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Sex-Ratio Bias in Alates of Polygyne Colonies of the Red Imported Fire Ant Solenopsis invicta Buren (Hymenoptera: Formicidae) in China

Author： Ye J. Lu Y. Xu Y. Zeng L.

Publisher： Springer Publishing Company

ISSN： 0892-7553

Source： Journal of Insect Behavior, Vol.23, Iss.5, 2010-09, pp. : 396-404

Disclaimer: Any content in publications that violate the sovereignty, the constitution or regulations of the PRC is not accepted or approved by CNPIEC.

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Abstract

A sex-ratio bias was studied in alates of natural polygyne colonies of Solenopsis invicta Buren in southern China. The results showed that at the population level, the numbers of male and female alates were nearly equal, even though there was a strong bias toward producing one particular sex at the nest level. For example, 88.89% of the nests sampled were strongly biased toward males or females. In particular, three bias types were observed: extreme female bias, extreme male bias, and a moderate bias. Future studies should address the factors that lead queens to produce strongly biased sex ratios.

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