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Year 2015, Volume 49, Issue 2
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Issue 1
Issue 2
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The microsporidium Glugea gasterostei Voronin 1974 (Microsporidia: Marinosporidia) from the three-spined stickleback Gasterosteus aculeatus (Actinopterygii: Gasterosteiformes) as an independent species. P. 81-92.
The microsporidium Glugea gasterostei from the three-spined stickleback Gasterosteus aculeatus was described as an independent species basing upon morphological and ecological traits of the parasite (Voronin, 1974), further supported by ultrastructural characters of its spores (Voronin, 1983). During the revision of microsporidia of the genus Glugea (Canning, Lom, 1986; Lom, 2002), the validity of this species was doubted and it was synonymized with G. anomala. Nevertheless, the molecular phylogenetic analysis performed in the present study showed the unique molecular haplotype of small subunit rRNA gene of G. gasterostei (Genbank accession number KM977990) and its close relatedness to G. anomala, G. atherinae and G. hertwigi (sequence similarity of 99.7%). One of typical characters of G. gasterostei, as opposed to G. anomala, is the formation ofxenomas on inner tissues and not on the surface of infected fishes. This feature is retained even after the infection of different host species. Taken together, these data confirm the validity of G. gasterostei as a separate species among closely related taxa that had diverged comparatively recently.
in Russian
Comparative analysis of lipid metabolism indices in some parasites of the white charr (Salvelinus albus) from the Lake Krinotskoe. P. 93-97.
Comparative study of lipid metabolism indices (total lipids, separate lipid fractions, level of the lipid peroxidation processes, and antioxidant protection) was carried out in three parasite species collected from the white char in the Lake Kronotskoe: Diphyllobothrium ditremum Crepin, 1825 (Cestoda), Philonema oncorhynchi Kuitunen-Ekbaum, 1933 (Nematoda) и Neoechinorhynchus salmonis Ching, 1984 (Acanthocephala). Acanthocephalans possessed significantly greater levels of total lipids, triacylglycerol, and malondialdehyde; nematodes, of cholesterol and sterol esters; and cestodes, in phospholipids and constants of the substrate oxidation. Dependence between lipid metabolism of helminths and their taxonomic affiliation, morpho-functional features, the stage of the life cycle, and the site of infection in the host are discussed.
in Russian
Helminths of the common roach (Rutilus rutilus Linnaeus, 1758) and the European perch (Perca fluviatilis Linnaeus, 1758) in the Lake Terkhiin Tsagaan (Mongolia). P. 98-103.
The article provides data about helminthes of the common roach and the European perch in the Lake Terkhiin Tsagaan (Mongolia). Six parasite species were found. Data on the occurrence of the trematode species and larvae of Streptocara crassicauda are obtained for the first time. Species composition of Diplostomum spp. metacercariae parasitizing in fish eyes is updated.
in Russian
Variability and determining factors of the body size structure of the infrapopulation of Cosmocerca ornata (Nematoda: Cosmocercidae) in marsh frogs. P. 104-118.
Variability of the body size in females of the Cosmocerca ornata (Dujardin, 1845), a parasite of marsh frogs, is studied. The influence of both biotic (age, sex and a phenotype of the host, density of the parasite population) and abiotic (a season of the year, water temperature) factors on the formation of the body size structure in the C. ornata hemipopulation (infrapopulation) is demonstrated. The body size structure of the C. ornata hemipopulation is characterized by the low level of individual variability as within certain subpopulation groups of amphibians (sex, age and phenotype), so within the population of marsh frogs as a whole. The more distinct are the differences in biology and ecology of these host subpopulations, the more pronounced is the variability in the body size of С ornata.
in Russian
New findings of bat ectoparasites (Chiroptera: Vespertilionidae) in Southern Siberia. P. 119-127.
The data on new findings of ectoparasites (mites and insects) of bats (Chiroptera: Vespertilionidae) in the Western Sayan and Tuva are represented. The bat fly Basilia mongolensis mongolensis Theodor, 1966 was discovered in the territory of Russia for the first time. Gamasid mite Spinturnix bregetovae Stanyukovich, 1995 is new for the region. New hosts were described for some ectoparasites.
in Russian
Reaction of haemocytes of the mollusk Planorbarius corneus to a xenotransplant. P. 128-132.
Tissue reaction of the mollusk Planorbarius corneus to the introduction of a transplant (cat vibrissa) was examined. The transplant was introduced into mollusk tissues with the use of an injection needle. After a day, flattened haemocytes were found on the surface of the transplant. The wound channel formed by the needle was arrested by a capsule formed of 5—15 layers of flattened cells. The cavity of the wound channel and the core of the vibrissa were also filled with haemocytes. During incubation of the vibrissa in vitro, adhesion and sedimentation of haemocytes on its surface was observed.
in Russian
Korenberg E.I., Pomelova V.G., Osin N.S. Infections with natural focality transmitted by ixodid ticks. P. 133-137.
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in Russian
Burdukovskaya T.G., Pronina N.M. Copepod fish parasites (Crustacea: Copepoda) in the Lake Baikal and its basin. P. 137-139.
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in Russian