scholarly journals Particularităţile ihtiofaunei din zona de confluență a râului Răut cu fluviul Nistru în perioada reproductivă

2019 ◽  
Author(s):  
Dumitru Bulat ◽  
◽  
Denis Bulat ◽  
Marin Usatii ◽  
Nina Fulga ◽  
...  
Keyword(s):  
Ecological Status ◽  
The State ◽  
Large Rivers ◽  
Riparian Ecosystems ◽  
Fish Resources ◽  
Lotic Ecosystem

At present, particular attention is paid to large rivers without realizing that the ecological status of a large lotic ecosystem depends on the state of its tributaries. Thus, in the conditions of growing anthropogenic presetting, we aimed to demonstrate the importance of the ecotone zones formed between two riparian ecosystems of different sizes, in order to ensure the welfare of the fish resources on both sides.

scholarly journals Water Quality as an Indicator of Stream Restoration Effects—A Case Study of the Kwacza River Restoration Project

Water ◽  
2018 ◽  
Vol 10 (9) ◽  
pp. 1249 ◽  
Author(s):  
Natalia Mrozińska ◽  
Katarzyna Glińska-Lewczuk ◽  
Paweł Burandt ◽  
Szymon Kobus ◽  
Wojciech Gotkiewicz ◽  
...  
Keyword(s):  
Water Quality ◽  
Cross Sections ◽  
Physicochemical Parameters ◽  
River Restoration ◽  
Ecological Status ◽  
Riparian Ecosystems ◽  
Left Tributary ◽  
Agricultural Areas ◽  
Natural Characteristics

River restoration projects rely on environmental engineering solutions to improve the health of riparian ecosystems and restore their natural characteristics. The Kwacza River, the left tributary of the Słupia River in northern Poland, and the recipient of nutrients from an agriculturally used catchment area, was restored in 2007. The ecological status of the river’s biotope was improved with the use of various hydraulic structures, including palisades, groynes and stone islands, by protecting the banks with trunks, exposing a fragment of the river channel, and building a by-pass near a defunct culvert. The effects of restoration treatments were evaluated by comparing the physicochemical parameters of river water along the 2.5 km restored section between the source and the mouth to the Słupia, before restoration and 6 years after hydrotechnical treatments. A total of 18 physicochemical parameters were analyzed at 10 cross-sections along the river. The greatest changes were observed in the concentrations of NO3−-N and NH4+-N, which decreased by 70% and 50%, respectively. Dissolved oxygen concentration increased by 65%. Chloride values increased by 44%, and chlorophyll-a concentration increased by 30% after the project. The cut-off channel (by-pass), semi-palisades, and single groynes were the treatments that contributed most to water quality improvement. The results of this study indicate that river restoration projects can substantially reduce nitrogen pollution, which is particularly important in agricultural areas. Such measures can effectively reinstate natural conditions in river ecosystems. Hydrochemical monitoring is required to control the parameters of restored rivers.

Ephemeral wetlands as significant habitat for threatened crayfish in Alabama, USA

2015 ◽  
Vol 21 (1) ◽  
pp. 147-152
Author(s):  
Michael R. Kendrick ◽  
Alexander D. Huryn
Keyword(s):  
United States ◽  
Southeastern United States ◽  
The State ◽  
Large Rivers ◽  
Undescribed Species ◽  
Freshwater Biodiversity ◽  
Ephemeral Wetlands ◽  
Crayfish Species ◽  
Wetland Habitats ◽  
Imperiled Species

Abstract While ephemeral wetlands contribute significantly to regional freshwater biodiversity, their role in supporting threatened and imperiled species of crayfish is not widely recognized. As the center of global crayfish biodiversity, the southeastern United States (US), and the state of Alabama (AL) in particular, are important focal areas where information is needed to develop understanding of habitat constraints determining the distributions of crayfish species. To this end, we documented crayfish species associated with ephemeral wetlands and associated wetland habitats that have been traditionally under sampled. Fifteen species of crayfish were documented among 96 survey sites. This assemblage included three Alabama state-listed Priority 1 species [Cambarellus diminutus Hobbs, Fallicambarus burrisi Fitzpatrick, Procambarus viaeviridis (Faxon)] and five Priority 2 species [Hobbseus prominens (Hobbs), Orconectes lancifer (Hagan), Procambarus evermanni (Faxon), P. leconti (Hagan), P. marthae Hobbs]. An undescribed species of Cambarellus (“sp. A”) was also documented, and will presumably be eventually designated a Priority 1 species in Alabama due to its restricted distribution and apparent endemism. Ten species of crayfish were documented from ephemeral wetlands, including four Priority 1 and 2 species [Cambarellus sp. A (presumed Priority 1 species), H. prominens, P. marthae, P. viaeviridis]. Most populations of Priority 1 and 2 species we documented are within the 100-year floodplain of the Black Warrior River. Ephemeral wetlands and associated wetland habitats within the floodplains of large rivers thus appear to be vital habitat for threatened and imperiled crayfish in Alabama. Our results suggest that future crayfish surveys should include sampling of these important but often overlooked habitats.

scholarly journals ASSESSMENT OF THE STATE OF FISH RESOURCES OF LAKE BOROVOE

2021 ◽  
Vol 6 (8(58)) ◽  
pp. 8-14
Author(s):  
A.V. Shutkarayev ◽  
G.K. Barinova ◽  
A.S. Assylbekova
Keyword(s):  
The State ◽  
Fish Resources

This article provides an assessment of the state of fish resources of Lake Borovoe. 5 stations were surveyed to study the ichthyofauna. Currently, the lake is home to 12 species of fish from 5 families. The most widely represented family of carp is represented in Lake Borovoe, 5 species are noted, 3 species are found from the whitefish family, 2 species from perch, the pike and balitor families are represented by 1 species. In general, the state of fish resources in Lake Borovoye is assessed as satisfactory. According to the results of research fishing, it was established that the organization of amateur (sports) fishing, fishing for reproductive purposes, and research fishing is possible in Lake Borovoye.

scholarly journals Actual status of fishing reserves of the Yesil River

2019 ◽  
Vol 36 ◽  
pp. 1-9
Author(s):  
Zhumagazy Kurzhykayev ◽  
Kuanysh Syzdykov ◽  
Ainur Assylbekova ◽  
Dinara Sabdinova ◽  
Viktor Fefelov
Keyword(s):  
Biological Diversity ◽  
Biological Indicators ◽  
The State ◽  
Reference Points ◽  
Boundary Values ◽  
Sustainable Fisheries ◽  
Fish Stocks ◽  
Fish Resources ◽  
Managerial Decisions ◽  
Careful Management

In this article, the study and prediction of the state of fish resources in the Yesil River was carried out to determine the boundary reference points of the reserve and management decisions in case they are exceeded, to ensure sustainable fisheries and preserve biological diversity. Ichthyological studies, retrospective analyses and rankings of the effects of the water supply of the Yesil River on fish stocks have been carried out, critical values ​​of the biomass of fishing reserves have been determined, as criteria for biologically safe fishing values and targets for management of fish stocks at reaching the boundary values ​​of 24.03 tonnes have been established. According to the results of studies of basic biological indicators, it was determined that roach, bream, pike and perch populations each had an LC50 above LM50, which indicates their low utilization in the fishery industry. A strategy for management of fish stocks, recommendations for the conservation of fishery resources and their rational use has been developed as a result of these findings. The list and status of the monitored indicators for the careful management of fish stocks, as well as a list and indicators of the boundary indicators for the state of fish stocks, was established. These parameters included the fish size of 50% of the sampled fish and 50% of maturity achieved, where the LC50 was observed in the fish in question from 19 to 45.4 cm and LM50 from 12.3 to 41 cm, respectively. The minimum and maximum river levels that ranged from 111 up to 159 cm, as well as the critical value of the commercial reserve, corresponded to the boundary value of 24.03 tonnes. The results of this work will serve as the basis for making future managerial decisions, necessary for sustainable fisheries and conservation of the biological diversity of the Yesil River.

scholarly journals COMPARATIVE BIOELECTRONIC DIAGNOSTICS OF THE ECOLOGICAL STATE OF POLLUTED WATER AREAS (ON THE EXAMPLE OF SOME CHANNELS OF THE VOLGA DELTA)

2021 ◽  
Author(s):  
Sergey V. Kholodkevich ◽  
Maxim K. Motruk ◽  
Vasiliy A. Lyubimtsev ◽  
Olga N. Susloparova
Keyword(s):  
Ecological Status ◽  
Water Area ◽  
The State ◽  
Polluted Water ◽  
Ecological State ◽  
Volga River ◽  
Volga Delta ◽  
Environmental Status ◽  
Quality Coefficient ◽  
The Russian Federation

The objects of bioindication of the ecological state were 3 channels of the Volga Delta, located both directly in Astrakhan and in the Astrakhan region. The aim of the work was to conduct a comparative bioelectronic diagnosis of the ecological state of the selected channels with different local anthropogenic loads, both by type and size, based on assessments of the functional state (health) of the bivalve mollusks Anodonta anatina living in them, estimated on the basis of an analysis of their cardiorhythm, measured using an original fiber-optic bioelectronic system. It was found that shellfish selected from different water areas, after 1hour functional load, restore the original heart rate for different times, but in the range from 117 to 166 minutes, which is typical for shellfish living in significantly polluted reservoirs of the same ecological status - "Bad". This characteristic of the water areas completely coincides with the characteristic of the ecological state of the channels of the Volga River Delta specified in the State Report "On the state and on Environmental Protection of the Russian Federation in 2017". The authors proposed and justified the possibility of using the water area of the Gandurino River as a conditional reference for the Volga Delta region. In this case, according to the value of the environmental quality coefficient EQR, the channels of the Urban Branch and the Small Channel can be attributed to the regional environmental status - "Good".

scholarly journals Dynamics of changes in protein metabolism rates in cows depending on the season of the year and the location of the farm

2019 ◽  
Vol 21 (93) ◽  
pp. 164-168
Author(s):  
U. M. Vus ◽  
O. V. Kozenko
Keyword(s):  
Total Protein ◽  
Protein Metabolism ◽  
Ecological Status ◽  
The State ◽  
The Body ◽  
State Chemical ◽  
High Level ◽  
And Function ◽  
Internal And External Factors ◽  
Autumn And Winter

Protein metabolism in animals is perhaps the most informative indicator of anthropogenic environmental pollution, because it provides an opportunity to characterize metabolic processes in the body. They are of the utmost importance for the structure and function of all cells, tissues and organs. Proteins reflect the state of the organism, as well as those changes that occur in it under the influence of internal and external factors. We studied the dynamics of changes in indicators in protein metabolism in cows depending on the season of the year and the location of a farm. The research was carried out in two farms of the Lviv region: the Danylo Halytskyj LLC, near the State Mining and Chemical Enterprise “Sirka”, and FE “Lelyk” of Zhovkva district, in spring, summer, autumn and winter periods of keeping. The object of research was the blood of 20 cows of Ukrainian Black-Spotted breed. According to the results of the research, a reduction in total protein, relative to the physiological norm of 0.45 g/l. in spring, and by 0.64 g/l in the summer, dysproteinemia, a high level of gamma globulin fraction (50.30%) in cows from the Danylo Halytskyj farm, located in the zone of influence of the State Chemical Medicine Plant “Sirka”. In animals FE Lelyk, located in the conventionally clean zone, this indicator was significantly higher, and was 76.14 g/l in spring, and 78.17 g/l in summer, and also in animals of this farm dysproteinemia was not observed. In the autumn, at the end of the summer grazing period of the keeping, the index of total protein tended to decrease in the animals of the Danylo Halytsky's Ltd., and in winter it was normalized and invested in the limits of the physiological norm. Albumin fraction of protein in this group of animals, throughout the search period, had a tendency to increase. In the cows of the FE “Lelyk”, the indices of protein metabolism were within the limits of the physiological norm in all periods of research, with the inherent fluctuations in the season of the year. The obtained results due to the content of total protein and protein fractions in the plasma of blood of cows kept in territories with different ecological status indicate that the effect of the activity of the State Chemical Medicine Plant “Sirka” is sufficiently strong on the organism of animals.

ПРОБЛЕМЫ ФОРМИРОВАНИЯ УСТОЙЧИВОГО РАЗВИТИЯ ГОРОДСКИХ ТЕРРИТОРИЙ (ЭКОЛОГИЧЕСКИЙ АСПЕКТ)

2019 ◽  
Author(s):  
N.A. Narbut
Keyword(s):  
Sustainable Development ◽  
Natural Environment ◽  
Spatial Organization ◽  
Ecological Status ◽  
The State ◽  
Property A ◽  
Natural Processes ◽  
Landuse Planning ◽  
The World ◽  
The City

В последние десятилетия в мире наблюдается беспрецедентный рост городов, который приводит к возникновению серьезных проблем, указывающих на то, что большинство городов мира развиваются неустойчиво. Экологические проблемы городов можно разделить на три группы: проблемы, связанные с территориальной организацией (территориальное планирование), состоянием природной среды и изменением развития природных процессов. Деление это условное, однако, поскольку территориальное планирование оказывает влияние и на состояние природной среды, и на последствия развития природных процессов, оно рассматривается как ключевое звено формирования устойчивого развития. В работе, исходя из важнейшего критерия устойчивого развития в мире достижение стратегического баланса между деятельностью человека и поддержанием воспроизводящих возможностей биосферы, выявлены основные проблемы современного планирования городской территории. Первая: в градостроительных документах городская и пригородная территория не рассматривается как единая система. Показано, что в пределах городской черты крупного города невозможно сбалансировать экологостабилизирующие и хозяйственные функции земель. Первичной территориальной основой, на которой можно обеспечить экологическое равновесие является город и его пригород. Вторая: не учитывается стадия урбанизации территории, которую определяет показатель освоенности региона. Находясь на первой стадии дифференциальной урбанизации, территория Дальнего Востока имеет в своем развитии ряд особенностей, одна из которых поляризованность территориальной структуры хозяйства. Как следствие наличие неосвоенных зон, обладающих ценнейшим, не учитываемым свойством высокой долей сохранности естественной природы, что позволяет рассматривать их как ресурс для усиления экологической составляющей в формировании устойчивого развития. Третья: зонирование территории происходит по типам пользования, при этом земли экологического назначения не выявляются. Четвертая: целевые программы по улучшению экологического состояния городов РФ унифицированы. В них не акцентируются региональные проблемы, не выявляются земли, перспективные для экологического использования, что могло стать основанием для начала работ по экологическому планированию. In recent decades, the world has seen an unprecedented growth of cities, which leads to the emergence of serious problems indicating that most cities in the world are developing unsustainably. The environmental problems of the cities can be divided into three groups: the problems related to spatial organization (landuse planning), the state of the natural environment and changes in the development of natural processes. This division is conditional, however, since landuse planning influences the state of the natural environment and the consequences of the development of natural processes, it is considered as a key element in the formation of sustainable development. In the paper, based on the most important criterion of sustainable development in the world the achievement of a strategic balance between human activity and the maintenance of the reproducing capabilities of the biosphere, the main problems of modern planning of an urban area are identified there are several of them. The first problem is that in the urban planning documents, the urban and suburban areas are not considered as a single system. It is shown that within the city limits of a large industrial city it is impossible to balance the economic and environmental stabilizing functions of land. The primary territorial basis, on which it is possible to ensure ecological balance, is the city and its suburbs. The second problem: the stage of urbanization of the territory, which is determined by the indicator of development of the region, is not taken into account. Being in the first stage of differential urbanization, the territory of the Far East has in its development a number of features one of which is the polarization of the territorial structure of the economy. This leads to the emergence of undeveloped zones that have the most valuable, not taken into account property a high proportion of natural preservation, which allows us to consider them as a resource for strengthening the environmental component in shaping sustainable development. The third problem: zoning of the territory takes place according to the types of use, while ecological lands are not detected. The fourth problem: targeted programs to improve the ecological status of the Russian cities are unified. They do not emphasize regional problems and do not identify land that is promising for environmental use, which could be the basis for starting work on environmental planning.

Fish fry associations: Important indicators for the ecological status of large rivers

1991 ◽  
Vol 24 (4) ◽  
pp. 2497-2500 ◽  
Author(s):  
F. Schiemer ◽  
T. Spindler ◽  
H. Wintersberger ◽  
A. Schneider ◽  
A. Chovanec
Keyword(s):  
Ecological Status ◽  
Large Rivers

scholarly journals Sinking of vessel as the country’s efforts in keeping the utilization of sustainable fish resources

2018 ◽  
Vol 74 ◽  
pp. 12002
Author(s):  
Amelia Rahmi ◽  
Melda Kamil Ariadno
Keyword(s):  
International Law ◽  
The State ◽  
Legal Form ◽  
Enforcement Action ◽  
Fish Resources ◽  
The World ◽  
Fish Exploitation ◽  
The Government

Indonesia as a country with considerable fisheries potential has an attraction for the activity of catching fish. Exploitation as well as the demand for fish in the world against the increasing Indonesia country characterized by the presence of Illegal, Unregulated and Unreported Fishing. Therefore, the Government of Indonesia started to renew the regulation of fisheries to Act No. 45 of the year 2009 about Fisheries. One of the sound section is Indonesia's efforts to maintain sustainable fish resources. This particular action is attempting to keep the utilization of sustainable fish resources. In addition, as the participating countries of the 1982 UNCLOS, Indonesia refers to the rules of international law in creating a policy. Article 73 gives the obligation for the State to exercise sovereign that it is necessary to avoid excessive exploitation occurred in the zone. Sovereign right in question is a legal form of enforcement action the scuttling of the vessel.

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