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Year 2007, Volume 41, Issue 1
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Issue 1
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Materials on the preimaginal stages of the ticks collected from small mammals in Western and Northern Caucasus (Acari: Ixodidae). P. 3-22.
The exact identification of the preimaginal stages of the ticks collected from small mammals in Western and Northern Caucasus as a result of ten-year route investigations allowed us to obtain new data on the geographic ranges, altitude and biotopic preferences, and host-parasite relations of 11 species. A wide range of the joint occurrence (in the same locality, on the same host species, on the same host individual) is recorded for the first time for 10 species. The cohabitation of the each of 10 species with other 2—9 species has been found. The number of the cases of joint occurrence of different ixodid species on the same host individual is proportionate to the collection period in one locality. The cohabitation did not observed only for the species Ixodes ghilarovi, a high mountain ixodid species, which is for the first time recorded in 7 localities of Northern and Western Caucasus.
in Russian
Morphofunctional changes in the midgut of the Ixodes ricinus nymphs (Acari: Ixodidae) during developmental diapause. P. 23-27.
Changes in the midgut of the Ixodes ricinus nymphs at the stage of developmental diapause were studied. It is established, that the midgut of the tick nymphs undergoes the identical and synchronous changes at the development without diapause and in the state of diapause. In 7—8 months after feeding the midgut of the nymphs contains the digestive cells with gematine and food inclusions, as well as reserve cells, like the midgut of unengorged moulted female. But the midgut of diapausing nymphs retains such condition during the whole period of diapause.
in Russian
The taxonomic diversity of the parasites of agnathans and fishes in the Volga basin. III. Aspidogastrea and Trematoda. P. 28-54.
A checklist of Aspidogastrea and Trematoda parasitizing fishes in the Volga basin is given. The checklist includes host species names for the each parasite and data on the occurrence of parasites in different parts of the Volga basin. The data on trematodes from 69 fish species are presented. The list containes 107 species and 1 subspecies names of trematodes, and 1 species of Aspidogastrea. The family Diplostomidae is represented by the most number of species (22). Six species of trematodes (Amurotrema dombrovskajae, Sanguinicola skrjabini, Nicolla skrjabini, Plagioporus skrjabini, Apophallus muehlingi, Rossikotrema donicum) have been introduced into Volga River along with aclimatizated fishes or penetrated into its basin by self-migration to new water bodies.
in Russian
Opisthorchis felineus (Rivolta, 1884) и Metorchis bilis (Braun, 1890) infections in population of some regions of the Ob River basin. P. 55-64.
The incidence of Opisthorchis felineus (Rivolta, 1884) and Metorchis bilis (Braun, 1890) infections among people living in several regions of the Ob River basin in the West Siberia has been assesed in this work. Our results suggest that Metorchis bilis infection was common in many of the serologically tested people. Moreover, this helminth was obtained from the biliary ducts of humans in autopsy.
in Russian
The effect of the homogenates from different developmental stages of the nematode Protostrongylus rufescens (Leuckart, 1895) on mitochondrial and lipid bilayer membranes. P. 65-71.
The effect of the homogenates from different developmental stages of the nematode Protostrongylus rufescens on mitochondrial and lipid bilayer membranes has been studied. The homogenate of P. rufescens affects efficiently the cell energy by the inhibition of the mitochondrial respiration in the metabolic state V3, uncouples oxidative phosphorylation and affects the functions of mitochondria at the level of cyclosporine A-sensitive pore by making it highly permeable. Moreover, the nematode homogenate at the concentration of 1 mkg/ml increases efficiently the integral permeability of lipid bilayer membranes. An increase in this permeability is connected apparently with the formation of single ion channels. The channels of lipid bilayer membranes induced by the nematode homogenate show cation selectivity.
in Russian
Parasite fauna of young landlocked salmon (Salmo salar m. sebago Girard) in the Pista River (the White Sea basin). P. 72-77.
A native population of landlocked salmon of the Pista River was investigated in 2000—2002. Adult salmon in Pista River has smallest size among other populations of landlocked salmon in Karelia. Data on the biology and parasite fauna of young salmon are presented. The presence of local salmon populations in lakes of the river system is apparently one of the mechanisms keeping the magnitude of population. The presence of Gyrodactylus salaris, a harmful parasite of the young landlocked salmon, is established in this territory for the first time. This monogenean species is believed to have been introduced into the Pista River via stocking from Finland.
in Russian
New species of (Myxosporea: Cnidosporidia) from cottids (Abyssocottidae) and the oilfishes (Comephorus spp.) of Baikal Lake. P. 78-81.
Two new species of Myxosporidia, Myxidium baicalensis sp. n., Myxidium donecae sp. n. are described from the gall bladder of fishes from Baikal. Myxidium baicalensis sp. n. parasitising gobies Cyphocottus megalops, Asprocottus platycephalus, and other host species, while Myxidium donecae sp. n. parasitising Baikal oilfishes Comephorus baicalensis and C. dybowski.
in Russian
First finding of the Centrorhynchus aluconis (Muller, 1780) (Giganthorhynchidae) and Moniliformis moniliformis Bremser, 1811 (Moniliformidae) larvae in shrews (Insectivora: Soricidae) of the fauna of Russia. P. 82-85.
The larvae of acanthocephalans Centrorhynchus aluconis (Muller, 1780) and Moniliformis moniliformis Bremser, 1811 are recorded for the first time from shrews in Russia (Samarskaya Luka National Park, Samara Region). Taxonomic descriptions and figures of the specimens examined are presented.
in Russian