Knowledge about the distribution of living organisms on Earth is very important for many areas of biological science and understanding of the surrounding world. However, much of the existing distributional data are scattered throughout a multitude of sources, such as taxonomic publications, checklists and natural history collections and often, bringing them together is difficult. A very successful attempt to solve this problem is the GBIF project, which allows a huge number of researchers to publish data in one place in a single standard. Our dataset represents a significant addition to the occurrences of amphibians in the Volga, Don riverine basins and adjacent territories.
The dataset contains up-to-date information on amphibian occurrences in the Volga river basin and adjacent territories, located for the most part on the Russian plain of European Russia. The dataset is based on our own studies that were conducted in the years 1996-2020. The dataset consists of 5,030 incident records, all linked to geographical coordinates. A total of 13 amphibian species belonging to nine genera and six families have been registered within the studied territory, although the distribution of amphibian species in this region of Russia has not yet been fully studied. This is especially relevant with the spread of cryptic species that can only be identified using molecular genetic research methods.
The main purpose of publishing a database is to make our data available in the global biodiversity system to a wide range of users. The data can be used by researchers, as well as helping the authorities to manage their territory more efficiently.
All occurrences are published in GBIF for the first time. Most of the data are stored in field diaries and we would like to make it available to everyone by adding it in the global biodiversity database (GBIF).
Population screening of the Arctic variant, which has arisen due to the G > A mutation at locus rs80356779 in the CPT1A gene, has been performed for the first time among indigenous peoples of Siberia (Chukchi, Koryaks, Evens, Evenks, Yakuts, Buryats and Altaians) and East Asia (Koreans). It is assumed that CPT1A Arctic variant originated from Eskimo ancestors, probably as a result of adaptation to a high-fat diet and/or to the extremely cold environment. It is also known that the homozygous Arctic variant is associated with hypoketotic hypoglycemia attributable to CPT1A deficiency and high infant mortality and occurs at high frequency in American Eskimo. On the other hand, the association of CPT1A Arctic variant with increased levels of HDL-cholesterol and apolipoprotein A1 in blood plasma suggests that this mutation might have a cardioprotective role. In the present study, a high frequency of CPT1A Arctic variant has been found in coastal populations of Northeast Asia -in Koryaks (66 %), Chukchi (56 %) and Evens (30 %), and singularly (at a frequency of 1 %) in Evenks of Central Siberia. Five polymorphic loci relevant to the haplotypic structure of CPT1A gene (rs2278908, rs2278907, rs2924699, rs7112615 and rs2229738) were revealed by high-throughput DNA sequencing in addition to locus rs80356779 studied here. It was found that the Arctic variant haplotype has arisen only once on the basis of the haplotype, which is widespread in modern populations of Eurasia. We assume that the expansion of Eskimo culture of the sea mammal hunting as well as Eskimo assimilation by Chukchi and Koryaks have contributed to the spread of the CPT1A Arctic variant across the populations of indigenous peoples of Northeast Asia.
ИЗУЧЕНИЕ ТЕРМОРЕГУЛИРУЮЩЕГО ПОВЕДЕНИЯ РЕПТИЛИЙ МЕТОДОМ ИМПЛАНТАЦИИ РЕГИСТРАТОРОВ ТЕМПЕРАТУРЫМетод постоянной регистрации температуры тела может считаться наиболее объектив-ным показателем всех форм термостабилизируещего поведения рептилий. В качестве объекта были выбраны два водяных и два обыкновенных ужа, все примерно одного размера, и пять обыкновенных гадюк, выпущенных на волю в места их поимки. В каждой змее находился один регистратор iBDL типа таблетка, примерно посередине спины рабочей поверхностью к телу. Библиогр. 7 назв. Ил. 5. Method of permanent registration of the body temperature can be regarded as the most objective measure of all forms of termostabilizing behavior of reptiles. As the objects for the study we selected two grass (Natrix natrix) and two dice (Natrix tesselata) snakes all of about the same size and fi ve European adders (Pelias berus) released in the places of their capture. Each snake had one receptionist iBDL type tablet, approximately in the middle of the snake's back with the working surface facing to its body. Refs 7. Figs 5.
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