queen-queen and queen-worker fights lead to the death or expulsion of all but one cofoundress. Because no sexual offspring are produced in incipient colonies the surviving queen monopolizes the entire future reproductive success of the colony. Two factors, the queens' relative fighting ability and their relative contribution to worker production (assuming that workers can recognize and selectively favour their mother) have been proposed to influence the survival prospects of individual queens within associations. The effect of these two factors was tested in the fire ant Solenopsis invicta. Initial size differences, a potential measure of the queens' fighting ability, affected the outcome of the conflicts, so that the initially heavier queen was more likely to survive. Differential loss of mass by initially equal. nestmates also affected survival, with the queen losing more body mass being more likely to die. The manipulation of the queens' relative contribution to the worker brood did not significantly affect the queens' survival probability, suggesting that workers are unable to favour their mother.
Mots-clé
hymenoptera-formicidae evolution colonies recognition societies nepotism
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Création de la notice
24/01/2008 19:40
Dernière modification de la notice
03/03/2018 18:54
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