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. 1980 Jun 6;208(4448):1157-9.
doi: 10.1126/science.208.4448.1157.

Sex ratio adaptations to local mate competition in a parasitic wasp

J H Werren

Sex ratio adaptations to local mate competition in a parasitic wasp

J H Werren. Science. .

Abstract

Females of the parasitic wasp Nasonia vitripennis adjust the sex ratio of their broods according to whether they are a first or second wasp to parasitize a host. The first wasp produces a strong daughter bias. The second wasp adjusts the prorportion of sons to the relative level of local mate competition, as predicted by a natural selection model. The results provide a quantitative test of sex ratio theory.

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