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Le vol nuptial chez Formica lugubris Zett. (Hymenoptera, Formicidae). 1. Facteurs influençant l 'apparition et l 'envol des sexués
Actes des Colloques Insectes Sociaux
Compte rendu colloque annuel, Londres, 20-22 sept. 1987 éd. par l'Union Internationale pour l'Etude des Insectes Sociaux, Section Française
Nuptial flight in Formica lugubris was studied within a super-colony located in the Swiss Jura. Sexuals (imago) were present in the nests during one month (June). The flight season was ea. 2-3 weeks. The presence of sexuals at nest surface as well as take-off were temperature-dependant, occuring above l0°C and l8°C, respectively. Length of daily flights, number of sexuals leaving the nest as well as number of sexuals produced were estimated. There was no proof of any circadian rhythm and no marked differences between males and females except in mixed nests where females did not fly and copulated at nest surface.
Formica lugubris, nuptial flight, flight season, flight period.
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