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Release of Chemosterilized Males for the Control of Anopheles Albimanus in El Salvador

IV. Dynamics of the Test Population^*,,

D. E. Weidhaas, S. G. Breeland, C. S. Lofgren, D. A. Dame AND R. Kaiser^||

Data obtained in a sterile male release experiment in El Salvador against Anopheles albimanus Wiedemann were used to determine the absolute density of mosquitoes in the release area, the rates of growth of the population, the competitiveness of released males, the survival of the various stages of the mosquito, and the ability of the mosquitoes to transmit malaria. In the dry season, absolute densities of A. albimanus were low. The rates of growth of the population in the test area also were low throughout the year (0.4 x–4.8 x). Sterile males were as competitive as normal males in large cage studies but were less than fully efficient in mating with native females under natural field conditions. Rates of survival of immature stages (egg through pupae) of the mosquito ranged from 0.020 to 0.150; the estimated average daily survival of adult females ranged from 0.65 to 0.91. With these estimates, it was possible to construct models of population dynamics and vector capacity.

Accepted for publication September 1, 1973.

^* This research was supported in part by contract funds from the Army Medical Research and Development Command.

This paper reflects the results of research only. Mention of a pesticide in this paper does not constitute a recommendation of this product by the USDA.

Insects Affecting Man Research Laboratory, Agr. Res. Serv., USDA, Gainesville, Florida 32604.

Central America Malaria Research Station, San Salvador, El Salvador, Malaria Program, Center for Disease Control, Health Service and Mental Health Administration, Public Health Service, U. S. Department of Health, Education, and Welfare, Atlanta, Georgia 30333. This program was supported by the Agency for International Development, U. S. Department of State.

^< Malaria Program, Center for Disease Control, Health Service and Mental Health Administration, Public Health Service, U. S. Department of Health, Education, and Welfare, Atlanta, Georgia 30333.