Main content area

Changes in host-seeking behavior of Puerto Rican Aedes aegypti after colonization

Clark, Gary G., Bernier, Ulrich R., Allan, Sandra A., Kline, Daniel L., Golden, Frances V.
Journal of medical entomology 2011 v.48 no.3 pp. 533
Aedes aegypti, acetone, behavior change, eggs, females, hands, host seeking, insect attractants, introduced species, lactic acid, odors, olfactometry, volunteers, Florida, Puerto Rico
The effects of colonization on host-seeking behavior of mosquitoes was examined by comparing attraction responses of newly colonized Aedes aegypti (L.) from Þeld-collected eggs in Puerto Rico to that of the Gainesville (Florida) strain, originally from Orlando (Florida) and in colony since 1952. Females from the Orlando and the F0 through F10 generations of the Puerto Rico strain were evaluated using attractant odors in a triple-cage dual-port olfactometer. Two attractant sources were used: odors from the hand of a volunteer and a standard blend of L-lactic acid, acetone, and dimethyl disulÞde. Convergence of the percentage of attraction responses occurred around the F4ÐF6 generations of the Puerto Rico strain. Both the Orlando and Puerto Rico strains exhibited similar responses for tests with the remaining F7ÐF10 generations. A temporal effect on mosquito responses was observed for both strains regardless of the attractant blend used in tests. This study indicates that Ae. aegypti host-seeking behavior changes signiÞcantly over the Þrst four to six generations after introduction into the laboratory, whereas the Þeld-collected strain increases in attraction response until it stabilizes at a new level.