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1.
Dokl Biol Sci ; 2024 Jul 01.
Artigo em Inglês | MEDLINE | ID: mdl-38955884

RESUMO

The Abrau sprat (tyulka or sardelka) Clupeonella abrau (Maliatsky, 1930) is an endemic fish of the Lake Abrau (Krasnodar Krai, Russia). The full C. abrau mitochondrial genome (16 650 bp) showed a gene arrangement conserved in Clupeidae and 98.8% similarity with the mitochondrial genome of the related species Black and Caspian Sea sprat C. cultriventris from the Black Sea. The COX1 gene sequence was additionally studied in a museum specimen collected in the Lake Abrau in 1938. Variability in modern Abrau sprat COX1 gene locus was estimated at approximately 0.15%, the difference between C. abrau and C. cultriventris was 1.2%, and the difference between the museum and modern C. abrau specimens from the Lake Abrau was 0.92%. The study confirmed that the Abrau sprat is present in the fish community and is capable of reproducing in the lake. Various scenarios were proposed to explain colonization of the Lake Abrau by C. abrau.

2.
Dokl Biol Sci ; 512(1): 321-325, 2023 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-38087021

RESUMO

Data reported from Northern Canada were until recently the only available data on the genetic characteristics of the oribatid mite Ameronothrus nigrofemoratus, which has a circumpolar distribution on the coasts of Arctic seas. A partial cytochrome oxidase I gene (COI) mtDNA sequence was examined in mites morphologically assigned to this species from the Kolguev Island. Two highly divergent phylogenetic lineages of A. nigrofemoratus (7% divergence) were revealed, neither of which was found on the Canadian coast. Four COI amino acid substitutions distinguished one of the lineages from North American A. nigrofemoratus, corresponding to the degree of difference between A. nigrofemoratus and its sister species A. lineatus.


Assuntos
Ácaros , Animais , Ácaros/genética , Filogenia , Canadá , DNA Mitocondrial/genética , Regiões Árticas
3.
Biochemistry (Mosc) ; 84(1): 56-61, 2019 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-30927526

RESUMO

The ultrastructure of mitochondria in the flattened circomyarian fibers of the horsehair worm Gordionus alpestris (Nemathelminthes) was examined. In contrast to the previously published data, we showed these mitochondria to be giant elongated organelles that densely fill the central cytoplasmic space of the ribbon-like muscle fibers. No fundamental differences were found in the ultrastructure of the muscle tissue mitochondria in actively moving free-living and parasitic G. alpestris worms. The functional significance of the observed ultrastructural organization of mitochondria is discussed in connection with the necessity for an extended mitochondrial membrane system for a uniform supply of active muscle tissue with energy.


Assuntos
Helmintos/anatomia & histologia , Mitocôndrias/ultraestrutura , Músculo Estriado/ultraestrutura , Animais , Metabolismo Energético , Helmintos/citologia , Mitocôndrias Musculares , Membranas Mitocondriais
4.
Parazitologiia ; 50(3): 185-96, 2016.
Artigo em Inglês | MEDLINE | ID: mdl-29115109

RESUMO

Acanthocephalans Prosthenorchis cf. elegans were found in primates in the Moscow Zoo. The larvae of these parasites (cistacanths) were found in cockroaches Blattella germanica that had been captured near aviaries of infected animals. Descriptions and drawings of adult parasites and their larvae are given. Analysis of Prosthenorchis cf. elegans genes ITS 1 rDNA and CO 1 mtDNA shows phylogenetic relations of these parasites with several representatives of the class Archiacanthocephala. The obtained molecular data, however, do not support the monophyly of the family Oligacanthorhynchidae and the order Oligacanthorhynchida.


Assuntos
Acantocéfalos/anatomia & histologia , Animais de Zoológico/parasitologia , Blattellidae/parasitologia , Larva/anatomia & histologia , Filogenia , Primatas/parasitologia , Acantocéfalos/classificação , Acantocéfalos/genética , Acantocéfalos/crescimento & desenvolvimento , Animais , DNA Intergênico/genética , DNA Mitocondrial/genética , Feminino , Helmintíase/mortalidade , Helmintíase/parasitologia , Larva/genética , Larva/crescimento & desenvolvimento , Masculino , Moscou , Doenças dos Primatas/mortalidade , Doenças dos Primatas/parasitologia
5.
Parazitologiia ; 49(1): 42-8, 2015.
Artigo em Russo | MEDLINE | ID: mdl-26016333

RESUMO

The cuticular structure of the horsehair worm Gordionus alpestris (Villot, 1885) was studied under scanning and transmission electron microscopes. Adult worms were collected in the Syuk River near Nickel' Village in the Republic of Adygea (Russia) in June 2013. In the sampling area, the G. alpestris juveniles parasitize diplopods Pachyiulus krivolutskyi Golovatch, 1977. Similarities with other Nematomorpha species with the known cuticle ultrastucture are discussed.


Assuntos
Helmintos/classificação , Helmintos/ultraestrutura , Rios/parasitologia , Animais , Federação Russa
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