scholarly journals COMPARATIVE ANALYSIS OF MORPHOMETRIC INDICATORS OF STERLET IN WINTERING HOLES OF THE LOWER IRTYSH

Author(s):  
Andrey Stepanovich Aldokhin ◽  
Gleb Igorevich Volosnikov

The article describes the results of morphometric studies of sterlet caught in water areas of two riverbed depressions of the Lower Irtysh (the Tyumen region) The studies were carried out in the period from 2015-2018, the riverbed depressions were remote from each other: Gornoslinkinskaya (the Uvat region), Kondinskaya (the Khanty-Mansiysk region). The geographic distance (the distance between the riverbed depressions is 445 km) and short migration length (about 200 km) prompted the assumption about the probability of significant discrepancies in the signs that suggest the allocation of any subgroups of sterlet. In the catches of sterlet in the Kondinskaya riverbed depression there were 93 specimens aged 1-4 years old. In the water area of the Gornoslinkinskaya riverbed depression 128 specimens were caught at the age of 1-7 years old. The comparison of sterlet groups from remote riverbed depressions was conducted using meristic signs: the number of bone plates (scutes) rays in the fins, the number of stamens on the first gill arch. According to the research results, it has been stated that there are no significant differences in the number of dorsal, lateral and ventral bone plates. Also, no differences were found in the number of stamens on the first gill arch. The greatest differences in the studied groups of sterlet were recorded in terms of the number of rays in the dorsal and anal fins. Additionally, the meristic features have been estimated by Mayr coefficient (1971), the value of which is equal to or greater than 1.28, which suggests the subspecific division. In our study, Mayr coefficient in all cases was less than 1.28, its maximum value (0.38) was established in studying the number of stamens on the 1-st gill arch. As for the remaining signs, this value is even smaller. Thus, geographical distance (over 400 km) of sterlet groups from the 2 riverbed depressions of the Lower Irtysh should not be taken as a reason to single out any subgroup.

Jurnal Segara ◽  
2018 ◽  
Vol 14 (2) ◽  
Author(s):  
Aprizon Putra

Padang city has a coastline 80.24 km with a water area 72,000 ha, and 19 small islands. Overall, coastal in Padang City consists of beach sloping 41.52 km, cliff 22.08 km, muddy 8.19 km, and type of artificial beach in form of building coastal protection. The research aims at identifying suitability for ecotourism beach (category of recreation beach and mangrove). The methodology used ie with the matrix of suitability ecotourism beach using geospatial approach. Research results for suitability category recreation beach in 24 locations in beach Padang City 18 locations are in the category of very suitable with a value 82.28 % and only beach in Bung Hatta University are in category conditional with a value 27 %. Suitability category ecotourism mangrove in 19 locations in beach Padang City 6 location is in a category is in accordance with a value 92.11 % and 4 location is in a category conditional/not suitable to value 50.88 %.


Author(s):  
Andrey Stepanovich Aldokhin ◽  
Gleb Igorevich Volosnikov

In the summer period (June-July) of 2018 on the Irtysh river (the Tobolsk region) in the control catches of sterlet there were found specimens with pronounced differences from individuals inhabiting this water area. Differences were found in the form of bone plates and linear-weight characteristics. Later, local fishermen reported on many cases of specimens having the above differences. Reports about the similar species came from the Uvat region. In order to establish the belonging of these individuals to a particular family there have been investigated meristic features which are considered diagnostic for sturgeon species, as well as for hybrids. In the result of the study there was made a conclusion about belonging of these specimens to the genus Acipenser and, most likely, to the sterlet species.


2018 ◽  
Vol 3 (86) ◽  
Author(s):  
Natalja Kočergina ◽  
Algirdas Čepulėnas ◽  
Aurelijus Zuoza

Research background and hypothesis. Modern training trend for biathletes is the increasing intensity of the training process in competition activities. Competition activities of elite biathletes while preparing for the main competition of the season have received little attention by researchers. Research hypotheses: The number of starts and sports results in the competitions before the main competition of the season for elite biathletes are related to sports results in the main competition of the season. Research  aim  was  to  analyse  the  interaction  of  biathletes’  sports  results  and  the  number  of  starts,  and  to establish the relation of this interaction between the results achieved in World Cup competitions and World Biathlon Championship.Research methods. The data have been retrieved from the documents of the International Biathlon Union (IBU): protocols of the World Biathlon Championship of 2011 and World Biathlon Cup competition. We analysed the sports results of female biathletes who took the 1 st –10 th  places in the World Biathlon Championship in individual events. Research results. World elite biathletes participated in E.ON and IBU category competitions 16.2 ± 3.74 times before the World Biathlon Championship. The number of starts correlates with the places taken by biathletes in the general account of the World Biathlon Cup before the world championship (r = –0.83). In the individual races in the World Championship, all medals were won by eight skiers, and five of them were among the first ten skiers in the general standing of World Cup competitions before the world championship.Discussion and conclusion. The preparation of elite biathletes for the most important competition of the season  – World Biathlon Championship is grounded on the repeated participation in the World Biathlon Cup competitions. Biathletes, taking the 1 st –10 th  places in the general account of the World Biathlon Cup, are real applicants for medals in the World Biathlon Championship.Keywords: number of starts, taken places, correlation, sprint, pursuit, mass start, individual start.


Author(s):  
Andrey Aleksandrovich Chemagin

The article describes a new locality of the formed wintering riverbed depression discovered in the erosion zone of the isthmus of conjugate meanders of the Irtysh river for the rational use and effective protection of aquatic biological resources in places of their concentration in the Irtysh river basin (Western Siberia, the Russian Federation. The morphology of the riverbed depression was mapped (relief and bathymetric maps). The maximum depths in the channel depression exceeded 27 m. The channel depression and 4 control river sections were studied. The analysis of hydroacoustic surveys showed that in the wintering riverbed depression there is, according to the statistical data, higher fish density compared to the control areas: in the water area of the riverbed depression the average fish density made 4 524 species/ha, in the control sections 245-2091 sp./ha. The cluster analysis based on the fish density and the size-taxonomic composition of the ichthyofauna has revealed that the riverbed depression is being separated into a cluster, but at the same time goes to the control section No. 4, which is located downstream, where further erosion of the river channel is registered. In this regard, the minimum protection zone of the wintering channel depression should include the water area of the channel depression and the water area of control section No. 4. In the water areas of the riverbed depression and control sections in the spring period, cyprinids dominate - up to 65% of the total number of fish, percids are represented to a lesser extent - 36.76%, coregonids and pikes - up to 18.18, sturgeons - up to 9.31%. The given locality of the wintering riverbed depression must be included in the list of protected river sections of the Fishing Rules for the West Siberian fishery basin for developing the effective strategy for the protection, restoration and rational use of aquatic biological resources, including rare and endangered fish species of the Irtysh River and the whole Ob-Irtysh basin


2021 ◽  
pp. 77-80
Author(s):  
S.A. Gumenyuk ◽  

The aim of the study is to analyze the main results of optimization of the work of aviation medical brigades in a metropolis and the dynamics of typical reasons for refusal to use an ambulance helicopter. Materials and research methods. The article presents the characteristics of the BK-117C-2 (EC-145) helicopter used to deliver patients to a specialized medical organization. A retrospective analysis of all aviation medical brigades flights of the Scientific and Practical Center for Emergency Medical Aid of the Moscow Department of Health in 2017–2019, as well as a comparative analysis of aviation medical brigades performance indicators for 2005–2007 and 2017–2019, was carried out. The main compared indicators: time from the call to the departure of an ambulance helicopter to a patient; time of aviation medical brigade arrival to the place of call; total time before the patient is admitted to a specialized hospital; typical reasons for a refusal to use a helicopter when there is a call for it. Research results and their analysis. The analysis of the research results led to the following conclusions: use of helicopters to provide emergency medical care and to carry out air ambulance evacuation of patients in a metropolis makes it possible to successfully solve a number of complex problems. With the start of optimization and the introduction of algorithms for the operation of ambulance helicopters, flight time to a patient decreased by 2019, compared to 2007, by 1.9 times – from (33.2±1.07) to (17.8±0, 72) min; when evaluating the results of optimizing the aviation medical brigades work in Moscow, it should be borne in mind that there are objective limitations when using an ambulance helicopter. If you do not take into account reasons such as a patient’s refusal or a lack of indications for helicopter evacuation, impossibility of using an ambulance helicopter in the metropolis was on average: in 2017–2019 – 6.51% (210 cases per 3227 applications); in 2005-2007 – 10.23%. For about 10 years, impossibility of evacuating a patient to a specialized hospital has decreased for objective reasons by 3.72%, which emphasizes the effectiveness of the developed algorithms for air ambulance evacuation of urgent patients in a metropolis.


Problemos ◽  
2019 ◽  
Vol 96 ◽  
pp. 172-183
Author(s):  
Dmitry Anatolyevich Belyaev ◽  
Ulyana Pavlovna Belyaeva

The article explores one of the most remarkable and dynamic phenomena of modern technoculture – video games. It reconstructs the genesis of the philosophical discourse on video games, exposing the main difficulties arising in making the definitions. Special importance is attached to the critical comparative analysis of the major strategies for the philosophical explication of video games. With the aid of the method of comparative-historical reconstruction and a structuralist approach, the essential correlations between the essential definition of a video game and the ontological systems of Plato, the Gnostics, G. Berkeley, E. Kant, as well as post-modern philosophy was established. The research results in formulating a model-integrative definition of a video game.


2021 ◽  
Vol 569 (8) ◽  
pp. 10-18
Author(s):  
Dorota Kałuża-Kopias

For several years, a high dynamics of growth in the number of foreigners from Eastern European countries taking up employment in Poland has been visible. Undoubtedly, the decline in unemployment, which translates into the ease of finding a job, and the systematic increase in the average salary have an impact on this situation. The aim of this article is to check what and to what extent influences the decision to work by Ukrainian citizens in different regions of the country. This study focuses on three key factors – how the scale of immigration to a given poviat is influenced by the distance at which migrations are undertaken, the level of wages and unemployment in the examined poviats. To achieve the above goal, a popular model describing migrations as a function of geographical distance, called the gravity model, was used. The results of the analysis show that wages are a significant stimulus of economic migration to Poland, and the level of unemployment had a destimulating effect. The estimated values of the parameters indicate a much stronger attracting effect of the level of wages than the impact of unemployment on the migration inflow. Geographic distance is a factor that also limits the intensity of movements. However – as the analysis showed – its limiting influence is much smaller than that of unemployment.


2014 ◽  
Vol 539 ◽  
pp. 752-756
Author(s):  
Chao Zhang ◽  
Bo Fu Li ◽  
Zong De Wang ◽  
Jian Yong Zou ◽  
Ying He Jiang

All the rainfall data from 1983 to 2012 in HScity were collected andthe annual maximum value method was adopted to select the samples. Parameters of storm intensity formula of single return period were calculated through the optimization method and the least square methodfor itP tables.Then, the storm intensityformula was established. Through the comparative analysis of the precision of both the new formula and old one,the result indicated that the absolute mean square deviation and relative mean square deviation of new formula were less than 0.05mm/min and 5%,while old formula cannot meet the requirement ofoutdoor wastewater engineering design.


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