Sex Ratio Adjustment in Fig Wasps

See allHide authors and affiliations

Science  17 May 1985:
Vol. 228, Issue 4701, pp. 896-898
DOI: 10.1126/science.228.4701.896


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.