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Wyszukujesz frazę "Marenkov, Oleh" wg kryterium: Autor

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    Wyświetlanie 1-13 z 13
    Tytuł:
    Biotechnological bases of organization of industrial crayfish farm in Ukraine
    Autorzy:
    Marenkov, Oleh
    Powiązania:
    https://bibliotekanauki.pl/articles/1031670.pdf
    Data publikacji:
    2020
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    aquaculture
    biotechnology
    crayfish
    farming
    ponds
    Opis:
    Crayfish are valuable invertebrates that are constantly in great demand in all corners of the Earth. Breeding crayfish is not only large-scale production as it can also be arranged in small volumes using pools and installations of closed water supply. Cultivation of crayfish generates profit after a certain period of time, if all biotechnological norms of cultivation are considered. Cultivation of crayfish is a rather promising production, in which it is possible to obtain from 200 to 300% of stable profits during 3–4 years old. The article gives an overview of the technology of growing crayfish, taking into account the characteristics of farming in Ukraine. The basic biotechnological stages of the establishment and operation of the economy are determined, calculations of capital expenditures for the establishment of the economy are presented and the profitability of the project for the production of freshwater crayfish is determined. Cultivation of river crayfish makes it possible to obtain environmentally friendly products that can compete on the markets of Ukraine or EU countries. Also, this way of growing crayfish allows getting stocking material for release in natural reservoirs in order to restore the populations of river crayfish.
    Źródło:
    World News of Natural Sciences; 2020, 28; 1-12
    2543-5426
    Pojawia się w:
    World News of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Laboratory Manual on General and Special Ichthyology
    Autorzy:
    Marenkov, Oleh
    Powiązania:
    https://bibliotekanauki.pl/articles/1112680.pdf
    Data publikacji:
    2018
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    anatomy
    fins
    fish
    ichthyology
    morphology
    scales
    Opis:
    The manual presents the main methods for studying fish. The general features of the external structure of fish are described: the shape of the body, external organs, the structure and functions of the fins, the types of scales, and the structure of the lateral line. The indicators of morphometric studies of fish with the use of meristic and plastic features according to the classical schemes of measuring fish are also presented. A short description of the statistical method of comparative study of two data samples using the Student's test is given. A method for determining the age of fish by scales is described, as well as a methodology for calculating the annual growth of fish. General information on anatomical structure of fishes is also given. Furthermore, methods of studying the fertility of fish, as well as assessing the nutrition of fish, are described. Particular attention is paid to creating fish preparations: the production of the skeleton of fish, the design of fixed moist preparations and the preparation of a stuffed fish. The presented material has visual illustrations, accompanied by short biological information and forms of tabular material design. The proffered material will be useful for students of the biological and ecological profile, students of natural and agrarian faculties, post-graduate students and young scientists.
    Źródło:
    World News of Natural Sciences; 2018, 18, 1; 1-51
    2543-5426
    Pojawia się w:
    World News of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Organic permaculture: cultivation of Eisenia andrei earthworms for use as feed for aquatic organisms
    Autorzy:
    Selivanov, Yevhen
    Marenkov, Oleh
    Powiązania:
    https://bibliotekanauki.pl/articles/1031440.pdf
    Data publikacji:
    2021
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Eisenia andrei
    Eisenia fetida
    aquaculture
    feed
    vermiculture
    Opis:
    This paper examines the biological features and taxonomic status of the red wiggler worm Eisenia andrei as presented in the relevant literature. We evaluate the economic feasibility of cultivating this species as feed for aquaculture purposes and discuss conventional cultivation methods.
    Źródło:
    World Scientific News; 2021, 152; 39-54
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ways of optimization of breeding conditions of fish by using artificial spawning grounds
    Autorzy:
    Marenkov, Oleh
    Fedonenko, Olena
    Powiązania:
    https://bibliotekanauki.pl/articles/1182952.pdf
    Data publikacji:
    2016
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    fish
    spawning
    artificial spawning ground
    artificial reefs
    spawning nests
    Opis:
    The monograph presents ways of optimization of the reproduction of fish fauna due to the use of artificial spawning nests. There is classification of fish by nature, terms and conditions of the spawning course. Spawning nests divided according to the nature of fish spawning. There is given characteristic with describing and depicting of spawning grounds designs. It is indicated what species of fish and in what waters they can be used and also the efficiency and cost of their creation, use and maintenance. The book is intended for specialists in the field of ichthyology, ecology, hydrobiology, fisheries, public organizations activists, students and graduate students of higher educational institutions in "Biology" and "Water Biological resources".
    Źródło:
    World Scientific News; 2016, 49, 1; 1-58
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Histogenesis and morphological characteristics of hyaline cartilage of the pumpkinseed juveniles Lepomis gibbosus (Linnaeus, 1758) (Actinopterygii, Centrarchidae)
    Autorzy:
    Marenkov, Oleh
    Nesterenko, Oleh
    Powiązania:
    https://bibliotekanauki.pl/articles/1046547.pdf
    Data publikacji:
    2019
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Lepomis gibbosus
    chondroblasts
    chondrocytes
    fish
    histology
    hyaline cartilage
    pumpkinseed
    Opis:
    The article presents the structure feature of the hyaline cartilage of two-month-old fry of the pumpkinseed Lepomis gibbosus (Linnaeus, 1758). It is found that 4 cm long fry have cartilaginous skeleton, in which the bony tissue is replacing cartilage one. It is noted that the chondroblasts have a flattened or oval shape and reach a size of 77.10 ± 25.55 μm 2. Eventually, the growth of the cytoplasm of cells and the differentiation of chondroblasts into chondrocytes leads to the decrease in nuclear-cytoplasmic ratio from 0.159 to 0.086 units. The definitive chondrocytes reach a size of 142.82±14.78 μm2, which is almost twice as large as chondroblasts. However, the dimensions of the nuclei of cells of the cartilaginous tissue are not statistically different and range from 11.4 to 11.8 μm2. As the fish grows, the bony tissue gradually replaces cartilage tissue of the skeleton, involving chondroclasts. The study was carried out within the research scientific work "Assessment of the physiological, biochemical and cytological status of native and alien aquatic organisms under conditions of anthropogenic transformation of aquatic ecosystems" (state registration number 0117U006751).
    Źródło:
    World Scientific News; 2019, 138, 2; 277-284
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Estimation of physiological and biological indices and consequences of biological invasion of the pumpkinseed Lepomis gibbosus (Linnaeus, 1758) in the Zaporizke Reservoir, Ukraine
    Autorzy:
    Marenkov, Oleh
    Nesterenko, Oleh
    Powiązania:
    https://bibliotekanauki.pl/articles/1178038.pdf
    Data publikacji:
    2018
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Dnipro
    Lepomis gibbosus
    Zaporizke Reservoir
    biological invasion
    erythrocytes
    fish egg
    pumpkinseed
    Opis:
    Due to the emergence of new species in ichthyofauna of the Zaporizke reservoir, there was a need to study their biology, ecology and patterns of their distribution. Biological invasions of new species of fish can have diverse effects both within aboriginal populations and within the entire ecosystem. The pumpkinseed Lepomis gibbosus (Linnaeus, 1758) is one of the most common alien species in the Zaporizke reservoir, which has already adapted to the new environment and quickly develops the reservoirs of the region and increases its number. In addition, this species has a wide range of nutrients and can compete for feed resources with other species of fish. The purpose of the work: to study the biological and ecological parameters of the pumpkinseed, the basic laws of its physiology. The paper describes the results of fish morphological studies, estimation of the number and biomass of young fish, determines the morphometric parameters of peripheral blood, determines fertility indexes and features of the course of oogenesis. The paper presents preliminary results of the assessment of the consequences of the invasion of this species in the basin of the Zaporizke Reservoir.
    Źródło:
    World Scientific News; 2018, 95; 21-51
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The zoobenthos structure in the Dniprovske (Zaporizke) reservoir, Ukraine
    Autorzy:
    Petrovsky, Olexandr
    Fedonenko, Olena
    Marenkov, Oleh
    Powiązania:
    https://bibliotekanauki.pl/articles/1031526.pdf
    Data publikacji:
    2020
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Dniprovske reservoir
    species diversity
    zoobenthos
    Opis:
    The article presents data on monitoring the species composition of the zoobenthos of the Dnipro reservoir during 2015-2018. It has been found that a biocenosis of Dreissena (Dreissena bugensis, D polymorpha) was formed on the pass of the upper part of the reservoir on slightly silty sand. The bottom layers of water have been found to be slightly exposed to climatic factors due to slow flow; thus seasonal changes in zoobenthos in the profundal biotope are insignificant.
    Źródło:
    World News of Natural Sciences; 2020, 32; 87-98
    2543-5426
    Pojawia się w:
    World News of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Annotated histological atlas (normal histology)
    Autorzy:
    Marenkov, Oleh
    Fedonenko, Elena
    Ananieva, Tamila
    Tarnopolskaya, Daria
    Powiązania:
    https://bibliotekanauki.pl/articles/1178794.pdf
    Data publikacji:
    2017
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    blood
    bone
    cartilage
    connective tissue
    glandular epithelium
    muscle
    nervous tissue
    surface epithelium
    tissues of internal environment
    Opis:
    The Annotated Atlas contains original author’s microphotos of histological samples for the light microscopy analysis, those are necessary for study according to The Educational Standard of High School in Ukraine. Photos of preparations were made with the “Sciencelab T500 5.17 M” digital camera, which was connected to the “Biolam 70” microscope. All required histological specimens for obligatory program are represented and described. Publication materials can be used for efficient laboratory work and self-study. The Annotated Atlas is recommended to the students of Biology Faculties, who study Histology at the Universities.
    Źródło:
    World Scientific News; 2017, 90; 101-126
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Histology of marbled crayfish Procambarus virginalis (Lyko, 2017): annotated atlas
    Autorzy:
    Marenkov, Oleh
    Lykholat, Tetiana
    Kurchenko, Viktoriia
    Nesterenko, Oleh
    Powiązania:
    https://bibliotekanauki.pl/articles/1055261.pdf
    Data publikacji:
    2018
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Marmorkrebs
    Procambarus virginalis
    hemolymph
    hepatopancreas
    histology
    marbled crayfish
    Opis:
    The educational publication contains microphotographs and description of histological preparations of the structure of marbled crayfish. The above materials may be used both for carrying out laboratory work on disciplines "Histology", "Cytology", "Cell Biology", "Special Practice", and for self-study of relevant educational topics. Designed for specialists in the field of hydrobiology and histology, students and graduate students of institutions of higher education who studying in the field of "091 Biology", "207 Water bioresources and aquaculture" and "162 Biotechnology and bioengineering". The publication contains the results of studies conducted by President’s of Ukraine grant for competitive projects Ф75/142 «The reproductive potential of invasive species of Dnieper region reservoirs and their impact on bioproductivity formation» (№ 0118U006319) of the State Fund for Fundamental Research.
    Źródło:
    World News of Natural Sciences; 2018, 21; 141-153
    2543-5426
    Pojawia się w:
    World News of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Fishery and environmental situation assessment of water bodies in the Dnipropetrovsk region of Ukraine
    Autorzy:
    Fedonenko, Olena
    Yakovenko, Volodymyr
    Ananieva, Tamila
    Sharamok, Tetiana
    Yesipova, Natalia
    Marenkov, Oleh
    Powiązania:
    https://bibliotekanauki.pl/articles/1158130.pdf
    Data publikacji:
    2018
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Zaporizke Reservoir
    artificial spawning grounds
    epizootics
    fish biochemistry
    heavy metals
    hydrochemical regime
    ichthyofauna
    nutrition base
    small water bodies
    Opis:
    The monograph presents the results of a long-term research of water ponds biocenosis in the southeastern part of Ukraine. The Department of General Biology and Aquatic Bioresources at Oles Honchar Dnipro National University specialists carried out all the researches. The paper provides a detailed analysis of hydroecological situation in the large and small water bodies, which are used for fishery purposes. It is shown that in the water bodies of different types the total environmental problems are the pollution with organic substances, eutrophication, and anthropogenic pollution with heavy metal salts. Under conditions of increased anthropogenic pressure on water bodies, the biocenoses have gradually degraded. This is manifested in the disappearance of ecologically sensitive species of hydrobionts and the dominance of species with high adaptive abilities. An important problem of current water ecosystems is also the getting and mass distribution of spontaneous fish in fish pools, which actively compete with inhabitat species for the nutrition base and spawning grounds. Separate chapters of the monograph are devoted to physiological and biochemical indicators of industrial fish species, their health status and parasite infestation. In this work the practical recommendations have been given for increasing fish productivity in reservoirs and improving their ecological status at the southeastern Ukraine.
    Źródło:
    World Scientific News; 2018, 92, 1; 1-138
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Parameters of the histological adaptation of Marmorkrebs Procambarus fallax f. virginal (Decapoda, Cambaridae) to zinc and cadmium ions pollution
    Autorzy:
    Marenkov, Oleh
    Kovalchuk, Julia
    Shapovalenko, Zoya
    Naboka, Olexandra
    Nesterenko, Oleh
    Dzhobolda, Bogdan
    Powiązania:
    https://bibliotekanauki.pl/articles/1178807.pdf
    Data publikacji:
    2017
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    2010
    Procambarus fallax f. virginalis Martin et al.
    glandulocytes
    heavy metals
    hepatopancreas
    marbled crayfish
    Opis:
    Due to the fact that marbled crayfish (Marmorkrebs) got into the reservoirs of the Dnipropetrovsk region in 2015, it was necessary to study the possibilities of its adaptation to environmental factors of reservoirs for further prediction of its distribution or even acclimatization under conditions of toxicological contamination of the ponds of the steppe Prydniprovya. The article presents the results of studies on the influence of heavy metal ions on marbled crayfish. It was determined that zinc and cadmium ions affect weight indicators, survival and reproduction of experimental crayfish. Experimentally simulated concentrations of heavy metals on the example of zinc – 0.1 mg/l (10 MPC) and cadmium – 0.01 mg/l (2 MPC) allowed detecting the reaction of the excretory system of marbled crayfish. It is determined that under the influence of heavy metal ions the area of glandulocytes cells decreases by 10.4–14.8%. Also, there is a decrease in the cellular nucleus, thus, under the influence of zinc, the nucleus of the secretory cells was 23.6% smaller, and under the influence of cadmium by 17.5%. To study the influence of zinc and cadmium on the glandular cells of the green gland of marbled crayfish, the index of nuclear-cytoplasmic ratio (NCR) was used. The indicator of nuclear-cytoplasmic ratio allows estimating the level of metabolism and detecting the manifestation of compensatory reactions of the organism of experimental crayfish. The value of NCR in the experiment and control was not statistically different and ranged from 0.29 to 0.31 units. This indicates an interproportional reduction in both the cytoplasm of the cells of the green gland and their nuclei, caused by heavy metals exposure. The negative influence of heavy metals on the histostructure of hepatopancreas of marbled crayfish was determined; significant changes in the structure of tissue were noted, heavy metals influenced the shape of the hepatopancerase lobes and the size of the lumen. The worst histological picture of cells of experimental tissues and organs of marbled crayfish was observed in individuals exposed to cadmium ions due to the toxicological effects of this heavy metal. Investigation of the histological structure of tissues and organs of marbled crayfish will allow the development of measures for the determination of biomarkers for the bioindication of the aquatic environment using freshwater crayfish. The results of such studies have an important fundamental and applied significance for understanding the mechanisms of adaptation of crustaceans to the conditions of toxicological burden on aquatic ecosystems.
    Źródło:
    World Scientific News; 2017, 90; 189-202
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Basics of Aquaculture and Hydrobiotechnology
    Autorzy:
    Fedonenko, Olena
    Marenkov, Oleh
    Sharamok, Tetiana
    Kolesnik, Natalia
    Grygorenko, Tetiana
    Symon, Mariia
    Powiązania:
    https://bibliotekanauki.pl/articles/1178279.pdf
    Data publikacji:
    2017
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Californian red worm
    algae
    apple snails
    aquaculture
    freshwater prawn
    grape snail
    nematodes
    Opis:
    The manual sets out the necessary material concerning the cultivation of certain objects of aquaculture that can be used as feed additives. The manual is intended for practical work on aquaculture, as well as for independent work and self-study students. The material is designed for students of biological faculties of full-time and correspondence forms of training.
    Źródło:
    World Scientific News; 2017, 88, 1; 1-57
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Biological and biomechanical principles of the controlling molluscs Melanoides tuberculata (Müller 1774) and Tarebia granifera (Lamarck, 1822) in reservoirs of strategic importance
    Autorzy:
    Oleh, Marenkov
    Kyrylo, Batalov
    Olena, Kriachek
    Powiązania:
    https://bibliotekanauki.pl/articles/1177801.pdf
    Data publikacji:
    2018
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Clea helena
    Melanoides tuberculata
    Tarebia granifera
    Zaporizhia Nuclear Power Plant
    assassin snail
    biological invasion
    cooling pond
    red-rimmed melania
    thiarids
    Opis:
    The article presents the results of complex laboratory investigations on the biological and biomechanical ways of control of Melanoides tuberculata (Müller 1774) and Tarebia granifera (Lamarck, 1822) molluscs in simulated conditions close to the conditions of the cooling pond of the Zaporizhia Nuclear Power Plant. It was determined that molluscs have naturalized in the Zaporizhia Nuclear Power Plant cooling pond, quickly increased their number and created a threat to hydraulic structures. Taking into account biological features of Thiaridae mollusks and technical and ecological features of Zaporizhia NPP, we carried out a series of experiments using biological control measures (the use of predatory species of hydrobionts) and mechanical means for controlling mollusks. Representatives of different taxons of the Animalia Kingdom were selected as predatory species of hydrobionts, which potentially can consume gastropods: Mollusca, Crustaceans and Fish. It has been found experimentally that the use of marbled crayfish Procambarus virginalis (Lyko, 2017), pumpkinseed Lepomis gibbosus (Linnaeus, 1758) and Botia lohachata Chaudhuri, 1912 has not given positive results in the development of measures to control the number of molluscs. Positive results were obtained in a series of experiments with predatory mollusc assassin snail Clea helena (von dem Busch, 1847), but it was noted that in the presence of more accessible feeds, assassin snail Clea helena (von dem Busch, 1847) consumes smaller quantities of Thiaridae mollusks. The most successful results we obtained in experiments with traps for molluscs. We have developed experimental constructions of traps with lower and upper inlets that act as mollusk accumulator and can be installed in the coastal zone of the reservoir and Zaporizhia NPP cooling system channels for reducing the number of reproductive individuals of Melanoides tuberculata (Müller 1774) and Tarebia granifera (Lamarck, 1822). The most effective were the traps with the lower inlet to which the mollusks could get faster. In order to attract mollusks to traps, we have conducted studies on the use of feed baits for molluscs. Most effectively, molluscs fell into traps that contained lime feed, feedstock sunflower oil and anise oil. The most effective among mollusks was the bait with the addition of anise oil. During the exposure, traps with anise bait traps accumulated 14.1% of molluscs. The conducted researches can serve as the basis for the development of biomelioration measures aimed at reducing the negative impact of accidental introduction of new species of molluscs into technical reservoirs of strategic importance.
    Źródło:
    World Scientific News; 2018, 99; 71-83
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-13 z 13

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