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Year 2007, Volume 41, Issue 4
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Issue 1
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Taxonomic composition and landscape-biotopical distribution of black flies (Diptera, Simuliidae) in the Khemchik river basin (Western Tuva). P. 241-252.
Taxonomoc composition and altitude distribution of black flies have been investigated in the top and middle stream of the Khemchik river, Western Tuva. Similarity with adjacent territories by the species composition is revealed. A dependence of the blackfly abundance on the stream characteristics (water temperature, flow velocity, grading of soil, electric conductivity of water, and presence of epibioses), as well as on the hydrobiology characteristics of the localities is shown. The comparison of blackfly complexes from the upper part of the Sayano-Shushenskoe reservoir and the Todzha depression, Tuva, is carried out.
in Russian
On the fauna and ecology of mosquitoes (Diptera: Culicidae) in forest-steppe and steppe regions of Western Siberia. P. 253-267.
Fauna and ecology of the mosquitoes from the southern forest-steppe (Chany Lake) and the northern steppe (Karasuksky lakes) have been investigated during 2004—2006. Species composition, dominant species, biotopical and seasonal distribution are examined. Detailed data on the biotopical and seasonal distribution, sex ratio and terms of development for the dominant species Coquillettidia richiardii (Ficalbi, 1889) are reported.
in Russian
Larval identification of species and subspecies of the genus Hyalomma (Acari: Ixodidae) from Russia and neighbouring territories. P. 268-283.
The following species and subspecies of Hyalomma Koch, 1844 are recorded from Russia and neighbouring territories, including those involved in natural foci of tick-borne diseases: H. (Hyalomma) aegyptium (Linnaeus, 1758), H. (Euhyalomma) dromedarii Koch, 1844, H. (Euh.) asiaticum asiaticum Schulze et Schlottke, 1930, H. (Euh.) asiaticum caucasicum Pomerantzev, 1940, H. (Euh.) asiaticum kozlovi Olenev, 1931, H. (Euh.) anatolicum Koch, 1844, H. (Euh.) excavatum Koch, 1844, H. scupense Schulze, 1918, H. (Euh.) marginatum marginatum Koch, 1844, H. (Euh.) marginatum turanicum Pomerantzev, 1946, and H. (Euh.) marginatum rufipes Koch, 1844. The geographic distribution and host-parasite relationships of each taxon are discussed. Species characters of the larval stage, that can be distinguished using light microscopy, are found to be very few. These characters include shape of scutum, shape and rate of hypostome denticulation, shape and rate of the development of spurs on coxae I to III. Measurements of some morphological structure and their rations show statistically significant differences between some closely related species, even if qualitative discriminating characters are unknown. Only measurements and their ratios can be used for the discrimination of larval H. anatolicum from larval H. excavatum, because qualitative discriminating features have not been found for these species. The complex structure of the subspecific morhological differentiation of all parasitic stages in the polymorphic species H. asiaticum and H. marginatum is revealed. This structure probably reflects some peculiarities of the microevolutionary processes. Identification key for the larval stage of seven Hyalomma species is provided.
in Russian
Hostage and structure of the component communities of parasites in river minnow Phoxinus phoxinus (L.). P. 284-298.
Species composition and structure of the communities of fish parasites in river minnow Phoxinus phoxinus (L.) from the Pechora river were investigated in two of the Pechora-Ilychsky Biosphere Nature Reserve, Komi Republic. The component communities of the parasites in river minnow are shown to have a one-year cycle including the states of development, completion, and destruction. Communities in the state of development are characterized by a low variety of species, low values of Shannon index, often high values of domination index, presence of only two groups of parasites in the structure described by variational curved of the conditional biomasses of species, deviation of the conditional biomasses of species from the linear regression, and sum of errors of the regression equations lower a threshold value. The communities consist of young individual parasites and their larval stages. Completed community is characterized by the following properties. There are three groups of parasites, differing in allometric index, in the structure, discerned by the ratio of conditional biomasses of the species included. Conditional biomasses of species in ecologically safe reservoirs lie on the segments of straight lines. Species variety reaches its maximum. Species are presented mainly by mature specimens and larval stages of the parasites using fish as intermediate host. Community in the state of destruction shows low values of domination index and relatively small variety pf species. Such community is consist of one or two groups of species, which are represented by mature, oviparous, and dying individuals. There are larval stages of parasites using fish as intermediate hosts. Dominant species or species groups, as well as values of indexes describing the component communities of parasites, can be different in mature river minnow from different geographical regions. However, the number of groups of parasites, formed by the ratio of conditional biomasses, remains constant, and sum of errors of the regression equations characterizing the communities is always below 0.25. Component communities of parasites in young river minnows differ from the communities in mature fishes by lower variety of species, lower biomass, and lower number of individual parasites. The communities of parasites in 0+ old fishes are often characterized by lesser number of groups of parasites, classified by the ratio of their biomasses, and presence of two dominate species. It is often impossible to count the sum of errors of the regression equations describing spread in values of biomasses of the species forming the community.
in Russian
Fine structure of the cirrus sac and vagina of progenetic Diplocotyle olrikii (Cestoda: Spathebothriidea). P. 299-308.
Ultrastructural characteristics of the cirrus sac and vagina of progenetic and monoxenic spathebothriidean tapeworm, Diplocotyle olrikii from the body cavity of Gammarus oceanicus are described. Five loosely arranged muscle layers make up the cirrus sac wall. The nucleated syncytial cytoplasm of the ejaculatory duct's wall has apical lamellae and 3 well-developed muscular layers under epithelim. Numerous prostate ducts pass through syncytial epithelium of it. The numerous prostate glands are localized around cirrus sac. Unique morphology of the prostate granules with an electron-dense core surrounded by a matrix of lower density is revealed for the spathebothriidean tapeworms. The epithelial lining of the cirrus in D. olrikii is nucleated and also is connected to subsurface sunken perikarya. The apical surface of the cirrus is covered with small cone-shaped microtriches. Well-developed 10 closely arranged muscle layers support the cirrus. Three regions of the vagina are distinguished. The distal part of vagina has filamentous microthrix type on the surface similar to tegumental one, as well as middle and proximal regions are covered with small cone-shaped microtriches, reducing in their number to proximal part. Anucleate epithelial lining of vagina is connected to numerous sunken parikarya. The cirrus and vagina epithelial lining has numerous vesicles. A comparison is made of the fine structure of the cirrus sac and vagina of monoxenic and dixenic spathebothriidean species. Ultrastructural data on the cirrus sac and vagina of the Spathebothriidea are compared with those for monozoic and polyzoic cestodes. The ultrastructural spathebothriidean features are discussed.
in Russian
Corynosoma hannae Zdzitowiecki, 1984 — a parasite of sea leopard from the Pacific sector of Antarctic. P. 309-316.
Specimens of the acanthocephalan Corynosoma hannae Zdzitowiecki, 1984 from the Pacific (Balleni islands) and Atlantic (South Shetland) sectors of Antarctic are compared with those from the Pacific sector of Subantarctic (Auckland and Campbell islands). Probably New Zealand sea lion Phocarctos hookeri (Gray, 1844) is the secondary definitive host for Corynosoma hannae. Description and figures of the specimens examined are provided.
in Russian
Parasite fauna of the European river lamprey Lampetra fluviatilis (L.) from Lake Onega. P. 317-321.
Data on the parasite fauna of the adult European river lamprey Lampetra fluviatilis (L.) from Lake Onega are reported. Ten parasite species are found, including trematodes Diplostomum petromyzifluviatilis and D. spathaceum (metacercariae), cestode Proteocephalus longicollis, nematodes Cucullanus truttae and Raphidascaris acus, acanthocephalan Echinorhynchus salmonis, ectoparasitic infusoria Chilodonella hexastica, Trichodina tenuidens, and Trichodinella epizootica, and fungus Saprolegnia parasitica. Three species are found to be dominate, namely D. petromyzifluviatilis, Cucullanus truttae, and P. longicollis. Comparative analysis of the parasite faunas of the lampreys from other basins is carried out. Some similarity in the parasite faunas of lampreys and salmonids is discovered.
in Russian
V.P. Sergiev, Yu.V. Lobzin, S. S. Kozlov (eds). Parasitic diseases of man (protozooses and helminthiases): A guide for doctors. Foliant. 2006. P. 322-324.
Summary is absent.
in Russian