Hydrogeology of the northern Sea of Okhotsk coast

Glotov, V. E.; Glotova, L. P.

doi:10.1134/s1819714008060031

Cited by 5 publications

(3 citation statements)

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“…The conductivity of water masses is determined by both the type of underlying rock and the temperature due to microclimate and flood phenomena [Brunke, 2003]. In the Kolyma basin with a pronounced relief of the valleys, floods are rare compared to the flat coastal areas of the Yana and Ola basins [Glotov, Glotova, 2008;Korotaev, 2010]. These, albeit small, differences in the hydrological regime of reservoirs undoubtedly affect the composition of the microcrustacean fauna, for which flooding is both an extreme phenomenon and a way of settling along reservoirs adjacent to the riverbed [Kiselev, 1980].…”

Section: B Ecological Factors and Assem-blagesmentioning

confidence: 99%

The species structure, biogeographical status, and the relation to the Beringian fauna of microcrustaceans (Cladocera, Copepoda) of the Magadan Area (Far East, Russia)

Novichkova

Chertoprud

2022

Arthsel

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Section: B Ecological Factors and Assem-blagesmentioning

confidence: 99%

The species structure, biogeographical status, and the relation to the Beringian fauna of microcrustaceans (Cladocera, Copepoda) of the Magadan Area (Far East, Russia)

Novichkova

Chertoprud

2022

Arthsel

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“…The importance of this infection in intensifying dairy and beef farming is increasing. The most economically significant consequences of the diseases are the reproductive disorders and pathologies of the respiratory tract; therefore, seronegative heifers of the mating age and calves up to 6 months of age are more susceptible to infection [7][8][9]. Permanent adverse epidemiological situation on farms is maintained through the presence of persistently infected (PI) animals, which become a permanent endogenous source of the pathogen.…”

Section: Introductionmentioning

confidence: 99%

Genetic Polymorphism of the Bovine Viral Diarrhea Viruses in Big Dairy Farms in Siberia

Koteneva¹,

Nefedchenko²,

Glotova³

et al. 2018

s-h. biol.

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A b s t r a c tBovine viral diarrhea is a widespread disease in the Russian Federation and causes significant economic damage to dairy cattle, especially under intensive commercial farming. The seropositivity of livestock in various Russian regions reaches 65-100 %. The disease is caused by two different virus species, BVDV-1 and BVDV-2, of which the latter is considered more virulent. The persistently infected (PI) animals which are a constant endogenous source of the virus in the herd play a major role in maintaining the stationary trouble of the farms. Short-term sources of the pathogen are transitively infected (TI) animals in which disease proceeds in acute form. Genetic structure of viruses circulating in local livestock populations gives necessary information about the evolution, geography and pathways of the pathogen. However, studies on the genetic polymorphism of viruses in Russia are not enough. This paper is the first to report on a phylogenetic analysis of two types of viral diarrhea virus, isolated from animals of foreign and domestic origin with different clinical manifestations of the disease. These data show the prevalence of BVDV-1b in PI and TI animals, as well as BVDV-2b and BVDV-2c circulation among Siberian dairy complexes (note, BVDV-2b and BVDV-2c in animals of foreign and domestic origin are detected in Russia for the first time). Phylogenetic analysis of viruses circulating among PI and TI of highly productive dairy cattle was based on a comparison of conserved region of viral genome (5´-UTR) using reverse transcriptase PCR (RT-PCR) method. Studies were conducted in five regions of Western and Eastern Siberia: Tyumen, Novosibirsk, Irkutsk regions, the Krasnoyarsk Territory and Northern Kazakhstan on big dairy farms with a population of 800 or more milking cows with an average annual productivity of 7,000-10,000 liters, where at the time of the research vaccination was not carried out or inactivated vaccines were used. The imported livestock was kept mainly in the Tyumen region and the Republic of Kazakhstan. Biomaterial (blood, serum, nasal discharge, lymphoid organs, lungs, vaginal discharges) was collected from clinically healthy persistently infected animals, transitively infected animals with reproductive disorders and respiratory syndrome, as well as aborted fetuses. A total of 479 samples were examined. According to our findings, two BVDV species circulate among the PI and TI animals on the big dairy farms. The phylogenetic analysis reveals seven subtypes of BVDV-1, i.e. 1a (5 %), 1b (35 %), 1c (5 %), 1d (10 %), 1f (20 %), 1i (5 %), 1p (5 %) and two subtypes of BVDV-2, i.e. 2b (10 %) and 2c (5 %). Taking into account the fact that the strategy of livestock breeding is changing in Russia, the number of dairy mega farms" is increasing, which receive animals with different infectious status from many sources. Thence, the study of the genetic polymorphism of the virus is topical. Comparison of data on the origin of animals with the results of phylogenetic analyses can help in determina...

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“…Климат здесь резко континентальный с морозной зимой (средняя температура воздуха в январе -38,2 °С) и умеренно теплым летом (средняя температура в июле 13,3 °С) [8,5]. Отмечается сплошное распространение многолетней мерзлоты, прерываемое таликами [1,12].…”

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Продолжительность Промерзания Рек Верхней Колымы В условиях Климатических Изменений

Ушаков

2024

Society. Environment. Development

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Цель работы: выявить климатические изменения в продолжительности промерзания рек Верхней Колымы. Методами исследования явились анализ временных рядов на тренд по критерию Стьюдента и по показателю Херста, низкочастотная фильтрация рядов скользящим средним с окном 30 лет. По критерию Стьюдента исходные ряды продолжительности промерзания неоднородны по среднему, имеют тренд на повышение, что подтверждается критерием Херста. За последние десятилетия средняя продолжительность промерзания, рассчитанная за 1981–2020 гг., сократилась на 10–13 дней. Это произошло за счет отодвигания дат начала промерзания в сторону поздних, которое, в свою очередь, вызвано потеплением климата. Это отчетливо видно на графиках скользящих 30-летних средних. Получено уравнение связи 30-летних средних длительности промерзания и среднегодовой температуры воздуха. Рассчитаны нормы длительности промерзания к 2050 г. и построены кривые обеспеченности при различных вариантах потепления климата.

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Hydrogeology of the northern Sea of Okhotsk coast

Cited by 5 publications

References 0 publications

The species structure, biogeographical status, and the relation to the Beringian fauna of microcrustaceans (Cladocera, Copepoda) of the Magadan Area (Far East, Russia)

The species structure, biogeographical status, and the relation to the Beringian fauna of microcrustaceans (Cladocera, Copepoda) of the Magadan Area (Far East, Russia)

Genetic Polymorphism of the Bovine Viral Diarrhea Viruses in Big Dairy Farms in Siberia

Продолжительность Промерзания Рек Верхней Колымы В условиях Климатических Изменений

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Hydrogeology of the northern Sea of Okhotsk coast

Cited by 5 publications

References 0 publications

The species structure, biogeographical status, and the relation to the Beringian fauna of microcrustaceans (Cladocera, Copepoda) of the Magadan Area (Far East, Russia)

The species structure, biogeographical status, and the relation to the Beringian fauna of microcrustaceans (Cladocera, Copepoda) of the Magadan Area (Far East, Russia)

Genetic Polymorphism of the Bovine Viral Diarrhea Viruses in Big Dairy Farms in Siberia

Продолжительность Промерзания Рек Верхней Колымы В условиях Климатических Изменений

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Продолжительность Промерзания Рек Верхней Колымы В условиях Климатических Изменений