title: Sex ratio evolution in a variable environment.
abstract: We develop a natural selection model for sex ratio control in a spatially variable environment. Predictions of sex ratio alteration as a function of environmental change are tested in laboratory experiments with two parasitic wasps. Field data from a variety of other organisms also support the model. Finally, we discuss possibilities and difficulties for testing this type of evolutionary model.
mesh_terms: D000818:Animals; D005075:Biological Evolution; D004777:Environment; D006790:Host-Parasite Interactions; D006927:Hymenoptera / Q000502:physiology*; D008957:Models, Genetic; D011157:Population Dynamics; D012744:Sex Ratio; D014863:Wasps / Q000502:physiology*