[Variability of the dimensional structure in the hemipopulation of Thominx neopulchra (Nematoda: Capillariidae) females from bats of the genus myotis (Chiroptera: Vespertilionidae)].

Variability of the dimensional structure in the hemipopulation Thominx neopulchra females from 3 species of the genus Myotis bats in the Zhiguli State Reserve was examined. The size of T. neopulchra from different bat species varied within the limits constituting 10.

[Fecundity of Thominx neopulchra (Nematoda:Capillariidae) from bats of the genus Myotis (Chiroptera:Vespertilionidae)].

Variability of absolute fecundity of nematode Thominx neopulchra from three species of genus Myotis was studies on the territory Zhiguli State Reserve in 2007, 2008. Significant differences in the fecundity of the nematode females depending on host species and sex, size of the parasite, number of the helminthes in a given host, and season of year were revealed.

[Characteristic of reproductive structure in the hemipopulation of a bat-parasitizing nematode Thominx neopulchra (Nematoda, Capillariidae)].

Features of reproductive structure of the Thominx neopulchra hemipopulation from Daubenton's bat from Zhiguli State Reserve are studied. It is established, that females and males of Th. neopulchra have different dynamics of coming in the host population.

[Age structure and dynamics of abundance of the adult Trematode Opisthioglyphe ranae (Fasciolida, Plagiorchidae) hemipopulation in lake frog from the Saratov reservoir].

Age structure and dynamics of abundance of adult Opisthioglyphe ranae, a parasite of intestine of lake frog, are analyzed. In the period of activity of the host (May-October), the hemipopulation of O. ranae maritae is represented by two generations, which are situated in host lesser than one year and differ from each other in the rate of maturation.

[The reproductive structure of groupings of the parasitic nematode Camallanus truncatus and the factors determining its alteration].

The reproductive structure of the nematode Camallanus truncatus in the population of the perch Perca fluviatilis in dependence upon host's size and seasons was studied. It is recovered, that only the bigger sized host groups influence the formation of reproductive-functional structure of the C. truncatus hemipopulation.

[The structure of fish helminth populations].

Typification and some qualitative characteristics of populations of the fish helminths are given which allow to explain some peculiarities of their numbers, genetical interrelations, action of immunological factor. Simplification of the structure of helminth populations provokes large fluctuations of the helminths number. Differences in the structure of helminth populations are to be considered as one of mechanisms of development of stability of parasitic system.

[The population and genetic relationships in the bream-Digramma interrupta system (pl.) (Cestoda: Ligulidae)].

It was established that host individuals, characterized by a high stability of development, play the main part in the functioning of bream-D. interrupta system. Heterozygous breams turned out to be more stable to the effect of pleurocercoids than homozygous ones.

[The spatial structure and interrelation of plerocercoids of Digramma interrupta (Cestoda, Ligulidae) and the bream (Abramis brama) in the Kuibyshev reservoir].

The character of the distribution of the plerocercoid D. interrupta in the bream Abramis brama from the Kuibyshev water reservoir was studied. The spread of the parasites in A.

[Distribution and mechanism of the regulation of the pleurocercoid population count of Triaenophorus nodulosus (Cestoda, Triaenophoridae)].

The character of the distribution of pleurocercoids of Triaenophorus nodulosus depending on the host age is shown. Their distribution in perch at the age of 0+-4+ is over dispersed in its character and is described by negative binomial. At the age of 5+ to 8+ the distribution of parasites is of regular character that is apparently due to changes in the mechanism of regulation of the parasites number.