[Skin leiomyomas].
Three patients with multiple leiomyomas of the skin were treated with electro-excision techniques. The tumor was hereditary in one of these patients.
Biopsy↗
Biomedical subjects
T I Zharikova
Publications and source records attributed to T I Zharikova.
[The adaptive reactions of the gill ectoparasites of the bream (Abramis brama) and of the white bream (Blicca bjoerkna) to exposure to an anthropogenic factor in the Ivan'kovo Reservoir].
Adaptive responses of some gill ectoparasites of the common bream Abramus brama and the white bream Blicca bjoerkna have been studied in five zones of the Ivan'kovo Reservoir: in the region of favorable ecological conditions, in two eutrophic zones and in two areas under the toxic loading. It is found out, that at the response to the pollution the infestation of fishes with most parasite species decreases. The replacement of dominant species is also can be considered as the adaptive response of parasites. It is recorded, that each examined zone with a specific ecological conditions obtains a specific parasite species grouping with a certain composition and abundance of parasite species. The monogeneans of the genus Dactylogyrus express their adaptation to increased temperature by decrease of chitinoid structure size in attachment disc, while the copepods Ergasilus sieboldi react to this factor by faster maturation of egg sacks.
Adaptation, Physiological↗
[Invasion of fish with leeches (Fam. Piscicolidae) in reservoirs of the Volga river].
It is shown for the first time that during 50 years of the Rybinsk reservoir's existence the abundance of parasite leeches (Piscicolidae) has increased, and the species composition has become richer. In 70 the leech Caspiobdella fadejewi (Epstein) was registered here as a mass species. This species became a real competitor to Piscicola geometra (L.) inhabiting the Volga river in all times. In early '90s the leech Acipenserobdella volgensis (Zykoff) appeared in the Rybinsk reservoir. Till 1987 this species was not found to the north from the Kuibyschev reservoir. An increase in number of fish leeches and an extension of their specific composition occurred not only in the Rybinsk reservoir but in the other reservoirs of the Volga cascade as well.
Animals↗
[Ectoparasite infection of some fish species in lake Pleshcheev].
Ectoparasites have been investigated on gills of the ruff, perch, white bream, roach, bream, ide, and European cisco from the Pleshcheevo lake. 13 parasite species were found: Dactylogyrus falcatus, D. distinguendus, D. cornoides, D. cornu, D. sphyrna, D. robustus, D. amphibothrium, Ancyrocephalus paradoxus, Argulus foliaceus, Ergasilus sieboldi, Achtheres percarum, Ancyrocephalus percae, and Rhipidocotyle companula. A reliable negative correlation between the number of monogeneans An. paradoxus and the copepods Ac. percarum on the perch. D. falcatus, the specific monogenean of the bream, was found on the roach. The comparison of the obtained data with those of 1939 has shown the decrease of oxyphilic copepods E. seiboldi, that prove the increasing eutrophication.
Animals↗