[Escape reactions and variation in some genetic parameters in larva from the malaria mosquito Anopheles messeae].

The relationship between the escape response and four types of variations--inversion polymorphism, the number of denses in the stigmal plate ridges, their asymmetry, and stripe-nonstripe variation--was studied in larvae of malaria mosquito Anopheles messeae Fall. from natural populations. Pigmented individuals were shown to have a more reduced responce than nonpigmented ones. Asymmetry declined in the direction from unresponsive larvae to those repeatedly (responded). Number of denses was lower in larvae that responded once and higher in those with repeated response. In the latter, variation of this characteristic decreased substantially. The relation of the escape response to inversion polymorphism was most complicated. Larvae that responded a single time did not differe from unresponsive larvae in their chromosomal composition. Among larvae that responded twice, the proportion of heterozygotes 2R01 and 3L01, female XL11, and inversion XL2 increased, and the proportion of female XL01 decreased. Larvae of Anopheles beklemishevi were found to be less responsive than those of A. messeae. The responsiveness of A. messeae is mainly due to heterozygosity.