The Population Consequences of Polygyny in the Ant Leptothorax curvispinosus

Author: WILSON EDWARD O.  

Publisher: Entomological Society of America

ISSN: 1938-2901

Source: Annals of the Entomological Society of America, Vol.67, Iss.5, 1974-09, pp. : 781-786

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Abstract

In colonies of the ant, Leptothorax curvispinosus Mayr, the number of eggs in the standing crop appears to increase principally with the number of queens, but the number of larvae, and hence the colony growth rate, is independent of the number of queens, depending instead primarily on the size of the worker population. Hence the average reproductive potential of individual queens falls off linearly with an increase in their number. On the other hand, the presence of supernumerary queens lengthens the survival time of colonies. The latter circumstance alone, if combined with a higher degree of genetic relatedness among coexisting queens, counteracts the lowered per-queen reproductive potential and could be sufficient to favor polygyny in natural selection.