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Primary (egg) sex ratios and secondary (adult) sex ratios were compared in colonies of Formica exsecta with different worker sex allocation optima, due to different degrees of relatedness asymmetry among colonies. Fifty-nine colonies were sampled on 3 adjacent islands on the southwest coast of...

Sundström, L.; Chapuisat, M.; Keller, L.
Science (Washington), 1996, 274, 5289, pp 993-995