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Reproductive Potentials of Dieldrin-Resistant and Susceptible Populations of Anopheles Albimanus Wiedemann^*

A comparison was made between the reproductive potential of the selected dieldrin-resistant El Salvador and the dieldrin-susceptible Panama populations of Anopheles albimanus. The fecundity rate in both was about the same, but the fertility rate was slightly higher for the El Salvador females.

Sexual activity of the two populations was determined by single and multiple choice mating experiments. In general, both males and females of the resistant population from El Salvador appeared to be more aggressive than were the adults of the Panama colony.

This study suggests that the development of dieldrin resistance in the El Salvador population was not accompanied by a loss in competitive advantage through reduced reproductive potential.

^* This work was supported in part by Research Grant AI-00351, National Institutes of Health, USPHS, and by a grant to the Johns Hopkins Medical Center for Medical Research and Training.