Results of a secular study of some features of the biology of the muksun population Coregonus muksun of the Ob-Irtysh basin

2021 ◽  
pp. 8-27
Author(s):  
Boris Yu. Kassal
Keyword(s):  
Anthropogenic Factors ◽  
Complete Disappearance ◽  
Rational Use ◽  
Ob River ◽  
Systemic Analysis ◽  
Irtysh Basin

Muksun spawned in the Ob River and its tributaries and overwintered in the river and in the Ob Bay, making various migrations. Under the influence of anthropogenic factors, there was a decrease in the number, to the threat of almost complete disappearance of the population. A retrospective systemic analysis of the peculiarities of the existence of the muksun population should become the basis for a strategy for its restoration and rational use.

scholarly journals Physical-mathematical modeling of multiyear dynamics of water-balance and snow-reserve components in Ob-Irtysh river basin

2019 ◽  
Vol 46 (4) ◽  
pp. 347-358
Author(s):  
E. M. Gusev ◽  
O. N. Nasonova ◽  
E. A. Shkurko ◽  
L. Ya. Dzhogan ◽  
G. V. Ayzel
Keyword(s):  
River Basin ◽  
River Flow ◽  
West Siberia ◽  
Information Support ◽  
Ob River ◽  
The North ◽  
Calculation Technique ◽  
Swap Model ◽  
Irtysh Basin ◽  
Geological Substrate

The possibility of use of the previously developed calculation technique of the North Rivers flow hydraulic records for the Ob River, the largest river in Russia by basin area, flowing under severe conditions in West Siberia was examined. The calculation technique is based on the model of heat and moisture exchange of the geological substrate with the Earth’s atmosphere, the Soil-Water–Atmosphere–Plants (SWAP) model, in conjunction with information support based on global databases of geological-substrate parameters and information obtained from observational data collected by weather stations within the Ob River basin. Uncertainty of the Ob River flow was assessed. Additionally, the ability of the SWAP model to reproduce multiyear dynamics from average values of snow reserves in the Ob-Irtysh basin was examined.

scholarly journals Land Use Changes and Their Driving Forces in a Debris Flow Active Area of Gansu Province, China

2018 ◽  
Vol 10 (8) ◽  
pp. 2759 ◽  
Author(s):  
Songtang He ◽  
Daojie Wang ◽  
Yong Li ◽  
Peng Zhao
Keyword(s):  
Land Use ◽  
Land Use Change ◽  
Debris Flow ◽  
Driving Forces ◽  
Land Use Changes ◽  
Gansu Province ◽  
Anthropogenic Factors ◽  
Flow Area ◽  
Construction Land ◽  
Systemic Analysis

Land use change is extremely sensitive to natural factors and human influence in active debris flow. It is therefore necessary to determine the factors that influence land use change. This paper took Wudu District, Gansu Province, China as a study area, and a systemic analysis of the transformational extent and rate of debris flow waste-shoal land (DFWSL) was carried out from 2005 to 2015. The results show that from 2005 to 2015, cultivated land resources transformed to other types of land; cultivated lands mainly transformed to grassland from 2005 to 2010 and construction land from 2010 to 2015. Moreover, the growth rate of construction land from 2005 to 2010 was only 0.11%, but increased to 6.87% between 2010 and 2015. The latter is more than 60 times the former. This increase was brought about by natural disasters (debris flow, earthquakes, and landslides) and anthropogenic factors (national policies or strategies), which acted as driving forces in debris flow area. The former determines the initial use type of the DFWSL while the latter only affects the direction of land use and transformation.

scholarly journals Rational use of floodplain ecosystems of the North

2021 ◽  
Vol 291 ◽  
pp. 02026
Author(s):  
Aliya Kushanova ◽  
Elena Korkina ◽  
Sergey Sokolov
Keyword(s):  
Information System ◽  
Geographic Information System ◽  
Spatial Analysis ◽  
Economic Efficiency ◽  
Satellite Image ◽  
Geographic Information ◽  
Rational Use ◽  
Ob River ◽  
The North ◽  
Floodplain Ecosystems

The purpose of the study is the spatial analysis of the factors of floodplain ecosystems and the calculation of rational use, through the calculation of technical and economic indicators and the calculation of the economic efficiency of haymaking. The assessment of the economic efficiency of the forage base was obtained based on the study of the grass stand and productivity of hayfields in five key areas of the Ob River floodplain, the study of soil properties, their qualitative characteristics necessary for understanding the soil fertility of floodplain ecosystems, on which land productivity depends. The spatial analysis of the rational use of the floodplain ecosystems of the Ob River was made in a semi-automatic way by decoding the Bing satellite image (the SAS Planet mapping and navigation program) in the Semi-Automatic Classification Plugin module in the QGIS geographic information system, the cartographic material was edited in the MapInfo Professional geographic information system.

scholarly journals History and status of sturgeon stock (Acipenseridae) in the Caspian pool

Vestnik MGTU ◽  
2020 ◽  
Vol 23 (2) ◽  
pp. 105-114
Author(s):  
A. D. Vlasenko ◽  
T. I. Bulgakova ◽  
I. N. Lepilina ◽  
I. V. Konopleva ◽  
I. A. Safaraliev
Keyword(s):  
River Flow ◽  
Agricultural Runoff ◽  
Anthropogenic Factors ◽  
Volga River ◽  
Rational Use ◽  
Ecological Adaptability ◽  
The North ◽  
Current State ◽  
Natural Reproduction

Analysis of materials from long-term studies characterizing the current state of sturgeon stocks in the Volga-Caspian fisheries basin, and the dynamics of commercial catches of beluga, sturgeon and stellate sturgeon in the XX - XXI centuries indicates that the Northern Caspian occupies the leading value in catch volumes, where more than 70 % of sturgeon fish are annually harvested. In the first half of the twentieth century sturgeon stocks were determined by the scale of natural reproduction in rivers and fishing volumes; in the second half, natural and anthropogenic factors began to intensively influence the formation of sturgeon stocks. The development of hydraulic construction on rivers, an increase in the withdrawal of freshwater runoff, a decrease in sea level to -29.0 mBS, pollution by industrial and agricultural runoff have necessitated the development of a set of measures for the reproduction, conservation and rational use of the Caspian’s aquatic biological resources. As a result of the studies, the response of the sturgeons to the changed conditions of reproduction has been determined in order to restore and increase their commercial stocks; high ecological adaptability of sturgeons to various living conditions within their range, their exceptional plasticity and pronounced intraspecific differentiation have been established. These indicators point to the possibility of creating conditions that meet the requirements for water quality for the life of sturgeons during migration and reproduction. In the course of the analysis of the obtained data, the influence of regulation of the Volga River flow on the efficiency of natural reproduction of sturgeons has been evaluated; the role of industrial sturgeon breeding in sturgeon stock formation has been shown; the abundance of juveniles in the North Caspian and adult individuals on feeding pastures of the sea has been estimated; trends in the number of sturgeon producers migrating in the Volga to spawning sites have been identified; the prospects for the restoration and rational use of sturgeons in the Volga-Caspian basin have been determined.

scholarly journals Analysis of state of biotic resources of Vereshchytsia River basin

2014 ◽  
pp. 88-97
Author(s):  
Volodymyr Grekh ◽  
Oksana Kormylo ◽  
Semen Kukurudza
Keyword(s):  
Key Words ◽  
River Basin ◽  
Drainage Basin ◽  
Anthropogenic Factors ◽  
Rational Use ◽  
Forage Base ◽  
The Impact ◽  
Hunting And Fishing ◽  
Biotic Resources

The resources of plants (forest and meadow-marsh), animals (hunting and fishing) on example of the drainage basin of river Vereshchytsia as clearly defined the terrestrial-waterу spatio-functional geosystem are analysed. Also the role of phyto- and zooplankton in the improving of the forage base fisheries is analysed. The relationships and the interdependences of abiotic and biotic components of the environment and the impact of the anthropogenic factors on them are considered. Key words: biotic resources, drainage basin, river basin approach, rational use, reproduction, protection of biota.

scholarly journals INVASION OF FISH BY LARVAE OF THE FAMILY DIPHYLLOBOTHRIIDAE IN THE KHANTY-MANSI AUTONOMOUS OKRUG – YUGRA

2021 ◽  
pp. 367-373
Author(s):  
Moskina ◽  
Shafranova ◽  
Kozlova ◽  
Guzeeva
Keyword(s):  
Perca Fluviatilis ◽  
Gymnocephalus Cernuus ◽  
Ob River ◽  
Muscle Tissues ◽  
Perch Perca Fluviatilis ◽  
Study Results ◽  
The Family ◽  
Irtysh Basin ◽  
High Level ◽  
Khanty Mansi Autonomous

Two epidemiologically significant species of the tapeworm (D. latum и D. dendriticum) circulate in of the Ob-Irtysh basin within the Khanty-Mansi Autonomous Okrug. They have an unequal effect on the human body. The purpose of the science work is to determine the invasion of fish by larvae of tapeworms D.latum and D.dendriticum (Perch Perca fluviatilis, Ruff Gymnocephalus cernuus, Pike Esox lucius, Syrok Coregonus peled, Muksun Coregonus muksun, Nelma Stenodus leucichthys nelma) from waterbodies of the Ob River and its tributaries from 2013 to 2019 year. The study aim is to identify the main factors of transmission of the invasion (diphyllobothriasis) to population. The fish for parasitological research and species identification was caught in the Ob River and its tributary, the Vakh River, as well as Torm-Emtor Lake. The studies were carried out in the parasitological laboratory of the Center for Hygiene and Epidemiology in the Khanty-Mansi Autonomous Okrug – Yugra, Nizhnevartovsk, the Nizhnevartovsk District, in Megione and Raduzhny by the method of incomplete helminthological study of fish. The study results found in general a very high level of plerocercoid invasion of fish from the Ob and Vakh Rivers. It was noted that the pike had a significantly high percentage of infection with D. latum, 71.64%. The highest intensity of invasion and localization of larvae (the family Diphyllobothriidae) was on the abdominal wall of the fish, and then on walls and in the thickness of walls of esophagus and stomach, in eggs, and very few in muscle tissues.

scholarly journals METHODOLOGICAL APPROACHES FOR ASSESSING THE IMPACT OF NATURAL AND ANTHROPOGENIC FACTORS ON RIVER GEOSYSTEMS

2021 ◽  
Vol 26 (2) ◽  
pp. 30-39
Author(s):  
N. E. Volkova ◽  
◽  
S. V. Podovalova ◽  
L. R. Umerova ◽  
◽  
...  
Keyword(s):  
Water Management ◽  
Water Resources ◽  
Water Resource ◽  
Anthropogenic Factors ◽  
Resource Potential ◽  
Rational Use ◽  
The Republic ◽  
The Stability ◽  
The Impact ◽  
Natural And Anthropogenic Factors

Introduction. The increasing shortage of water resources in the Republic of Crimea, due to water supplies from the external water source being shut off, emphasized the need to rationally use the existing water resource potential, which in turn requires a balance between the water users’ interests and maintaining a favorable environmental situation in the peninsula’s watercourses. Although in Russian and global practice there is a whole range of approaches to assessing the impact of natural and anthropogenic factors on the state of river geosystems, not all of them are applicable to solving the indicated problem. Methods. By testing integrated techniques, methods and models for assessing the impact of human activity on the stability of river natural and engineering systems (using the Zuya River as an example), we selected the most appropriate approach to develop viable solutions in water management. Results. By comparing the possibilities of using the scoring index method to assess the stability and vulnerability of watercourses to changes in physical and geographical as well as hydrological parameters and water quality, and methodology for the integrated assessment of the geoecological state of water resources of small rivers and the system model “Minor River Basin”, we revealed that only with the use of the latter it is possible not only to assess the real situation but also identify the reasons that impede the rational use of the peninsula’s watercourses. Conclusion. When developing decisions related to water management in the Republic of Crimea, the use of a suitable methodological approach to assessing the impact of natural and anthropogenic factors on the stability of river geosystems will make it possible to avoid mistakes when choosing measures and prioritizing actions aimed at the rational use of the existing water resource potential.

Transarterial embolization of peripheral arteriovenous malformations with ethylenevinyl alcohol copolymer - feasibility, technical outcomes, and clinical outcomes

VASA ◽  
2016 ◽  
Vol 45 (6) ◽  
pp. 497-504 ◽  
Author(s):  
Tom De Beule ◽  
Jan Vranckx ◽  
Peter Verhamme ◽  
Veerle Labarque ◽  
Marie-Anne Morren ◽  
...  
Keyword(s):  
Clinical Outcomes ◽  
Clinical Improvement ◽  
Arteriovenous Malformations ◽  
Clinical Success ◽  
Transarterial Embolization ◽  
Recurrent Bleeding ◽  
Complete Disappearance ◽  
Ethylene Vinyl Alcohol ◽  
Initial Symptoms

Abstract. Background: The technical and clinical outcomes of catheter-directed embolization for peripheral arteriovenous malformations (AVM) using Onyx® (ethylene-vinyl alcohol copolymer) are not well documented. The purpose of this study was to retrospectively assess the safety, technical outcomes and clinical outcomes of catheter-directed Onyx® embolisation for the treatment of symptomatic peripheral AVMs. Patients and methods: Demographics, (pre-)interventional clinical and radiological data were assessed. Follow-up was based on hospital medical records and telephone calls to the patients’ general practitioners. Radiological success was defined as complete angiographic eradication of the peripheral AVM nidus. Clinical success was defined as major clinical improvement or complete disappearance of the initial symptoms. Results: 25 procedures were performed in 22 patients. The principal indications for treatment were pain (n = 10), limb swelling (n = 6), recurrent bleeding (n = 2), tinnitus (n = 3), and exertional dyspnoea (n = 1). Complete radiological success was obtained in eight patients (36 %); near-complete eradication of the nidus was achieved in the remaining 14 patients. Adjunctive embolic agents were used in nine patients (41 %). Clinical success was observed in 18 patients (82%). Major complications were reported in two patients (9 %). During follow-up, seven patients (32 %) presented with symptom recurrence, which required additional therapy in three patients. Conclusions: Catheter-directed embolisation of peripheral AVMs with Onyx® resulted in major clinical improvement or complete disappearance of symptoms in the vast majority of patients, although complete angiographic exclusion of the AVMs occurred in only a minority of patients.

The Rational use of Cocaine in Surgery

1896 ◽  
Vol 41 (1064supp) ◽  
pp. 17013-17014
Author(s):  
Claude A. Dundore
Keyword(s):  
Rational Use
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