scholarly journals Freshwater mollusks of the Priplotinny Ples Reach, the Kuibyshev Reservoir (middle Volga River, Russia)

2021 ◽  
Vol 818 (1) ◽  
pp. 012029
Author(s):  
R A Mikhailov
Keyword(s):  
Kuibyshev Reservoir ◽  
Volga River ◽  
Middle Volga ◽  
Freshwater Mollusks

scholarly journals Some features of crustacean cultivation aquabiotechnology on the waters of energy facilities

2021 ◽  
Vol 288 ◽  
pp. 01047
Author(s):  
Marina Kalaida ◽  
Madina Khamitova ◽  
Svetlana Borisova
Keyword(s):  
Body Weight ◽  
The State ◽  
Natural Ecosystems ◽  
Kuibyshev Reservoir ◽  
Volga River ◽  
Middle Volga Region ◽  
Recirculating Aquaculture ◽  
Recirculating Aquaculture Systems ◽  
Middle Volga ◽  
Red Claw Crayfish

The data on the state of the crayfish population on the territory of the Middle Volga before its regulation and after the formation of reservoirs are presented. Three stages in the state of development of aquabiotechnology of the crustaceans cultivation in the Middle Volga region have been identified. The first stage is before regulation of the Volga river. The second stage is pasture aquaculture in reservoirs with works on the targeted improvement of aquatic ecosystems. It is shown that the size-weight and ecological-biological characteristics of long-clawed crayfish before the regulation of the river and after the formation of the Kuibyshev reservoir are similar. The third stage is highlighted in connection with the expansion of biotechnologies for growing thermophilic crayfish in recirculating aquaculture systems. At the present stage, in the Kuibyshev and Nizhnekamsk reservoirs, there are narrow-clawed (Pontastacus leptodactylus Esch.) and wide-clawed crayfish (Astacus astacus L.). The catches contain crayfish of three ages: two-year-olds - about 100 mm, three-year-olds - about 150 mm, four-year-olds - about 170 mm long. The equation for the dependence of body weight on the zoological length of narrow-clawed crayfish in the Kuibyshev reservoir: y = 0.67x +81.3. The cultivation of the red claw crayfish Cherax quadricarinatus (VonMartens, 1868) on the warm waters of energy facilities can become an important element of aquaculture for the production of elite gourmet products. The equation for the dependence of body weight on the zoological length of red claw crayfish in a recirculating aquaculture system: y = 1.1x +57.3. The development of aquatic biotechnologies makes it possible to use natural crayfish populations for the creation of crayfish farms and pasture aquaculture on the basis of reservoir waters, and the use of warm waters makes it possible to grow new aquaculture objects for the industrial crayfish cultivation all year round. At the same time, natural ecosystems are not disturbed, and the rate of growth of marketable products under controlled production conditions allows not only to increase the volume of aquaculture products, but also to reduce the pressure of catch of crayfish from natural ecosystems.

scholarly journals Distribution and species composition of zooplankton (rotifers and crustaceans) in the Basin of the Middle Volga River, Russia

2021 ◽  
Vol 9 ◽  
Author(s):  
Oksana Mukhortova ◽  
Stepan Senator ◽  
Elena Unkovskaya
Keyword(s):  
Species Composition ◽  
River Basin ◽  
Native Species ◽  
Biosphere Reserve ◽  
Zooplankton Species ◽  
Kuibyshev Reservoir ◽  
Volga River ◽  
Volga River Basin ◽  
Samara Oblast ◽  
Middle Volga

The presented dataset contains information on the distribution and species composition of zooplankton (rotifers and crustaceans) registered in the Basin of the Middle Volga River, Russia. The studies have been performed in the Kuibyshev Reservoir (Samara Oblast and the Republic of Tatarstan), the Saratov Reservoir (Samara Oblast), in several lakes (Raifskoe, Gniloe, Krugloe and Lenevo) in the Volzhsko-Kamsky State Biosphere Reserve (Republic of Tatarstan) and in Lake Aslikul, one of the largest lakes of the Middle Volga River Basin, located in the Asly-Kul Natural Park (Republic of Bashkortostan). The hydrobiological data were obtained and published from 1957 to 2020. In total, the dataset includes 5141 records of 111 zooplankton species (including 17 subspecies), belonging to 45 genera. These are mainly native species - 98.5%, while the naturalised, including invasive species, accounts for less than 1.5%. A total of 5141 records have been published on the taxonomic diversity and occurrence of zooplankton (rotifers and crustaceans) in the Middle Volga River Basin. Each record includes information about the place and date of finding the specimen, its taxonomy, occurrence and abundance and the collector. If the information about the find has been published, a link to the corresponding reference is provided. The presented dataset supplements the data on the distribution of zooplankton species in the European part of Russia. Data on zooplankton in the Middle Volga River Basin are published for the first time.

scholarly journals The Pollutants Distribution Types in the Middle and Lower Volga Water and Bottom Sediments

2017 ◽  
Author(s):  
Keyword(s):  
Bottom Sediments ◽  
Petroleum Products ◽  
Water Area ◽  
Content Increase ◽  
Kuibyshev Reservoir ◽  
Volga River ◽  
Metal Compounds ◽  
Lower Volga ◽  
Volga Reservoirs ◽  
Iron Manganese

The outcomes of hydro/chemical and soil 1800 km long surveying of the Volga River from Kazan to Astrakhan have been analyzed. Conjugated analysis of the organic (petroleum products, phenols, and pesticides) and non-organic (metals – Cd, Co, Pb, Ni, Zn, Cr, Mn, Fe, Al) pollutants and their proportion in the Middle and Lower Volga (Kuibyshev, Saratov and Volgograd reservoirs) and unregulated part of downstream water and bottom sediments has been carried out. To test a hypothesis on the system interaction of different types of pollutants content distribution in water and bottom sediments their spatially determined comparative assessment has been applied for the first time. Three main types of the pollutants distribution within the“water-bottom sediments” system have been singled out: depositing, transit, and active/passive self-purification types. The “transit” type of metals distribution is typical for Kuibyshev reservoir. It is characterized by the higher metals concentration in water and the absence of their content increase in bottom sediments. Zones of self-purification from metal compounds have been found in water areas of Saratov and Volgograd reservoirs, while depositing zones are typical for the Volga downstream where metals accumulation in sediments have been found. A considerable portion of pesticides and petroleum products supplied to the Volga reservoirs’ ecosystems is accumulated by bottom sediments. The most part of the Middle and Lower Volga water area is a zone of active selfpurification in terms of phenol compounds. It has been shown that when the Volga environmental conditions is assessed the indicators of copper, nickel, as well as iron, manganese, cadmium and petroleum products in bottom sediments are the most informative.

scholarly journals Impact of natural fires on the vegetation cover of steppe and forest-steppe zones (European part of Russia, Middle Volga region)

2021 ◽  
Vol 265 ◽  
pp. 01019
Author(s):  
Valentina Ilyina ◽  
Anna Mitroshenkova ◽  
Stepan Senator ◽  
Vera Solovyeva ◽  
Stanislav Rogov
Keyword(s):  
Vegetation Cover ◽  
Volga Region ◽  
Forest Steppe ◽  
Volga River ◽  
Middle Volga Region ◽  
Plant Parts ◽  
Natural Fires ◽  
Zonal Vegetation ◽  
Middle Volga ◽  
The Impact

The effect of natural fires on the vegetation cover of steppe and forest-steppe zones in the south-east of European Russia (the middle course of the Volga River) has been evaluated. The research used methods of studying biosystems at organism, species, population and cenotic levels. The study revealed the possibility of regrowth of aboveground plant parts after fires, changes in the population structure of species, and resistance of populations and zonal plant communities to the effects of natural fires. The most vulnerable among zonal vegetation types are pine forests, feather-grass and petrophytic steppes. Frequency, intensity and area of natural fires in the Middle Volga region cause significant changes in the structure of vegetation cover and reduction of biodiversity. The results obtained in the study of the impact of fires on vegetation can be used in the planning and implementation of environmental and reforestation measures.

Sterlet reproduction in the Volga region as a complex structural problem of aquaculture development

2021 ◽  
pp. 8-17
Author(s):  
Marina Lvovna Kalayda ◽  
Svetlana Dmitrievna Borisova ◽  
Madina Farhadovna Khamitova ◽  
Andrey Andreevich Kalayda
Keyword(s):  
Fish Population ◽  
Fish Stock ◽  
Main Task ◽  
Kuibyshev Reservoir ◽  
Volga River ◽  
Late 20Th Century ◽  
Historical Aspect ◽  
Stage Of Development ◽  
Complex Structural ◽  
Genotypic Characteristics

Changes in the Volga River and its fish population are considered in the historical aspect. The importance of studies of sterlet in the composition of ichthyofauna in the period before the regulation of the river and after the creation of a cascade of reservoirs is shown. The ideas of ichthyologists of the early and late 20th century on the reproduction of sterlet are presented. Data on the decrease in catches of sterlet and its inclusion in the Red Data Books is presented. It is noted that for a long period the main task of sterlet reproduction was considered to be — release into natural reservoirs to replenish the local fish stock. The required amount of young sterlet for the annual release into the Kuibyshev reservoir for the task of removing sterlet from the Red Data Book was determined — 8.6 million. For the task of forming its livestock in accordance with the plan for reorganizing the “Big Volga” and increasing its catches to the planned values in catches in the reservoir, an annual release of 57 million pieces is required. The need is shown at the present stage of development of biotechnology for growing and reproducing sterlet in the structure of tasks to bring the commercial reproduction of sterlet and its hybrids to the first place in terms of volumes. This will provide people with healthy food and enhance the country’s food security. Dividing the reproduction of sterlet into separate tasks will also make it possible to involve in this process numerous farmers who are ready to raise sturgeon fish, but who do not have sufficient training to select fish in accordance with their genotypic characteristics. Expansion of commercial production will potentially relieve some of the load on natural aquatic ecosystems and optimize the release of juveniles.

Ecological and biological features of river crayfish in the modern conditions of the Kuibyshev reservoir

2021 ◽  
pp. 41-56
Author(s):  
Marina Lvovna Kalaida ◽  
Svetlana Dmitrievna Borisova ◽  
Madina Farhadovna Khamitova
Keyword(s):  
Body Weight ◽  
Chemical Analysis ◽  
Feed Additive ◽  
Modern World ◽  
Kuibyshev Reservoir ◽  
Middle Volga Region ◽  
Biological Features ◽  
Crayfish Population ◽  
Middle Volga ◽  
Edible Parts

Crayfish are considered as objects of consumption in the modern world. An increase in their share in the production of aquaculture objects is shown. The data on the state of the crayfish population on the territory of the Middle Volga before regulation, after the formation of the Kuibyshev reservoir and at the present time are presented. It was shown that the size-weight and ecological-biological characteristics of long-toed crayfish before regulation and after the formation of the reservoir are similar. The data on the modern size-age characteristics of populations of narrow-clawed crayfish in the Volga-Kama reach of the Kuibyshev reservoir are presented. It is shown that in the catches the basis is made up of three-year-olds 13–15 cm long and weighing about 80–100 g. The equation for the dependence of body weight on the zoological length of river narrow-clawed crayfish in the Volga-Kama reach of the Kuibyshev reservoir: y = 35,588x0,3073. The equation for the dependence of body weight on the commercial length of narrow-clawed crayfish in the Volga-Kama Reach of the Kuibyshev Reservoir: y = 29,409x0,3275. Chemical analysis of narrow-clawed crayfish revealed 12 elements. The following sequences of the content of elements in narrow-clawed crayfish from the Volga-Kama reach of the Kuibyshev reservoir were noted: in the muscle tissue of edible parts — Ca ˃K ˃S ˃P ˃Cu ˃Fe ˃Zn ˃Mn ˃ Br ˃Sr; in shell — Ca ˃Si ˃P ˃S ˃K ˃Sr ˃Ti ˃Fe ˃Mn ˃Cu ˃Br ˃Zn; in entire crayfish — Ca ˃K ˃P ˃Si ˃S ˃Sr ˃Fe ˃Mn ˃Cu ˃Ti ˃Br ˃Zn. In the edible parts of the narrow-clawed crayfish of the Volga-Kama reach of the Kuibyshev reservoir, there are no such hazardous elements as lead, arsenic, cadmium and mercury. Crayfish can be used as a feed additive in feed for aquaculture objects. Crayfish breeding in the structure of aquaculture in the Middle Volga region can become an important component. The development of aquabiotechnology makes it possible to use natural crayfish populations for the tasks of creating industrial crayfish farms.

Sign in / Sign up

Export Citation Format

Share Document