Changes in the Biology of Culex tarsalis (Diptera: Culicidae) Associated with Colonization Under Contrasting Regimes

Abstract
A 2-yr study evaluated changes in life-history parameters, electrophoretic characteristics, reproductive behavior, and mating competitiveness that occurred when Culex tarsalis was colonized in constant or variable rearing environments. The ability to reproduce and to demonstrate mating competitiveness under laboratory conditions developed more rapidly in colonies held under constant conditions than in those held under variable conditions. Genetically, colonies reared under variable conditions remained more like the parental strain than those reared under constant conditions. Assortative mating occurred regardless of colonization regime.

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