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  • 1
    ISSN: 1420-9098
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Description / Table of Contents: Summary Reversals in the direction of food flow can be observed in theCamponotus vagus Ant during a single trophallactic contact between two foragers. These reversals are accompanied by changes in the position and movements of the mandibles, antenn≸, palps and legs. This behaviour was observed in only 27% of the pairs studied. Pairs accustomed to reversing the trophallactic food flow also shared food significantly more frequently and devoted significantly more time to this activity. If two different societies are compared at the same time of year the frequency of trophallactic contacts and the time spent on this activity are the same for food-flow reversing worker pairs in both societies; whereas differences were noted between societies in the case of non-reversing pairs. Individuals that practised reversal moreover showed other behavioural characteristics: they were more aggressive, towards a worker from another society which was introduced into the foraging area outside their nest.
    Notes: Resume Chez la FourmiCamponotus vagus, on peut observer des inversions du sens du flux alimentaire lors d'un contact trophallactique entre deux ouvrières récolteuses. Ces inversions sont accompagnées de changements dans la position et les mouvements des appendices. Ce comportement a été observé seulement chez 27% des couples étudiés. Les couples qui inversent le sens du flux trophallactique pratiquent, de manière significative, des contacts plus fréquents et passent plus de temps en contacts. Lorsqu'on compare à une même saison deux sociétés différentes. la fréquence des contacts trophallactiques et le temps passé en contacts ne diffèrent pas pour les couples d'ouvrières qui pratiquent des inversions; par contre, des différences apparaissent en ce qui concerne les couples ne présentant pas ce comportement. D'autre part, les individus qui pratiquent des inversions présentent d'autres particularités comportementales: ils se montrent plus agressifs vis-à-vis d'une ouvrière étrangère à leur société, introduite sur l'aire de récolte de leur nid.
    Type of Medium: Electronic Resource
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