[The morphological variability coordinated with the population cycle of the widely distributed (the water vole Arvicola terrestris L.) and mountain (the big-eared vole Alticola macrotis Radde) vole species].

This paper presents an analysis of variation of skull size and shape in the course of population cycles of two ecologically different vole species: water vole and high-mountain vole. We have found consistent changes of the direction, rate, and balance of morphogenesis during population cycles. We discuss the role of intra-populational factors and inter-populational variation during the territorial expansion of the species.

[Interaction between three types of variation and fluctuating asymmetry in the population of malaria mosquito Anopheles messeae Fall].

In the population of the malaria mosquito Anopheles messeae, interrelations of three types of variation (polymorphism for inversions, dorsal color of abdomen and thorax, and number of dents in the crests of the stigmal plate) and fluctuating asymmetry were studied. The presence of white pigmentation on the larval dorsum did not correlate with inversion polymorphism and fluctuating asymmetry, but correlated with the number of small and large dents in the crests of stigmal plate. Asymmetry was shown to have a weak positive correlation with the number of dents.

[Variability of pericentromeric chromatin in chromosome 2 of ovarian nurse cells during inbreeding in Anopheles atroparvus V.Tiel].

We investigated the variability of pericentromeric chromatin of chromosome 2 in ovarian nurse cells (trophocytes) in two laboratory lines of malaria mosquito Anopheles atroparvus V. Tiel and in their hybrids. One line had been raised by means of sib inbreeding, the other kept at constantly high population density.

[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.