Ovarian activity correlates with extreme changes in cuticular hydrocarbon profile in the highly polygynous ant, Linepithema humile

Journal of Insect Physiology
Jean-Christophe de BiseauSerge Aron

Abstract

In social insects, cuticular hydrocarbons of adults may vary with ovarian activity. Such variations are suggested to function in the regulation of reproduction within colonies. The modification of the CH profile with ovarian activity is usually interpreted as a signal of fertility causing workers to refrain from reproducing in the presence of the queen. We examined the effect of ovarian activity on the CH profiles in the Argentine ant Linepithema humile, a species where workers lack ovaries and are completely sterile. Our data show considerable differences in the CH profiles between fertile and infertile individuals. These differences are mainly qualitative. The CH profile strongly changes at the start of egg laying, both in mated and unmated queens. These results show that variation in cuticular hydrocarbons with ovarian activity in ants is not restricted to species with worker reproduction. We propose that in the Argentine ant, the cuticular hydrocarbons of laying queens correspond to a signal of fertility involved in the regulation of various aspects of reproduction, such as the rearing of new sexuals.

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Citations

Jul 18, 2009·Journal of Chemical Ecology·Gissella M VásquezJules Silverman
Nov 16, 2011·Journal of Chemical Ecology·Sarah D Kocher, Christina M Grozinger
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