Local resource enhancement and sex ratios in a primitively social bee

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94 Citations (Scopus)

Abstract

'Queen-worker conflict'1 and 'local mate competition' 2,3 have frequently been used to help explain female-biased sex ratios in the social Hymenoptera. In this report I show that neither of these theories is able to explain brood-size dependent sex ratios in an allodapine bee, Exoneura bicolor. Most nests of this species contain two or more related females, and reproductivity per female increases as a function of the number of individuals cooperating in joint nest use. I argue that 'local resource enhancement' may explain sex-ratio bias in this species and that similar bias may be expected in other presocial insects.

Original languageEnglish
Pages (from-to)346-348
Number of pages3
JournalNature
Volume331
Issue number6154
DOIs
Publication statusPublished - 28 Jan 1988
Externally publishedYes

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