Initial behavior in colony fragments of an introduced population of the invasive ant Wasmannia auropunctata

We investigated in the laboratory the initial behavior of propagules of the invasive ant Wasmannia auropunctata in Cameroon where it has been introduced. Both workers and queens at first feigned death ( thanatosis), and then the workers slowly moved around the experimental arena; the queens did the...

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Published inComptes rendus. Biologies Vol. 334; no. 7; pp. 572 - 576
Main Authors Mbenoun Masse, Paul Serge, Kenne, Martin, Mony, Ruth, Dejean, Alain, Tindo, Maurice
Format Journal Article
LanguageEnglish
Published Paris Elsevier SAS 01.07.2011
Elsevier
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Summary:We investigated in the laboratory the initial behavior of propagules of the invasive ant Wasmannia auropunctata in Cameroon where it has been introduced. Both workers and queens at first feigned death ( thanatosis), and then the workers slowly moved around the experimental arena; the queens did the same about 10 seconds later. Each queen antennated selected workers that then aggregated together by grasping the hind leg of another ant with their mandibles. When encountering the queen again, the lead worker climbed up the queen's hind leg and onto her back, followed by some other individuals. The remaining workers followed the queen to a location in the experimental arena. When brood was present, the workers transferred it to this location. Orphaned workers did not aggregate, but gathered the brood together and took care of it. By permitting propagules to survive, these behaviors likely contribute to the success of W.  auropunctata as an invader. Nous avons étudié le comportement initial des propagules de la fourmi envahissante Wasmannia auropunctata au Cameroun où elle a été introduite. Tout d’abord les ouvrières et les reines font les mortes ( thanatose), puis les ouvrières bougent lentement dans l’aire expérimentale ; dix secondes plus tard les reines font de même. Chaque reine palpe certaines ouvrières qui forment des agrégats en leur saisissant les pattes postérieures avec leurs mandibules. À la prochaine rencontre avec la reine, la première ouvrière et quelques autres montent sur une patte postérieure de la reine puis sur son dos. Les ouvrières restantes suivent la reine dans un emplacement de l’aire expérimentale où elle s’installe. Les ouvrières transportent le couvain vers la reine. En absence de reine les ouvrières ne s’agrègent pas au début mais regroupent le couvain et en prennent soin. En permettant à la propagule de survivre, ces comportements contribueraient au succès de W.  auropunctata comme envahisseur.
Bibliography:http://dx.doi.org/10.1016/j.crvi.2011.04.002
ObjectType-Article-2
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ISSN:1631-0691
1768-3238
1768-3238
DOI:10.1016/j.crvi.2011.04.002