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Science 17 May 1985:
Vol. 228. no. 4701, pp. 896 - 898
DOI: 10.1126/science.228.4701.896
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Articles

Sex Ratio Adjustment in Fig Wasps

EDWARD ALLEN HERRE 1

1 Smithsonian Tropical Research Institute, Post Office Box 2072, Balboa, Republic of Panama, and Department of Biology, University of Iowa, Iowa City 52242

The effects of inbreeding and local mate competition have often been confounded in theoretical and empirical studies of sex ratio. A general model considering the interplay of their influences on sex ratio evolution is presented, and its predictions are compared with data collected from three fig wasp species. The results indicate that female fig wasps adjust the sex ratio of their offspring in response to both the intensity of proximate local mate competition and the level of inbreeding in the population.

Submitted on February 14, 1984
Accepted on March 7, 1985


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