Description of Echinobothrium typus van Beneden, 1849 (Platyhelminthes: Diphyllidea) from Raja clavata Linnaeus, 1758 (Pisces: Rajidae) in the Black Sea

Mature specimens of the cestode Echinobothrium typus van Beneden, 1849 from the thornback ray Raja clavata Linnaeus, 1758 that inhabit the Black Sea are found and described in detail for the first time. New details of the scolex armature and reproductive system structures of E. typus are revealed. Infection indices of this cestode in the thornback rays are analyzed. It is shown that the occurrence of E. typus in the definitive host Raja clavata depends not only on the presence and the population density of the intermediate host, presumably, amphipods Perioculodes longimanus Bate et Westwood, 1868, but also on the age related changes in the food spectrum of the thornback rays

Mystics on the Internet space: to determine the concept

В статье рассказывается о феномене современной культуры - мистике в Интернет-пространстве. Внимание уделяется рассмотрению понятия мистики, обозначение еѐ разновидностей и направлений.The article describes the phenomenon of contemporary culture – mysticism in the Internet space. Attention is paid to the concept of mysticism, the designation of its species and areas

High-resolultion reconstruction of Lena River discharge during the Late Holocene inferred from microalgae assemblages

On the basis of a detailed study of the diatom and aquatic palynomorph assemblages and a detailed radiocarbon chronology of sediment cores obtained from the south-eastern inner Laptev Sea shelf adjacent to the Lena Delta the spatial and temporal variability in the Lena River discharge during the last 6 cal. ka were reconstructed. It was shown that in the area adjacent to the Lena Delta variations in surface water salinities, reconstructed using freshwater diatoms as a proxy, were mainly caused by changes in the volume of the Lena River runoff through the major riverine channels Trofimovskaya, Bykovskaya and Tumatskaya. Several paleohydrological phases are recognized: (i) establishment of modern-like conditions within the eastern Lena River Valley occurred from 6-4.2 cal. ka; (ii) Lena River outflow increased in north-eastward direction via the Trofimovskaya or Bykovskaya channels from 4.2-2.7 cal. ka, coeval with a reduction of runoff toward the north via the Tumatskaya Channel; (iii) generally stable hydrological conditions northward of the Tumatskaya Channel and variations in riverine discharge north-eastward of the Trofimovskaya and Bykovskaya channels prevail since 2.7 cal. ka. Using indicator species of dinocysts as principle marine proxy, an influence of Atlantic water to the southeast inner Laptev Sea shelf could be inferred, possibly along the Eastern Lena paleovalley, brought into this area by winddriven reversed bottom currents. Zusammenfassung: Untersuchungen von Diatomeen- und aquatischen Palynomorphen-Vergesellschaftungen wurden an Radiokohlenstoff datierten Sedimentkernen aus der inneren südöstlichen Laptevsee nahe des Lenadeltas durchgeführt. Anhand dieser Daten wurde die zeitliche und räumliche Veränderlichkeit des Flusswasserausstromes der Lena für die letzten 6 ka (Kalenderjahre) rekonstruiert. Zeitliche Veränderungen in den Häufigkeiten von Süßwasserdiatomeen sind begründet durch Wechsel in der Menge des Lenaausflusses durch die drei großen Haupkanäle im Delta: Trofimovskaja, Bykovskja, sowie Tumatskaja. Darauf basierend konnten prinzipiell drei große paläohydrologische Phasen unterschieden werden: (1) heutigen Verhältnissen vergleichbare Bedingungen wurden östlich des Lenadeltas zwischen 6 und 4.2 ka etabliert; (2) Erhöhung des Flusswasseraustrags in nordöstliche Richtung über die Kanäle Trofimovskaja und/oder Bykovskaja zwischen 4.2 und 2.7 ka bei gleichzeitiger Reduzierung Richtung Norden via Tumatskaja; (3) Ausbildung relativ stabiler Bedingungen nördlich des Deltas sowie Auftreten wechselhafter Flusswasserausträgen in östliche Richtung nach 2.7 ka. Das Auftreten von marinen Dinocysten in den Sedimenkernen belegt den Einfluss von Wassermassen mit vermutlich atlantischem Ursprung. Es ist zu vermuten, dass diese durch windgetriebene Bodenströmungen entlang der alten versunkenen Flusstäler auf den östlichen inneren Schelf verfrachtet werden

Hydrological changes in the White Sea during the historical period inferred from analysis of dinocysts

According to available historical evidence, colonization of the White Sea region began in the 9th–8th centuries B.C. [2]. This unique region with ancient residence sites experiences progressively increasing anthropogenic load against the background of natural climatic changes. The intense economic development of the region requires complex ecological and paleogeographic studies aimed at detailed reconstruction of past sedimentation settings. The analysis of dinocysts, which makes it possible to reconstruct various parameters of water masses washing the Arctic shelf, has become a promising method in paleohydrological studies, widely used in recent years [10, 11]. Dinoflagellates, which represent one of the main phytoplankton groups in the Arctic Seas, the White Sea included, form cysts with biopolymer envelopes, which are preserved in sediments. Thus, information on glacial–hydrological conditions is recorded in marine sediments. In the White Sea, this method was first used for the study of bottom sediments only in 2003 [3, 15]. In this communication, we present the first results obtained during the thorough study of dinocysts in bottom sediment cores from the White Sea, which cover the last 250 years. The study of this microfossil group made it possible to reconstruct in detail changes in glacial–hydrological settings in the sea and reveal their relations with known climatic–hydrological events that occurred in neighboring regions during the historical period

Dinoflagellate cysts in the surface sediments of the White Sea

Dinoflagellate cysts were studied in 42 samples from the surface sediments of the White Sea. The total concentration of dinocysts varies from single cysts to 25 000 cyst/g of dry sediments, which reflects the biological productivity in the White Sea waters and the regional particular features of the sedimentation processes. The highest concentrations are observed in silts; they are related to the regions of propagation of the highly productive Barents Sea waters in the White Sea. Generally, the spatial distribution of dinocysts species in the surface sediments corresponds to the distribution of the major types of water masses in the White Sea. The cysts of the relatively warm-water species (Operculodinium centrocarpum, Spiniferites sp.) of North Atlantic origin that dominate in the sediments indicate an intensive intrusion of the Barents Sea water masses to the White Sea along with hydrological dwelling conditions in the White Sea favorable for the development of these species during their vegetation period. The cold-water dinocyst assemblage (Islandinium minutum, Polykrikos sp.) is rather strictly confined to the inner parts of shallow-water bays, firstly, those adjacent to the Onega and Severnaya Dvina river mouths

Stereotypes of feminism in Russia

In this article the author considers the main problems of feminism development in modern Russia, and widespread stereotypes about this movement and its representatives.В статье рассматриваются основные проблемы развития феминизма в современной России, а также распространенные стереотипы об этом движении и его представителях

Reproductive toxicity of carbon nanostructured material - a promising carrier of drugs in laboratory mice

At the same time, the purpose of this study was to evaluate the reaction of the reproductive system on the carbon nanostructured material "Taunit (multi-walled carbon nanotubes), that was injected to laboratory miceyesBelgorod State Universit

Modeling of Socio-Economic Development of the Country on the Basis of Pulse Processes Моделирование социально-экономического развития регионов страны на основе импульсных процессов

The article deals with the nature and characteristics of simulation for analyzing and forecasting the socio-economic development of the country. It is shown that the basis of such simulations are diagrams causality - cognitive map and study the problem on the basis of a cognitive map is through the distribution of the pulsed process. It was reviewed and analyzed a number of modern simulation (cognitive) models of regional development proposed in the scientific literature that demonstrate the use of this tool as the modeling of the dynamics of macroeconomic indicators and indicators of local economic and social development of the region. The basic advantages and disadvantages of the use of cognitive models in the modeling of macroeconomic and regional dynamics were defined.В статье рассматриваются сущность и особенности применения имитационного моделирования при анализе и прогнозировании социально-экономического развития регионов страны. Показано, что в основе такого моделирования лежат диаграммы причинно-следственных связей – когнитивные карты, и исследование проблемы на основе когнитивной карты происходит путем распространения импульсного процесса. Рассмотрен и проанализирован ряд современных имитационных (когнитивных) моделей регионального развития, предложенных в научной литературе, которые демонстрируют использование данного инструментария как при моделировании показателей макроэкономической динамики, так и локальных показателей социально-экономического развития региона. Выделены основные достоинства и недостатки применения когнитивных моделей в моделировании макроэкономического развития и региональной динамики

Methodological and analytical provision of region monitoring

The article reflects methodological and applied aspects of the quality and completeness of information provided to the monitoring taking into account the level of spatial aggregation. The authors suggest an algorithm on forming informational blocks of monitoring on the region level which allows to implement the functions of the given analytical tool. Furthermore, the article provides the reasons for integrating information within the united methodological and legal area of Russian public statistics in order to form the representative database for regional monitoring and analysis.peer-reviewe

The influence of agro-climatic conditions on the yield of sunflower in the Belgorod region

The research showed that natural conditions and agro-climatic resources of the Belgorod region potentially are rather favorable for the cultivation of sun-flower. However, due to considerable variability of the agro-meteorological conditions in time and space, the sunflower yield will experience substantial var-iability by years and by the administrative districts of the regio