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Year 1974, Volume 8, Issue 5
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Issue 1
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The state and tasks of the taxonomy of Nematoda. P. 385-393.
For the past 50 years soviet and foreign nematodologists made a considerable success in the elaboration of the natural system of nematodes. However, as regards some orders, suborders and a number of lower taxons, especially taxons containing both free-living and parasitic forms, their taxonomy still remains unsatisfactory. Besides, many non valid species and ungrounded superspecies categories were established. For succesful work in this field are necessary: coordinated researches of taxonomists dealing with different ecological groups of nematodes, profound studies of variability of the main taxonomic characters and morphology on live nematodes during their ontogenesis by use of modern research methods.
in Russian
On the systematic position of trematodes of the genera Acanthatrium Faust, Mesothatrium (Skarbilovich) and Papillatrium Richard (Trematoda: Lecithodendriidae). P. 394-401.
The paper deals with the systematic position of the species of the genera Acanthatrium, Mesothatrium and Papillatrium. A description of the new species. A. celebesi and A. copaccinii is given. The presence of the cirrus in A. tatrense is mentioned. The author gives his view on the insufficient basis for separating the genus Papillatrium, one species of which, P. atriopapillatum, is transferred to the genus Prosthodendrium and the other, P. inversum, to the genus Lecithodendrium. Keys to the species of the genera Acanthatrium and Mesothatrium are given.
in Russian
Some factors affecting the infection of insects with Neoaplectana carpocapsae agriotos (Nematoda: Steinernematidae). P. 402-407.
Some factors limiting the infection of some species and developmental phases of insects with nematodes Neoaplectana carpocapsae agriotos are described. Such factors as incapsulation and integumentary tissues density of insects refer to the host's protective mechanisms while the other, the drying rate of invasional larvae of nematodes, is determined by the environmental conditions of the medium. The best results in the infestation were obtained at the contact of nematodes with soil-inhabiting species and developmental phases of insects as it is in soil that the drying of nematodes proceeds slowly.
in Russian
Karyotypical peculiarities of some forms of stem eelworms of the collective species Ditylenchus dipsaci. P. 408-412.
Karoytypes of the stem eelworms of onion, wild strawberry, parslei, floxes and dandelion were studied. Different levels of genetic heterogeneity of these forms are shown. It was established that the modal number of chromosomes in the stem eelworms of onion, wild strawberry, floxes and parslei is n=12 while dominant chromosome numbers in the stem eelworm of dandelion are n=22 and n=24. This suggest that the stem eelworm of dandelion can be excluded from the collective species Ditylenchus dipsaci. A considerable intraspecific and intrapopulation polymorphism in the number of chromosomes found in the stem eelworms in of great interest for further studies of the evolution of these phytohelminths.
in Russian
Three new species of marine cercarians from the intertidal zone. P. 413-420.
Three new species of trematodes are described from littoral mollusks of the Japan and Okhotsk Seas as follows: Gercaria orientalis 5 sp. n., Cercaria pacifica 1 sp. n., Cercaria pacifica 2 sp. n. Analysis was run of the materials of the ecological morphology of larvae of trematodes from the intertidal zone with consideration for literary data.
in Russian
The infection of Unio pictorum and Anodonta piscinalis (Mollusca, Lamellibranchia) with parthenites of Bucephalus polymorphus Baer (Trematodes) and the effect of the parasites on the host's organism. P. 421-425.
The infection of Unio pictorum (L. 1758) and Anodonta piscinalis Nilsson, 1882 with parthenites of Bucephalus polymorphus Baer and the effect of the parasites on the host's organism were studied. A decrease in the concentration of polysaccharides, cardiolipins, acid mucopolysaccharides, DNA and partly RNA in the host's tissues was accompanied by the increase in the neutral fats content. Degenerative and necrotic processes in the tissues of infected organs took place that resulted in some cases in the parasitic castration of mollusks.
in Russian
Gamasid mites of rodents in tick-borne encephalitis nidi of Priamurje. P. 426-429.
In tick-borne encephalitis nidi of Priamurje gamasid mites are the most abundant groups of rodents' ectoparasites. They are active all year round and encountered mostly often in the nests of these animals. Virus KE was isolated from the mites collected on the hosts. On the basis of these and literary data о conclusion was made on the possible participation of gamasids in the maintenance of the virus turnover in micronidi, especially in a cold season when ixodid ticks are absent.
in Russian
On the swarming flight and mating in bloodsucking midges. P. 430-437.
The swarming flight was studied in 14 species of Culicoides. In 11 species, C. obsoletus, C. grisescens, C. fascipennis, С. pallidicornis, C. simulator, C. maritimus, C. odibilis, C. vexans, C. circumscriptus, C. manchuriensis and C. machardyi, the swarming flight of males proceeds irrespective of the presence of the prey. These are eurygamic species. In three species, C. pulicaris, C. subfascipennis and C. puncticollis, the swarming takes place as while the females attack the animals so at the other time. These are stenogamic species. The evolution of the process of sexes contacts in bloodsucking and non-bloodsuckmg midges ran in different ways. In some non-floobsuckers, especially non-feeding (aphagous) species, the mating without the swarming is the initial form. In bloodsucking midges (Culicoides) the swarming without prey is the initial form and so the evolution proceeded in the direction of developing the mating without swarming, i. e. on the prey.
in Russian
Age changes in biochemical indices of the IId and IIId stage larvae of reindeer warble flies. P. 438-446.
Dynamics of nutrients accumulation by larvae of reindeer warble flies depends on the developmental stage, physiological state and degree of maturity of parasites. Young larvae of each stage accumulate nutrients more intensively; the main reserve is created by larvae at the IIId stage. Glycogen is the main substratum which meets the organism requirements in energy during moulting.
in Russian
Flies, parasites of skin integument of domestic animals. P. 447-448.
15 species of bloodsucking and bloodlicking flies were found on domestic animals from various zones of the Samarkand district.
in Russian
The increase of DNA quantity in the nuclei of chicken caecal cells harbouring second generation schizonts of Eimeria tenella. P. 449-455.
Using the Feulgen cytophotometry the quantity of DNA in the nuclei of intact cells of chicken caeca was compared with that in cells infected with 2nd generation schizonts of Eimeria tenella. The nuclei of cells containing large through not yet segmented schizonts displayed the quantity of DNA almost 6 times as much as that in the non-infected cell nuclei. The data obtained suggest that the intracellular parasite may stimulate processes of transcription in the nuclei and, presumbly, related shifts in metabolic pattern of the host cell, which results eventually in the establishment of an environment favoring the parasite's growth and maturation.
in Russian
The use of amino acids from the host's cell for protein synthesis by Eimeria tenella. P. 456-459.
A study of the inclusion of C14-glycine into proteins of blind appendages of chicks infected with Eimeria tenella established a higher inclusion of the radioactive amino acid on the 2nd, 4th and 6th day after the infection. This seems to be associated with the glycine assimilation by coccidians for synthesis of their proteins in the course of intracellular stages of development. It was found that coccidians of E. tenella use aminoacids from the host's cell selectively. Of amino acids used by coccidians lisin was found to be most assimilable.
in Russian
Adipic acids content of lipids in membranes and oocysts of Eimeria tenella. P. 460-462.
Lipids of oocysts and oocyst membranes of Eimeria tenella include the higher adipic acids as follows: myristic, pentadecanoic, palmitic, palmitoleic, heptadecanoic, heptadecynoic, stearic, oleic, linoleic and arachic. The adipic acids per cent ratio is different in oocysts and oocyst membranes. The ratio of unsaturated and saturated adipic acids is 0.96 and 2.05 in oocyst membranes and oocysts, respectively (table 1).
in Russian
The effect of ultraviolet irradiation on the viability of spores of Plistophora schubergi and Nosema agrotidis. P. 463-468.
Study of the effect of various doses of ultraviolet rays on the suspension of spores of Plistophora schubergi and Nosema agrotidis was carried out by means of luminiscent microscopy and biological test (the ability of spores to infect caterpillars of the turnip moth). The complete death of spores was observed in no case but the increasing dose of ultraviolet irradiation caused the reduction in the lethal ability of spores. Spores of P. schubergi proved to be less resistant to ultraviolet irradiation than those of N. agrotidis.
in Russian
Obituary. P. 469-471.
Summary is absent.
in Russian