V. Lytvynenko, D. Khrystenko, G. Kotovska, N. Kolesnik, M. Simón
Purpose.To analyze the array of special literature and summarize the information obtained on the features of the white bream (Blicca bjoerkna (Linnaeus, 1758)) and its commercial catch from the Kуiv reservoir. Consider the basic principles of its forecasting, based on the current ecological state of this reservoir, which is of strategic importance for Ukraine. Findings. An overview of modern scientific publications devoted to the peculiarities of the commercial catch of white bream from the Kуiv reservoir, its forecasting and the prospects for using this species in fisheries is presented. The literature data on the specifics of industrial fishing in the Kуiv reservoir are summarized based on the ecological characteristics of this reservoir. The main factors influencing the adaptation of white bream populations to their commercial exploitation are described. The general directions of the impact of anthropogenic pressure on them and their consequences are considered. The prospects of using white bream as an economically valuable species are shown under the condition of rational industrial fishing in the Kуiv reservoir. Practical Value. The review can be useful for scientists, applicants, students, government authorities and private entrepreneurs involved in the process of research and commercial harvesting of living aquatic resources in reservoirs, namely in Kуiv reservoir. Keywords: white bream (Blicca bjoerkna Linnaeus, 1758), Kуiv reservoir, industrial fishing, ichthyofauna.
{"title":"Features of catching white bream (Blicca bjoerkna (Linnaeus, 1758)) from Kуiv reservoir (a review)","authors":"V. Lytvynenko, D. Khrystenko, G. Kotovska, N. Kolesnik, M. Simón","doi":"10.15407/fsu2021.03.005","DOIUrl":"https://doi.org/10.15407/fsu2021.03.005","url":null,"abstract":"Purpose.To analyze the array of special literature and summarize the information obtained on the features of the white bream (Blicca bjoerkna (Linnaeus, 1758)) and its commercial catch from the Kуiv reservoir. Consider the basic principles of its forecasting, based on the current ecological state of this reservoir, which is of strategic importance for Ukraine. Findings. An overview of modern scientific publications devoted to the peculiarities of the commercial catch of white bream from the Kуiv reservoir, its forecasting and the prospects for using this species in fisheries is presented. The literature data on the specifics of industrial fishing in the Kуiv reservoir are summarized based on the ecological characteristics of this reservoir. The main factors influencing the adaptation of white bream populations to their commercial exploitation are described. The general directions of the impact of anthropogenic pressure on them and their consequences are considered. The prospects of using white bream as an economically valuable species are shown under the condition of rational industrial fishing in the Kуiv reservoir. Practical Value. The review can be useful for scientists, applicants, students, government authorities and private entrepreneurs involved in the process of research and commercial harvesting of living aquatic resources in reservoirs, namely in Kуiv reservoir. Keywords: white bream (Blicca bjoerkna Linnaeus, 1758), Kуiv reservoir, industrial fishing, ichthyofauna.","PeriodicalId":30821,"journal":{"name":"Ribogospodars''ka Nauka Ukraini","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67113783","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
V. Gurbyk, O. Striletsky, H. Kurinenko, V. Tkachuk, Yu. Chernik
Purpose. To evaluate the reproductive indicators and exterior characteristics of the breeding brood stock of the Galician carp group at the original farms, namely farms "Korop" and "Dzherelo", State Enterprise "Lviv Experimental Station". Methodology. The study was conducted according to generally accepted methods in fish farming and breeding using statistical processing and data analysis. The productive features of the Galician carp were improved by the method of mass selection and directional selection. The tasks of the selection were to obtain a breeding stock of the Galician group, which will ensure the production of offspring with high individual weight in the first year of life. Findings. The age of maturity in brood Galician carp was 3-4 years in males and 4-5 years in females. After pituitary stimulation in the conditions of industrial reproduction, a positive reaction of the brood fish was established, which exceeded 92%. When forming breeding stocks of Galician carp in the first year of life, the intensity of selection was 15%. Directional selection on the basis of average individual weight started on the second year of life. The intensity of selection of age-1+ Galician carp group was 50%, then this parameter exceeded 85%. Reproduction of the Galician carp group occurred in spawning ponds and in industrial conditions. Working fertility of females was 1256.0 ± 132.80 thousand eggs, relative fertility - 127.5 ± 5.52 thousand eggs/kg, which was quite high in comparison with the Ukrainian framed carp. During the reproduction of Galician carp in ponds, the yield of three-day-old larvae from one nest amounted to 241 thousand individuals. According to the obtained data, based on the exterior indicators, the Galician carp group is characterized by a high-backed physique and fleshy structure, which is preserved throughout life. In view of the conducted study, the Galician carp group fully complies with the requirements of the Regulation on approbation of selection achievements in animal husbandry and can be submitted to the relevant authorities for consideration and approval as an intrabreed type of Ukrainian framed and scaly carp breeds. Originality. The analysis of reproductive indicators of the breeding brood stock of Galician carp will serve as a basis for the presentation of this group in the status of intrabreed type and its approval as a selection achievement. Practical value. The obtained results will contribute to the expansion of the Galician carp group both in the aquaculture of Ukraine and abroad. Breeding brood material as an object of selection will be involved in work with framed carp mixes. Key words: breeding, carp, inventory, grading, crossbreeding, organization of spawning, reproduction.
{"title":"To the approval of the Galician carp group","authors":"V. Gurbyk, O. Striletsky, H. Kurinenko, V. Tkachuk, Yu. Chernik","doi":"10.15407/fsu2021.03.048","DOIUrl":"https://doi.org/10.15407/fsu2021.03.048","url":null,"abstract":"Purpose. To evaluate the reproductive indicators and exterior characteristics of the breeding brood stock of the Galician carp group at the original farms, namely farms \"Korop\" and \"Dzherelo\", State Enterprise \"Lviv Experimental Station\". Methodology. The study was conducted according to generally accepted methods in fish farming and breeding using statistical processing and data analysis. The productive features of the Galician carp were improved by the method of mass selection and directional selection. The tasks of the selection were to obtain a breeding stock of the Galician group, which will ensure the production of offspring with high individual weight in the first year of life. Findings. The age of maturity in brood Galician carp was 3-4 years in males and 4-5 years in females. After pituitary stimulation in the conditions of industrial reproduction, a positive reaction of the brood fish was established, which exceeded 92%. When forming breeding stocks of Galician carp in the first year of life, the intensity of selection was 15%. Directional selection on the basis of average individual weight started on the second year of life. The intensity of selection of age-1+ Galician carp group was 50%, then this parameter exceeded 85%. Reproduction of the Galician carp group occurred in spawning ponds and in industrial conditions. Working fertility of females was 1256.0 ± 132.80 thousand eggs, relative fertility - 127.5 ± 5.52 thousand eggs/kg, which was quite high in comparison with the Ukrainian framed carp. During the reproduction of Galician carp in ponds, the yield of three-day-old larvae from one nest amounted to 241 thousand individuals. According to the obtained data, based on the exterior indicators, the Galician carp group is characterized by a high-backed physique and fleshy structure, which is preserved throughout life. In view of the conducted study, the Galician carp group fully complies with the requirements of the Regulation on approbation of selection achievements in animal husbandry and can be submitted to the relevant authorities for consideration and approval as an intrabreed type of Ukrainian framed and scaly carp breeds. Originality. The analysis of reproductive indicators of the breeding brood stock of Galician carp will serve as a basis for the presentation of this group in the status of intrabreed type and its approval as a selection achievement. Practical value. The obtained results will contribute to the expansion of the Galician carp group both in the aquaculture of Ukraine and abroad. Breeding brood material as an object of selection will be involved in work with framed carp mixes. Key words: breeding, carp, inventory, grading, crossbreeding, organization of spawning, reproduction.","PeriodicalId":30821,"journal":{"name":"Ribogospodars''ka Nauka Ukraini","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67113514","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
О. Deren, N. Syrovatka, M. Koryliak, О. Dobryanska
Purpose. The aim of the work was to study certain morpho-physiological parameters of carp as a result of additional introduction of a mycotoxin sorbent to a feed with signs of spoilage. Methodology. During 2019–2020, two experiments were conducted in the laboratory. The first one included 7 groups-analogues of age-1+ Nyvky carp, 20 fish in each group, with an average weight of 22.5 g. The control group of fish was fed for 24 days with a compound feed with signs of spoilage, «Mykosorb» was additionally added to the diet of the experimental groups in the amounts of 0.05, 0.1; 0.15; 0.2; 0.25 and 0.4%, respectively. The second group included 4 groups of age-1+ fish, 12 fish in each group, with an average weight of 20.0 g. The diet of the control group was identical to that of the first experiment, and the experimental groups with the addition of 0.05, 0.075 and 0.1% of «Mycosorb», respectively. During the study, optimal conditions for keeping fish were provided. Fish after were measured and weighed at the end of the experiment and their weight gains were analyzed according to generally accepted methods in fish farming. The activity of antioxidant enzymes and the content of lipid peroxidation products depending on the composition of the diet were studied. Findings. The studies used compound feed with signs of spoilage as a result of violation of their storage technology, which identified three groups of toxins: Aflatoxin B1, Zearalenone and Deoxynivalenol. As a result of the first stage of the study, the rates of application of mycotoxin sorbent into the diet of carp at amounts of 0.05 - 0.2% were determined. At the same time, there was no clear proportional pattern of changes in the average weight of fish depending on the amount of introduction of «Mycosorb», the value increased in all experimental groups compared to the control by 0.4 – 15.2%. Muscles of age-1+ fish were found to have higher (p<0,001) catalase activity after application of 0.15% of the test drug by 1.4 times, 0.2% — by 46%, 0.25% — by 69 and 0.4% — by 79%. Superoxide dismutase activity also increased, except for the groups of 0.2, 0.25 and 0.4% of «Mycosorb». There was a tendency of 21.0 and 22.6% decrease in the content of diene conjugates as a result of feeding 0.05 and 0.1% sorbent and some increase as a result of feeding 0.15; 0.2; 0.25 and 0.4% additives. Studies of the next stage showed that addition of «Mykosorb» at the rate of 0.05, 0.075 and 0.1% to the feed, the average weight of age-1+ carp in the experimental groups increased by 45.4; 37.2 and 30.3%, the condition factor — by 41.9; 40.8 and 42.7%, the relative growth rate is 4.3; 5.9 and 4.6 times, respectively. The fish body height to length ratio was lower by 10.3, 7.0 and 7.4% relative to the control group. Addition of 0.05, 0.075 and 0.1% of «Mycosorb» increased resistance of fish due to an increase in the hepatopancreatic activity of antioxidant enzymes: superoxide dismutase by 28.3, 30.5 and 5.0% and catalase by 5
{"title":"Results of the use of a sorbent in a carp feed with signs of mycotoxin contamination","authors":"О. Deren, N. Syrovatka, M. Koryliak, О. Dobryanska","doi":"10.15407/fsu2021.03.072","DOIUrl":"https://doi.org/10.15407/fsu2021.03.072","url":null,"abstract":"Purpose. The aim of the work was to study certain morpho-physiological parameters of carp as a result of additional introduction of a mycotoxin sorbent to a feed with signs of spoilage. Methodology. During 2019–2020, two experiments were conducted in the laboratory. The first one included 7 groups-analogues of age-1+ Nyvky carp, 20 fish in each group, with an average weight of 22.5 g. The control group of fish was fed for 24 days with a compound feed with signs of spoilage, «Mykosorb» was additionally added to the diet of the experimental groups in the amounts of 0.05, 0.1; 0.15; 0.2; 0.25 and 0.4%, respectively. The second group included 4 groups of age-1+ fish, 12 fish in each group, with an average weight of 20.0 g. The diet of the control group was identical to that of the first experiment, and the experimental groups with the addition of 0.05, 0.075 and 0.1% of «Mycosorb», respectively. During the study, optimal conditions for keeping fish were provided. Fish after were measured and weighed at the end of the experiment and their weight gains were analyzed according to generally accepted methods in fish farming. The activity of antioxidant enzymes and the content of lipid peroxidation products depending on the composition of the diet were studied. Findings. The studies used compound feed with signs of spoilage as a result of violation of their storage technology, which identified three groups of toxins: Aflatoxin B1, Zearalenone and Deoxynivalenol. As a result of the first stage of the study, the rates of application of mycotoxin sorbent into the diet of carp at amounts of 0.05 - 0.2% were determined. At the same time, there was no clear proportional pattern of changes in the average weight of fish depending on the amount of introduction of «Mycosorb», the value increased in all experimental groups compared to the control by 0.4 – 15.2%. Muscles of age-1+ fish were found to have higher (p<0,001) catalase activity after application of 0.15% of the test drug by 1.4 times, 0.2% — by 46%, 0.25% — by 69 and 0.4% — by 79%. Superoxide dismutase activity also increased, except for the groups of 0.2, 0.25 and 0.4% of «Mycosorb». There was a tendency of 21.0 and 22.6% decrease in the content of diene conjugates as a result of feeding 0.05 and 0.1% sorbent and some increase as a result of feeding 0.15; 0.2; 0.25 and 0.4% additives. Studies of the next stage showed that addition of «Mykosorb» at the rate of 0.05, 0.075 and 0.1% to the feed, the average weight of age-1+ carp in the experimental groups increased by 45.4; 37.2 and 30.3%, the condition factor — by 41.9; 40.8 and 42.7%, the relative growth rate is 4.3; 5.9 and 4.6 times, respectively. The fish body height to length ratio was lower by 10.3, 7.0 and 7.4% relative to the control group. Addition of 0.05, 0.075 and 0.1% of «Mycosorb» increased resistance of fish due to an increase in the hepatopancreatic activity of antioxidant enzymes: superoxide dismutase by 28.3, 30.5 and 5.0% and catalase by 5","PeriodicalId":30821,"journal":{"name":"Ribogospodars''ka Nauka Ukraini","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67113605","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
A. Vashchenko, N. Matvienko, I. Kravchenko, A. Mruk
Purpose: To analyze the specialized literature and summarize the information on the main parasitic diseases of whitefish. Findings: Whitefish are members of the Salmoniformes, which are currently represented by 3 subgroups (Salmonidae, Coregonidae, Thymallidae). Whitefishes are widespread species of fish in the subarctic and boreal zones of Europe, Asia and North America and are the most important components of the ecological system and valuable objects of local and industrial fishery. But these fishes are frequently affected by parasitic diseases. This article contains the description of most common parasitic diseases of whitefish and of the main causative agent, clinical signs of diseases, and the main preventive measures to prevent the occurrence of these diseases in whitefish culture. Aquaculture of whitefish creates a competitive food production for one or two fattening seasons with their delicacy gastronomic benefits and high economic profitability. Products of whitefish are popular on external markets that is also a good motivation for improvement of the biotechnological development for various methods of cultivation of these valuable fish. However, with increasing amounts of production, transporting fish from one farm to another and crowded stocks of fish result in problems with diseases of different etiology. The above material describes main parasitic diseases that occur in whitefish including their main symptoms, which will help to identify them in time. Practical value. Information on the main parasitic diseases of whitefish was systematized. Most of the parasitic diseases known to the whitefish are ectoparasitosis. These are ichthyobodosis (costosis), trichodinosis, chylodonelosis, ichthioftirioz, trichophthirioz and cruciformis. Proteocephalosis, acanthocephalosis, diplomystomosis are the most dangerous among helminths. The short characteristic of these diseases is described and the methods of prophylaxis of these diseases are suggested. The review can be useful both for scientists dealing with the problem of whitefish acclimatization on the territory of Ukraine and for fish breeders already engaged in the whitefish aquaculture in Ukraine and abroad. Descriptions of symptoms of diseases will be useful for preliminary diagnostics of diseases. Key words: whitefish, parasites, ectoparasites, helminthes, diseases, ichthyobodosis, trichodionosis, chylodonelosis, ichthioftirioz, trichophriosis, chloromycosis, ergazilosis, lerneosis, argulosis, roteocephalosis, mechinorinchosis, diplostomosis.
{"title":"Parasitic diseases of whitefish (Coregoninae) (a review)","authors":"A. Vashchenko, N. Matvienko, I. Kravchenko, A. Mruk","doi":"10.15407/fsu2021.03.087","DOIUrl":"https://doi.org/10.15407/fsu2021.03.087","url":null,"abstract":"Purpose: To analyze the specialized literature and summarize the information on the main parasitic diseases of whitefish. Findings: Whitefish are members of the Salmoniformes, which are currently represented by 3 subgroups (Salmonidae, Coregonidae, Thymallidae). Whitefishes are widespread species of fish in the subarctic and boreal zones of Europe, Asia and North America and are the most important components of the ecological system and valuable objects of local and industrial fishery. But these fishes are frequently affected by parasitic diseases. This article contains the description of most common parasitic diseases of whitefish and of the main causative agent, clinical signs of diseases, and the main preventive measures to prevent the occurrence of these diseases in whitefish culture. Aquaculture of whitefish creates a competitive food production for one or two fattening seasons with their delicacy gastronomic benefits and high economic profitability. Products of whitefish are popular on external markets that is also a good motivation for improvement of the biotechnological development for various methods of cultivation of these valuable fish. However, with increasing amounts of production, transporting fish from one farm to another and crowded stocks of fish result in problems with diseases of different etiology. The above material describes main parasitic diseases that occur in whitefish including their main symptoms, which will help to identify them in time. Practical value. Information on the main parasitic diseases of whitefish was systematized. Most of the parasitic diseases known to the whitefish are ectoparasitosis. These are ichthyobodosis (costosis), trichodinosis, chylodonelosis, ichthioftirioz, trichophthirioz and cruciformis. Proteocephalosis, acanthocephalosis, diplomystomosis are the most dangerous among helminths. The short characteristic of these diseases is described and the methods of prophylaxis of these diseases are suggested. The review can be useful both for scientists dealing with the problem of whitefish acclimatization on the territory of Ukraine and for fish breeders already engaged in the whitefish aquaculture in Ukraine and abroad. Descriptions of symptoms of diseases will be useful for preliminary diagnostics of diseases. Key words: whitefish, parasites, ectoparasites, helminthes, diseases, ichthyobodosis, trichodionosis, chylodonelosis, ichthioftirioz, trichophriosis, chloromycosis, ergazilosis, lerneosis, argulosis, roteocephalosis, mechinorinchosis, diplostomosis.","PeriodicalId":30821,"journal":{"name":"Ribogospodars''ka Nauka Ukraini","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67113638","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
T. Hryhorenko, N. Savenko, N. Chuzhma, A. Bazaieva
Purpose. Investigate ecological conditions and determine fish productivity of ponds when growing young-of-the-year carp using a suspension of chlorella. Methodology. During the study, we used methods generally accepted in hydrochemistry, hydrobiology and fish farming. Findings. The article presents the results of the study on the use of chlorella suspension in the cultivation of carp. It was found that the use of chlorella suspension created favorable hydrochemical conditions resulting in intensive development of zooplankton, which had a positive effect on the growth of young-of-the-year carp and fish productivity of the pond. The development of the natural food supply was sufficient to meet the nutritional needs of juvenile carp. The average seasonal biomass of zooplankton in the experimental pond was 28.68 g/m3 that was 1.5 times higher than in the control. The share of cladocerans in the total biomass of zooplankton in the experimental pond was 76.6%, versus 36.8% in the control. The average biomass of zoobenthos for the growing season in the experimental was 1.3 times higher than in the control, and was formed by chironomid larvae, which are valuable in the food chain. Originality. The study investigated ecological conditions and fish productivity of growing ponds under conditions of the application of cattle manure and suspension of chlorella when growing carp in monoculture. Practical value. It was found that the use of chlorella suspension promotes the intensification of the development of zooplankton organisms in ponds. The obtained data can be used to develop practical recommendations for optimizing the conditions for growing carp seeds and increasing the biological productivity of ponds. Key words: nursery ponds, natural food supply, phytoplankton, zooplankton, zoobenthos, young-of-the-year carp, chlorella suspension, fish productivity.
{"title":"Cultivation of young-of-the-year carp with the use of chlorella (Chlorella (Beijerinck, 1890)) suspension","authors":"T. Hryhorenko, N. Savenko, N. Chuzhma, A. Bazaieva","doi":"10.15407/fsu2021.03.033","DOIUrl":"https://doi.org/10.15407/fsu2021.03.033","url":null,"abstract":"Purpose. Investigate ecological conditions and determine fish productivity of ponds when growing young-of-the-year carp using a suspension of chlorella. Methodology. During the study, we used methods generally accepted in hydrochemistry, hydrobiology and fish farming. Findings. The article presents the results of the study on the use of chlorella suspension in the cultivation of carp. It was found that the use of chlorella suspension created favorable hydrochemical conditions resulting in intensive development of zooplankton, which had a positive effect on the growth of young-of-the-year carp and fish productivity of the pond. The development of the natural food supply was sufficient to meet the nutritional needs of juvenile carp. The average seasonal biomass of zooplankton in the experimental pond was 28.68 g/m3 that was 1.5 times higher than in the control. The share of cladocerans in the total biomass of zooplankton in the experimental pond was 76.6%, versus 36.8% in the control. The average biomass of zoobenthos for the growing season in the experimental was 1.3 times higher than in the control, and was formed by chironomid larvae, which are valuable in the food chain. Originality. The study investigated ecological conditions and fish productivity of growing ponds under conditions of the application of cattle manure and suspension of chlorella when growing carp in monoculture. Practical value. It was found that the use of chlorella suspension promotes the intensification of the development of zooplankton organisms in ponds. The obtained data can be used to develop practical recommendations for optimizing the conditions for growing carp seeds and increasing the biological productivity of ponds. Key words: nursery ponds, natural food supply, phytoplankton, zooplankton, zoobenthos, young-of-the-year carp, chlorella suspension, fish productivity.","PeriodicalId":30821,"journal":{"name":"Ribogospodars''ka Nauka Ukraini","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67113908","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Purpose. To estimate the parameters of infestation of Helix aspersa by nematodes, experimentally identify the optimal concentration of anti-helminthic drugs and assess their effectiveness. Methodology. The experimental work on the development of therapeutic measures against nematodes of Helix aspersa (Müller) lasted for 15 days. The results of the experiments were evaluated by the following indicators: extensiveness and intensity of parasite infestation; survival of mollusks,%. Feeding activity was assessed by the relative amount of feed the mollusks ate per day. At the beginning of the experiments, histological examinations of mollusk tissues were performed. Selected samples were preserved in 4% formalin solution and then histological sections were made, which were than frozen with subsequent staining with hematoxylin-eosin. Histological analysis was performed using a light microscope at 8x and 40x magnification and a Sciencelab T500 5.17 M photographic digital camera. Assessment of changes in the histostructure was performed visually and using morformetric analysis on mollusk intestine samples. Two variants of the experiment with albendanzole (variant № 2 and 3) and control were evaluated. Findings. According to the results of the experiments, the best indicators of the anthelmintic effect and survival of snails were obtained using albendazole added to compound feed at a concentration of 0.02% of the live weight of mollusks. At this concentration, complete destruction of mature individuals of Alloionema appendiculatum was noted, as well as a decrease in the infection of snails with helminth eggs from 100% to 10%. The study of the histostructure of tissues and organs of mollusks showed that the use of albendazole at concentrations of 0.01% and 0.02% did not cause noticeable pathological changes in the muscles and brain of mollusks. However, certain structural abnormalities were observed in the cells of the intestinal and liver epithelium, which were detected as vacuolization of the cytoplasm, destruction of cell membranes, lysis and pycnosis of nuclei. The relative number of such cells with the pathology was about 10-15% when using 0.01% albendazole, and increased to 30-50% when using albendazole at a concentration of 0.02% of the live weight of snails. No noticeable anthelmintic effect was found when using trematozole. Scientific novelty. For the first time, the therapeutic effect and the optimal scheme of deworming of mollusks Helix aspersa infected with the parasitic nematode Alloionema appendiculatum were determined experimentally. Practical significance. The obtained results are of interest to enterprises engaged in snail farming. Key words: mollusk Helix aspersa Muller, nematodosis, extensiveness and intensity of invasion, anthelmintic drugs, morpho-histological parameters.
{"title":"Use of an anthelmintic to control parasitic nematodes of Helix aspersa (Müller)","authors":"N. Shmyhol, N. Yesipova, T. Sharamok","doi":"10.15407/fsu2021.03.107","DOIUrl":"https://doi.org/10.15407/fsu2021.03.107","url":null,"abstract":"Purpose. To estimate the parameters of infestation of Helix aspersa by nematodes, experimentally identify the optimal concentration of anti-helminthic drugs and assess their effectiveness. Methodology. The experimental work on the development of therapeutic measures against nematodes of Helix aspersa (Müller) lasted for 15 days. The results of the experiments were evaluated by the following indicators: extensiveness and intensity of parasite infestation; survival of mollusks,%. Feeding activity was assessed by the relative amount of feed the mollusks ate per day. At the beginning of the experiments, histological examinations of mollusk tissues were performed. Selected samples were preserved in 4% formalin solution and then histological sections were made, which were than frozen with subsequent staining with hematoxylin-eosin. Histological analysis was performed using a light microscope at 8x and 40x magnification and a Sciencelab T500 5.17 M photographic digital camera. Assessment of changes in the histostructure was performed visually and using morformetric analysis on mollusk intestine samples. Two variants of the experiment with albendanzole (variant № 2 and 3) and control were evaluated. Findings. According to the results of the experiments, the best indicators of the anthelmintic effect and survival of snails were obtained using albendazole added to compound feed at a concentration of 0.02% of the live weight of mollusks. At this concentration, complete destruction of mature individuals of Alloionema appendiculatum was noted, as well as a decrease in the infection of snails with helminth eggs from 100% to 10%. The study of the histostructure of tissues and organs of mollusks showed that the use of albendazole at concentrations of 0.01% and 0.02% did not cause noticeable pathological changes in the muscles and brain of mollusks. However, certain structural abnormalities were observed in the cells of the intestinal and liver epithelium, which were detected as vacuolization of the cytoplasm, destruction of cell membranes, lysis and pycnosis of nuclei. The relative number of such cells with the pathology was about 10-15% when using 0.01% albendazole, and increased to 30-50% when using albendazole at a concentration of 0.02% of the live weight of snails. No noticeable anthelmintic effect was found when using trematozole. Scientific novelty. For the first time, the therapeutic effect and the optimal scheme of deworming of mollusks Helix aspersa infected with the parasitic nematode Alloionema appendiculatum were determined experimentally. Practical significance. The obtained results are of interest to enterprises engaged in snail farming. Key words: mollusk Helix aspersa Muller, nematodosis, extensiveness and intensity of invasion, anthelmintic drugs, morpho-histological parameters.","PeriodicalId":30821,"journal":{"name":"Ribogospodars''ka Nauka Ukraini","volume":"114 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67113653","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Purpose. Development of a method for the regeneration of highly porous fillers for biofilters after slagging of their pores with biofilm residues in the process of growing aquaculture objects in recirculating aquaculture systems (RAS). Methodology. Regeneration of fillers was performed with solutions of sodium hypochlorite of different concentrations (2.5%, 1%, 0.5% of active chlorine) after their exploitation for 6 months. The cleaning efficiency was monitored by the difference in fillers weights after cleaning. Findings. According to the study, the use of sodium hypochlorite for cleaning highly porous fillers for biofilters (using an example of porous ceramic filler and foamed glass «JBL Micromec») is efficient and cost-effective. A reduction in the weight of the test samples averaged 12.95% for porous ceramics and 15.01% for foamed glass. Based on the obtained data, aqueous solutions with different concentrations of sodium hypochlorite do not have a pronounced difference in efficiency, respectively; the optimal for use is a 0.5% solution. Originality. The use of highly porous fillers for biofilters has long been unprofitable in fish farming due to the rapid loss of their main advantages - a high specific area per unit volume as a result of micropore slagging with biofilm residues. As a result, complete regeneration of these filter materials was required annually, which, given the significantly higher cost compared to polymeric fillers, made their use unprofitable. The described technique allows the use of porous ceramics and foamed glass, after their restoration, for a long time, with replacement only after mechanical wear. Practical value. The described method allows using highly porous fillers for biofilters in the process of growing aquaculture objects without their main disadvantage - a rapid decrease in efficiency as a result of pore slagging with biofilm residues. Keywords: RAS, biofilter, filler, restoration, sodium hypochlorite.
{"title":"Sodium hypochlorite pecularities in application for restoration of highly porous fillers after their use in biofiltration systems of recirculating aquaculture systems","authors":"D. Sharylo, V. Kovalenko, B. Kovalenko","doi":"10.15407/fsu2021.03.023","DOIUrl":"https://doi.org/10.15407/fsu2021.03.023","url":null,"abstract":"Purpose. Development of a method for the regeneration of highly porous fillers for biofilters after slagging of their pores with biofilm residues in the process of growing aquaculture objects in recirculating aquaculture systems (RAS). Methodology. Regeneration of fillers was performed with solutions of sodium hypochlorite of different concentrations (2.5%, 1%, 0.5% of active chlorine) after their exploitation for 6 months. The cleaning efficiency was monitored by the difference in fillers weights after cleaning. Findings. According to the study, the use of sodium hypochlorite for cleaning highly porous fillers for biofilters (using an example of porous ceramic filler and foamed glass «JBL Micromec») is efficient and cost-effective. A reduction in the weight of the test samples averaged 12.95% for porous ceramics and 15.01% for foamed glass. Based on the obtained data, aqueous solutions with different concentrations of sodium hypochlorite do not have a pronounced difference in efficiency, respectively; the optimal for use is a 0.5% solution. Originality. The use of highly porous fillers for biofilters has long been unprofitable in fish farming due to the rapid loss of their main advantages - a high specific area per unit volume as a result of micropore slagging with biofilm residues. As a result, complete regeneration of these filter materials was required annually, which, given the significantly higher cost compared to polymeric fillers, made their use unprofitable. The described technique allows the use of porous ceramics and foamed glass, after their restoration, for a long time, with replacement only after mechanical wear. Practical value. The described method allows using highly porous fillers for biofilters in the process of growing aquaculture objects without their main disadvantage - a rapid decrease in efficiency as a result of pore slagging with biofilm residues. Keywords: RAS, biofilter, filler, restoration, sodium hypochlorite.","PeriodicalId":30821,"journal":{"name":"Ribogospodars''ka Nauka Ukraini","volume":"1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2021-09-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67113901","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
O. Dobryanska, O. Deren, M. Korilyak, A. Tuchapska
Purpose. The aim of the work was to assess the effectiveness and feasibility of using the prebiotic "Actigen" in the process of commercial cultivation of carp taking into account productive and economic indicators. Methodology. The study was conducted in 2019, using three ponds, two of which were experimental and one control, which were stocked with age-1 scaly carp with an average weight of 55 - 56 g at a stocking density of 1000 specimens/ha. Carp of the experimental groups were fed during 90 days of the growing season with a feed with supplemented with the prebiotic "Actigen" at the amount of 0.025% (Experiment 1) and 0.05% (Experiment 2). Optimal conditions for carp keeping were provided during the study with the control of oxygen, temperature, hydro-chemical and hydro-biological regimes of the aquatic environment and analysis of the efficiency of cultivation at the end of the growing season according to generally accepted methods in aquaculture. Piscicultural and economic indicators of age-1+ carp cultivation were determined at the end of the growing season. Findings. Conditions for growing carp in experimental and control ponds were satisfactory. No dependence of the hydro-chemical regime of experimental ponds on the composition of the diet was found. The average seasonal biomass of food organisms of zooplankton and zoobenthos during the growing season was 10.81 – 20.64 g/m3 and 0.47 – 0.73 g/m2, respectively, and served as an additional source of food for carp. It was found that the average weight of age-1+ carp, which was fed with the feed with the addition of 0.025% and 0.05% of prebiotic supplements, was higher by 11.9% and 22.2%, respectively, fish productivity – by 12.1% and 23.1%. The feed conversion rate was lower by 9.5% and 19.1% relative to the control. The cost of additionally obtained fish products when fish were fed with a feed supplemented with the prebiotic at the amount of 0.025% was 4290 UAH/ha, 0.05% - 8190 UAH/ ha. The contingent income, including costs for feeds and fish seeds using 0.025% and 0.05% prebiotic, was 20.9% and 33.6% higher, respectively, than in the control group. Originality. The effect of prebiotic "Actigen" on productivity and economic indicators in the process of growing age-1+ carp was studied for the first time. The implementation of this task provided an opportunity to increase the fish productivity of ponds by feeding fish with an artificial feed of improved composition. Practical value. The obtained results testify to the expediency and efficiency of using prebiotic "Actigen" in fish farming. Reducing the cost and obtaining additional gains in the cultivation of fish products is provided by improving the quality characteristics of feed. Key words: carp, prebiotic, "Actigen", hydro-chemical and hydro-biological parameters, fish productivity, feed conversion factor, efficiency, profit.
{"title":"Productivity and efficiency of growing age-1+ carp (Cyprinus carpio (Linnaeus, 1758)) with the use of a prebiotic additive in the feed composition","authors":"O. Dobryanska, O. Deren, M. Korilyak, A. Tuchapska","doi":"10.15407/FSU2021.01.080","DOIUrl":"https://doi.org/10.15407/FSU2021.01.080","url":null,"abstract":"Purpose. The aim of the work was to assess the effectiveness and feasibility of using the prebiotic \"Actigen\" in the process of commercial cultivation of carp taking into account productive and economic indicators. Methodology. The study was conducted in 2019, using three ponds, two of which were experimental and one control, which were stocked with age-1 scaly carp with an average weight of 55 - 56 g at a stocking density of 1000 specimens/ha. Carp of the experimental groups were fed during 90 days of the growing season with a feed with supplemented with the prebiotic \"Actigen\" at the amount of 0.025% (Experiment 1) and 0.05% (Experiment 2). Optimal conditions for carp keeping were provided during the study with the control of oxygen, temperature, hydro-chemical and hydro-biological regimes of the aquatic environment and analysis of the efficiency of cultivation at the end of the growing season according to generally accepted methods in aquaculture. Piscicultural and economic indicators of age-1+ carp cultivation were determined at the end of the growing season. Findings. Conditions for growing carp in experimental and control ponds were satisfactory. No dependence of the hydro-chemical regime of experimental ponds on the composition of the diet was found. The average seasonal biomass of food organisms of zooplankton and zoobenthos during the growing season was 10.81 – 20.64 g/m3 and 0.47 – 0.73 g/m2, respectively, and served as an additional source of food for carp. It was found that the average weight of age-1+ carp, which was fed with the feed with the addition of 0.025% and 0.05% of prebiotic supplements, was higher by 11.9% and 22.2%, respectively, fish productivity – by 12.1% and 23.1%. The feed conversion rate was lower by 9.5% and 19.1% relative to the control. The cost of additionally obtained fish products when fish were fed with a feed supplemented with the prebiotic at the amount of 0.025% was 4290 UAH/ha, 0.05% - 8190 UAH/ ha. The contingent income, including costs for feeds and fish seeds using 0.025% and 0.05% prebiotic, was 20.9% and 33.6% higher, respectively, than in the control group. Originality. The effect of prebiotic \"Actigen\" on productivity and economic indicators in the process of growing age-1+ carp was studied for the first time. The implementation of this task provided an opportunity to increase the fish productivity of ponds by feeding fish with an artificial feed of improved composition. Practical value. The obtained results testify to the expediency and efficiency of using prebiotic \"Actigen\" in fish farming. Reducing the cost and obtaining additional gains in the cultivation of fish products is provided by improving the quality characteristics of feed. Key words: carp, prebiotic, \"Actigen\", hydro-chemical and hydro-biological parameters, fish productivity, feed conversion factor, efficiency, profit.","PeriodicalId":30821,"journal":{"name":"Ribogospodars''ka Nauka Ukraini","volume":"1 1","pages":"80-93"},"PeriodicalIF":0.0,"publicationDate":"2021-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"67113693","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Purpose. To provide a comparative analysis of fisheries and biological parameters of young-of-the-year wild carp-domestic carp hybrids obtained from males of different genetic origin by natural spawning method, with subsequent use in industrial hybridization. Methodology. Cultivation was carried out in pond conditions of the Lviv Research Station of the Institute of Fisheries of NAAS. Material for the study were young-of-the-year wild carp-domestic carp hybrids obtained from age-8 and 9 males of Amur wild carp of different genesis. Stocking density of 4-day larvae in nursery ponds was 20 thousand ind./ha. Growth rate was evaluated by using absolute, relative, daily and specific growth rate according to I.I. Schmalhausen. Feeding of fish was carried out with ground grain, starting from the first decade of July. Statistical processing of the material was performed in Microsoft Excel 2016. Criteria for the analysis of parameters were their average value and arithmetic mean error (M ± m). Findings. According to performed studies, young-of-the-year wild carp-domestic carp hybrids obtained from Amur wild carp males of different genesis in terms of dynamics of weight accumulation and linear growth, survival, fish productivity, hybrids obtained from cryo-males were not inferior to young-of-the-year wild carp-domestic carp obtained from local males. However, according to the main body-build indices, they had similar values but were slightly inferior. Originality. For the first time in Ukraine, a comparative analysis of fisheries and biological parameters of young-of-the-year wild carp-domestic carp hybrids obtained from males of different genetic origin in terms of industrial hybridization was performed. Practical value. The results of this work will provide a comprehensive assessment of fish and biological parameters of young-of-the-year wild carp-domestic carp hybrids obtained from Amur wild carp males of different genetic origin and justify their use in breeding work for further reproduction in breeding farms and to obtain industrial hybrids. Key words: Amur wild carp, genesis, body weight, body length, fatness, fish productivity.
{"title":"Fisheries-biological evaluation of young-of-the-year wild carp-domestic carp hybrid of different genesis","authors":"U. Kuts, H. Kurinenko","doi":"10.15407/FSU2021.01.066","DOIUrl":"https://doi.org/10.15407/FSU2021.01.066","url":null,"abstract":"Purpose. To provide a comparative analysis of fisheries and biological parameters of young-of-the-year wild carp-domestic carp hybrids obtained from males of different genetic origin by natural spawning method, with subsequent use in industrial hybridization. Methodology. Cultivation was carried out in pond conditions of the Lviv Research Station of the Institute of Fisheries of NAAS. Material for the study were young-of-the-year wild carp-domestic carp hybrids obtained from age-8 and 9 males of Amur wild carp of different genesis. Stocking density of 4-day larvae in nursery ponds was 20 thousand ind./ha. Growth rate was evaluated by using absolute, relative, daily and specific growth rate according to I.I. Schmalhausen. Feeding of fish was carried out with ground grain, starting from the first decade of July. Statistical processing of the material was performed in Microsoft Excel 2016. Criteria for the analysis of parameters were their average value and arithmetic mean error (M ± m). Findings. According to performed studies, young-of-the-year wild carp-domestic carp hybrids obtained from Amur wild carp males of different genesis in terms of dynamics of weight accumulation and linear growth, survival, fish productivity, hybrids obtained from cryo-males were not inferior to young-of-the-year wild carp-domestic carp obtained from local males. However, according to the main body-build indices, they had similar values but were slightly inferior. Originality. For the first time in Ukraine, a comparative analysis of fisheries and biological parameters of young-of-the-year wild carp-domestic carp hybrids obtained from males of different genetic origin in terms of industrial hybridization was performed. Practical value. The results of this work will provide a comprehensive assessment of fish and biological parameters of young-of-the-year wild carp-domestic carp hybrids obtained from Amur wild carp males of different genetic origin and justify their use in breeding work for further reproduction in breeding farms and to obtain industrial hybrids. Key words: Amur wild carp, genesis, body weight, body length, fatness, fish productivity.","PeriodicalId":30821,"journal":{"name":"Ribogospodars''ka Nauka Ukraini","volume":"1 1","pages":"66-79"},"PeriodicalIF":0.0,"publicationDate":"2021-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47588926","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
K. Namiq, S. Mahmood, N. Abdulrahman, B. Hassan, A. A. Sadraddin, R. Rashed
Purpose. Qualitative study of fillets of common carp (Cyprinus carpio L.)fed with natural powder of water fern (Azollafiliculoides) and comparison with previous studies. Methodology. The proximate composition of the samples of fish fillets was done: protein content through Kjeldahl method, lipid content was determined according to AOAC (Association of Official Analytical Chemists) official method.Sensory evaluations were done by panelists. Methods for determining water holding capacity, cooking losses and biochemical analysis were standard, accepted in the world scientific community. Findings. Dissimilarities in the composition of proteins and fats were revealed. There was a significant difference in water holding capacity, cooking losses and biochemical analysis results. According to research, the powder of water fern is recommended for use in the feeding of carp, in order to improve the quality of its fillets. Originality. In recent years, a significant amount of research has focused on the use of plants or their extracts in fish nutrition, due to the presence of antioxidants in them. Water fern powder is one of the cheapest dietary supplements, which can be used in aquaculture to reduced spending on cultivation, contemporaneously improving fish health. This is due to the fact that these aquatic plants are widespread in water bodies of most warm countries and contain many important antioxidants that can positively affect the quality of fish fillets. Practical value. Based on the data obtained, a method for improving the quality of carp fillets has been developed. So, using water fern powder in its feeding, it is possible to improve the biochemical composition, increase taste, reduce losses during cooking, and also adjust the ability to retain water. Therefore, the proposed diet is also very useful for processing aquaculture products. Keywords: water fern (Azollafiliculoides), carp (Cyprinus carpio L.), fish feeding, fish fillets quality.
{"title":"Effect of feeding common carp (Cyprinus carpio (Linnaeus, 1758)) with water fern (Azolla filiculoides (Lam.)) on its fillet quality","authors":"K. Namiq, S. Mahmood, N. Abdulrahman, B. Hassan, A. A. Sadraddin, R. Rashed","doi":"10.15407/FSU2021.01.094","DOIUrl":"https://doi.org/10.15407/FSU2021.01.094","url":null,"abstract":"Purpose. Qualitative study of fillets of common carp (Cyprinus carpio L.)fed with natural powder of water fern (Azollafiliculoides) and comparison with previous studies. Methodology. The proximate composition of the samples of fish fillets was done: protein content through Kjeldahl method, lipid content was determined according to AOAC (Association of Official Analytical Chemists) official method.Sensory evaluations were done by panelists. Methods for determining water holding capacity, cooking losses and biochemical analysis were standard, accepted in the world scientific community. Findings. Dissimilarities in the composition of proteins and fats were revealed. There was a significant difference in water holding capacity, cooking losses and biochemical analysis results. According to research, the powder of water fern is recommended for use in the feeding of carp, in order to improve the quality of its fillets. Originality. In recent years, a significant amount of research has focused on the use of plants or their extracts in fish nutrition, due to the presence of antioxidants in them. Water fern powder is one of the cheapest dietary supplements, which can be used in aquaculture to reduced spending on cultivation, contemporaneously improving fish health. This is due to the fact that these aquatic plants are widespread in water bodies of most warm countries and contain many important antioxidants that can positively affect the quality of fish fillets. Practical value. Based on the data obtained, a method for improving the quality of carp fillets has been developed. So, using water fern powder in its feeding, it is possible to improve the biochemical composition, increase taste, reduce losses during cooking, and also adjust the ability to retain water. Therefore, the proposed diet is also very useful for processing aquaculture products. Keywords: water fern (Azollafiliculoides), carp (Cyprinus carpio L.), fish feeding, fish fillets quality.","PeriodicalId":30821,"journal":{"name":"Ribogospodars''ka Nauka Ukraini","volume":"1 1","pages":"94-111"},"PeriodicalIF":0.0,"publicationDate":"2021-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48347430","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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