Characteristic features of biodiversity in european ixodid ticks (Acari, Ixodidae) as vectors of diseases with natural foci. P. 161-181.
The diapason of some biodiversity characteristics of ixodid ticks of the fauna of Europe and adjacent territories is analyzed. These characteristics include taxonomic and morphological diversity, the diversity of life cycles, host-parasite relations, species ranges, and biotopic associations. The significance of different aspects of biodiversity of ixodid ticks as a prerequisite of interrelations with pathogens with natural foci is estimated.
in RussianAssemblages of bloodsucking mosquito larvae (Diptera: Culicidae) in water bodies of the northern Kulunda steppe. P. 182-193.
The population structure of bloodsucking mosquito larvae in temporary and constant water bodies of the northern Kulunda steppe was investigated. The seasonal dynamics of the population density, the number of species in different types of reservoirs, and average density of each species are given. The productivity of water reservoirs in relation to mosquitoes of the family Culicidae is analyzed. The basic factors affecting the distribution of larvae of dominant species between different water bodies were revealed. The degree of correlation between the structure of bloodsucking mosquito larva assemblages and the type of the reservoir was established.
in RussianThe influence of ecological factors on the formation of the parasite fauna of the common roach Rutilus rutilus Linnaeus, 1758 in different periods of water abundance in Lake Sartlan (Southwestern Siberia). P. 194-204.
An analysis of the formation of the parasitofauna of the common roach under the influence of various biotic and abiotic environmental factors during three high water cycles observed in the last century is given. Periods of the formation of the enzooty are established.
in RussianSome results of the study of the trematode fauna of the freshwater mollusc Melanopsis praemorsa (L.) from Azerbaijan water bodies. Report 3. New species of the stylet cercaria. P. 205-219.
The structure (illustrated by pictures) and differential diagnoses of 3 new closely related forms of stylet cercaria (Cercaria agstaphensis 8, Cercaria agstaphensis 21 and Cercaria agstaphensis 16) are given. Special attention was paid to the armament of the glandular apparatus, to the excretory and digestive systems, and to other taxonomically important structural peculiarities.
in RussianThe fine structure of the cortical zone in the gregarine Bothriopsides histrio (Eugregarinida: Actinocephalidae). P. 220-233.
Attached and non-attached trophozoites of the septate gregarine Bothriopsides histrio were found in the intestine of the freshwater beetle Acilius sulcatus. Circular folds in the border between proto- and deutomerites and longitudinal striation, running along the entire body of the parasite, were revealed in an optical microscope. Our studies have demonstrated that circular folds, forming a specific collar, are formed of ecto- and endocytes. The longitudinal striation is represented by overdeveloped folds developed by the epicyte and the ectocite. Numerous typical epicite folds were observed over the entire cell surface. Additionally, the symbiosis between gregarine cells and bacteria was revealed.
in RussianIncidence of microsporidian infection of stem borers of the genus Ostrinia (Lepidoptera: Crambidae) in the Krasnodar Territory. P. 234-244.
Infection of corn borers of the genus Ostrinia with microsporidia is found for the first time in Russia. Incidence rates of the last instar larvae of the second generation, sampled under natural conditions in the Krasnodar Territory, is ranged between 3.0 and 17.2 %. When infection incidence rates have been compared between larvae, collected (a) on the western and eastern borders of the region and (b) on dicotyledonous (cocklebur, mugwort) and monocotyledonous plants (maize), no distinct differences were found. Infection rates were maximal in larvae of Ostrinia nubilalis when its population entered the depression phase, yet it did not differ significantly from the values of the previous years. Morphometry characters of the spores allows identifying the parasite species as Nosema pyrausta. These data demonstrate wide dispersal of microsporidia in the populations of stem borers on diverse forage plants within the boundaries of the Krasnodar Territory.
in RussianOn the identification of the species Griphobilharzia amoena Piatt, Blair, Purdie et Melville, 1991, a parasite of crocodiles in Australia. P. 245-252.
The results of the study of typical specimens of the trematode Griphobilharzia amoena from blood vessels of the crocodile Crocodylus johnstoni in Australia are provided. The data obtained on the morphology of this parasite did not confirm the statement of Piatt et al. (1991) that this species belongs to the family Schistosomatidae. Morphological data on G. amoena enable attributing it to the genus Vasotrema of the family Spirorchidae as a new species.
In this connection, the monotypical genus Griphobilharzia (justified by Piatt et al., 1991) becomes a synonym of the genus Vasotrema, while the subfamily Griphobilharziinae becomes a synonym of the subfamily Hapalotrematinae.
in Russian
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