Abstract
In cross-breeding experiments with 3 strains of Aedes (S.) polynesiensis Marks, females of the Samoan strain which had been inseminated by males of the Taiaro and Tahiti strains had greatly reduced fertility rates. Although normal numbers of eggs were laid, only 5% hatched. Eggs produced by Tahiti females inseminated by Samoan males showed a somewhat reduced hatching rate. In the crosses between the Taiaro females and Samoan males, and between the Taiaro and Tahiti strains in both directions, fertility rates of the females, egg production, and hatching rates were normal. The reduced numbers of F1 progeny produced by the cross-inseminated Samoan females were genetically compatible with the parent strains. Thus, these populations are conspecific; however, some genetic divergence appears to have taken place as a result of insular isolation. The results also suggest that the Tahiti and Taiaro populations are more closely related to one another than either is to the Samoan strain.
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