IDE IT IS THE PROSPECTIVE OBJECT FOR AGRICULTURAL FISH FARMING

1970 ◽  
pp. 80-84
Author(s):  
G. Е. Servetnik
Keyword(s):  
Cold Water ◽  
Age Groups ◽  
Fish Farming ◽  
Early Spring ◽  
Physiological Status ◽  
Fish Farms ◽  
Natural Reproduction ◽  
Blood Cell Morphology ◽  
Leuciscus Idus ◽  
Potential Object

The Ide (Leuciscus idus) it is the cold-water fish, which allows for carp spawning usage for natural and artificial reproduction. The article presents materials about the Ide cultivation in the pond polyculture as potential object for agricultural reservoirs. The Ides are characterized by high immunological and physiological status; its blood cell morphology differentials contain up to 30% of the small lymphocytes (5 mkm). High activity of the humoral factor (congenital immunity) was indicated (complement - 0.24, properdin - 2.28 U / ml). Fish-biological estimation was carried out in fish farms in 1-2 fishing zones. Spawnings received from group were taken to grow two-year-olds yearlings. The weight of the yearlings varied within 5-7 g. Carps and Ides were realized in to the fishing pond with total area of 57 hectare with the density of 1000 unit/ ha and 20 unit/ha (2% in relation to carp) respectively. The biological features of these fish are briefly described and the questions of growing various age groups are considered, up to the formation of brood stocks. It is established that the Ides spawning is active in the conditions of carp spawning ponds, and the Ide’s intensity of growth in the first and second years of life in ponds is higher than in natural conditions. In the fishery "Shostka" the two-year-olds Ide reached 180... 200 g. A comprehensive assessment of the Ide producers in the "Shostka" and "Kirya" farms showed that Ide can be included in the Carp producing technology with the allocation of the wintering pond which will be harvested at an earlier time. In our opinion, it is most expedient to use the natural reproduction way – to spawn in early spring in spawning carp ponds, while the weight gain of the eggs can reach 300 ... 600 g.

scholarly journals Wild salmonids are running the gauntlet of pathogens and climate as fish farms expand northwards

2020 ◽  
Author(s):  
Knut Wiik Vollset ◽  
Robert J Lennox ◽  
Jan Grimsrud Davidsen ◽  
Sindre Håvarstein Eldøy ◽  
Trond E Isaksen ◽  
...  
Keyword(s):  
Cold Water ◽  
Arctic Charr ◽  
Fish Farming ◽  
Fish Farms ◽  
The North ◽  
Arctic Regions ◽  
Northern Areas ◽  
Infection Pressure ◽  
High Infection ◽  
Research Questions

Abstract Salmon farming has multiplied from a side business of coastal farmers to one of the world's major aquaculture species. This has dramatically altered the disease dynamics between farmed and wild salmonids. As salmon fish farming has increased, new restrictions have been enforced to combat emerging density-dependent impacts of pathogen spillover. In most northern and arctic regions, the effects of pathogens from fish farms on wild salmonids have been minimal for two key reasons: (i) relative low density of fish farms in the north and (ii) cold water temperatures. However, both factors are set to change dramatically. On one side, there is an increasing interest in utilizing northern areas for fish farming due to limited capacity for expansion in mid-latitude regions. On the other side, climate change is rapidly changing these northern ecosystems. High-latitude regions inhabit some of the largest remaining wild Atlantic salmon populations in the world along with sea trout and Arctic charr. Wild salmonids in the north have most likely seldom been exposed to high infection pressure, and we question how these populations will cope with changes that are coming. We identify 12 research questions emerging from these imminent changes and discuss methodologies for addressing them. We conclude that policies related to fish farming must consider uncertainties with respect to pathogen dynamics in the north until these research questions are fully addressed.

scholarly journals THE EFFECT OF PROBIOTIC DIET ON HEMATOLOGY AND PISCICULTURAL PARAMETERS OF YEARLING HYBRIDS OF RUSSIAN AND SIBERIAN STURGEON

2015 ◽  
Vol 4 (4) ◽  
pp. 113-116
Author(s):  
Olga Nikolaevna Gutsulyuk
Keyword(s):  
Animal Feed ◽  
Stocking Density ◽  
Fish Farming ◽  
Positive Influence ◽  
Siberian Sturgeon ◽  
Control Group ◽  
Physiological Status ◽  
Fish Farms ◽  
Commercial Fish ◽  
Hematological Indices

In fish farming practices, stocking density is a key factor in determining the productivity and profitability of commercial fish farms. the use of probiotics as farm animal feed supplements increases the animals growth and improve its health by increasing its resistance to disease. this study was undertaken to examine the effect of dietary probiotics on yearling hybrids of russian and siberian sturgeon, based on hematological profile and piscicultural performance. the experience was carried out in 4 groups (control and treatment). in control group, probiotic was not applied in diet but in treatment groups, probiotics Bacell, Monosporin, and Prolam was administered in feed at a concentration of 2%. as a result, a positive influence on growth performance and survival rate were assessed together with improvement of physiological status (based on hematological indices). thus, probiotics addition to diet had the effect on erythrocyte count, hemoglobin, leucocyte count, percent of lymphocyte, serum total protein, percent of neutrophile and monocyte the results suggest that probiotics can stimulate immune parameters hybrids of russian and siberian sturgeon and can be successfully used in fishfarming.

scholarly journals Medicinal and prophylactic measures against bacteriosis in fish farming

2021 ◽  
Author(s):  
L.N. Yukhimenko ◽  
S.B. Tokareva ◽  
M.S. Kukin ◽  
L.I. Bychkova
Keyword(s):  
Negative Impact ◽  
Morphological Changes ◽  
Morphological Characteristics ◽  
Fish Farming ◽  
Coliform Bacteria ◽  
Physiological Status ◽  
Forage Production ◽  
Fish Farms ◽  
Prophylactic Measures ◽  
Resistant Strains

The article reflects the negative impact on the microbiocenosis of water, fish and the environment of the uncontrolled use of antibacterial drugs, under the influence of which foci of late autumn aeromonosis (Moscow region) and summer pseudomonosis (Rostov region) are formed in fish farms, opportunistic microorganisms: Aeromonads, Pseudomonads, Acinetobacteria, Moraxella, coliform bacteria change their morphological characteristics (capsules are formed in coliform bacteria and Moraxella, the swarming phenomenon characteristic of Proteus - in Acinetobacteria) and increase their virulence. Along with this, there is a large number of resistant strains of bacteria, antibiotic-dependent mutants in those farms where several courses of antibacotherapy were conducted, the active substance of which is ciprofloxacin, morphological changes in the skeleton were noted in fish, the spine acquired an S-shaped shape, and pinpoint hemorrhages appeared on the liver, like from a needle prick. Resistant strains acquire not only epizootic, but also epidemiological significance, especially for people working in the field of fish farming and forage production, because resistant strains by conjugation can transfer their R-factor of multiple resistance to any strains, which has now become a worldwide problem, according to WHO. In such a situation, the main method of struggle is prevention, increasing the immune-physiological status of fish by using probiotics, high-quality compound feed, creating conditions for a comfortable fish keeping. If a course of antibiotic therapy was carried out during the outbreak, then it is imperative to carry out a 7-10-day course of feeding with a probiotic.

Efficacy of Adding Folic Acid to Foods

2012 ◽  
Vol 82 (3) ◽  
pp. 177-186 ◽  
Author(s):  
Violeta Fajardo ◽  
Gregorio Varela-Moreiras
Keyword(s):  
Folic Acid ◽  
Age Groups ◽  
Nutritional Deficiencies ◽  
Physiological Status ◽  
Food Fortification ◽  
Limited Information ◽  
Dietary Recommendations ◽  
Nutritional Education ◽  
Food Composition Tables ◽  
Staple Foods

In the past, food fortification along with nutritional education and the decrease in food costs relative to income have proven successful in eliminating common nutritional deficiencies. These deficiencies such as goiter, rickets, beriberi, and pellagra have been replaced with an entirely new set of “emergent deficiencies” that were not previously considered a problem [e.g., folate and neural tube defects (NTDs)]. In addition, the different nutrition surveys in so-called affluent countries have identified “shortfalls” of nutrients specific to various age groups and/or physiological status. Complex, multiple-etiology diseases, such as atherosclerosis, diabetes, cancer, and obesity have emerged. Food fortification has proven an effective tool for tackling nutritional deficiencies in populations; but today a more reasonable approach is to use food fortification as a means to support but not replace dietary improvement strategies (i. e. nutritional education campaigns). Folic acid (FA) is a potential relevant factor in the prevention of a number of pathologies. The evidence linking FA to NTD prevention led to the introduction of public health strategies to increase folate intakes: pharmacological supplementation, mandatory or voluntary fortification of staple foods with FA, and the advice to increase the intake of folate-rich foods. It is quite contradictory to observe that, regardless of these findings, there is only limited information on food folate and FA content. Data in Food Composition Tables and Databases are scarce or incomplete. Fortification of staple foods with FA has added difficulty to this task. Globally, the decision to fortify products is left up to individual food manufacturers. Voluntary fortification is a common practice in many countries. Therefore, the “worldwide map of vitamin fortification” may be analyzed. It is important to examine if fortification today really answers to vitamin requirements at different ages and/or physiological states. The real impact of vitamin fortification on some key biomarkers is also discussed. An important question also to be addressed: how much is too much? It is becoming more evident that chronic excessive intakes may be harmful and a wide margin of safety seems to be a mandatory practice in dietary recommendations. Finally, the “risk/benefit” dilemma is also considered in the “new” FA-fortified world.

SELECTED MORPHOMETRIC AND BIOLOGICAL CHARACTERISTICS OF IDE LEUCISCUS IDUS (LINNAEUS, 1758) IN THE LOWER IRTYSH

2017 ◽  
pp. 46-53
Author(s):  
Elizaveta L'vovna Liberman ◽  
Andrey Aleksandrovich Chemagin
Keyword(s):  
Maximum Rate ◽  
Linear Growth ◽  
Age Groups ◽  
Annual Growth ◽  
Recreational Fishing ◽  
Opisthorchis Felineus ◽  
Gonad Maturity ◽  
Study Results ◽  
Leuciscus Idus ◽  
Old Females

Ide Leuciscus idus (Linnaeus, 1758) belongs to Cyprinidae family and is used in commercial and recreational fishing. Ide is an intermediate host of Opisthorchis felineus . In the control catches (summer 2015, the Lower Irtysh, Uvatsky, Tobolsky and Vagaysky regions of Tyumenskaya Oblast’) there were observed species with lengths 11.9-38.1 cm, with a total weight 45-1085 g. Some species aged 9 years old and even older. The maximum rate of linear growth was registered in ide species younger than 3 years old, at this age annual growth made 5 cm. The annual growth of four-year-old females made 5.4 cm, males - 2.8 cm. Females aged 3+ exceeded males in body weight and length. Species at the age 1+…2+ years old added 204.6% in their mass; at the age 2+…3+ years old - 65.3%, at 3+…4+ years old - 29.4%. Gender and gonad maturity were determined in species older than 2+, but not in all species. Among females aged 2+…4+ there were found species with I and II stage of gonad maturity. Females aged 5+ were spawned-out species having VI-II stage of gonad maturity (48%); female species aged 6+ having IV stage of gonad maturity made 33.4%. Among males in the age groups of 2+ and 3+ there were registered species with I stage (38.5 and 20%, respectively) and II stage (61.5 and 80%, respectively) of maturation only. Fatness degree of studied species ranged from 0 to 5. Species aged 2+ had I stage (24% species); in the aged groups the proportion of such species decreased (5+ years old - 7.8%; 6+ years old - 12.1%; 8+ years old - 5.9%); species aged 2-7 had II stage of fatness; proportion of older species also decreased. Species with III and IV stage of fatness were found more often (III stage was observed in 100% of the fish species at the age of 1+). Proportion of species with V stage was minor, it increased with age. According to the analysis of the study results, nutritive base in the basin is found satisfactory for ide growth and development.

Fish farming in Denmark: environmental impact of regulative legislation

1995 ◽  
Vol 31 (10) ◽  
pp. 73-84 ◽  
Author(s):  
T. M. Iversen
Keyword(s):  
Organic Matter ◽  
Environmental Impact ◽  
Freshwater Fish ◽  
Aquatic Environment ◽  
Action Plan ◽  
Fish Farming ◽  
Fish Farms ◽  
Nitrogen And Phosphorus ◽  
Local Impact ◽  
The Impact

The main environmental problems associated with fish farming in Denmark are attributable to the dam, the “dead reach” and nutrient and organic matter discharge. The environmental regulation of fish farming in Denmark started with the Environmental Protection Act of 1974, the Statutory Order of 1985 forbidding wet feed, and the Action Plan on the Aquatic Environment of 1987. In the case of freshwater fish farms, the latter was implemented through the measures stipulated in the 1989 Statutory Order on Fish Farms. The impact of Danish legislative measures to reduce and regulate the environmental effects of freshwater fish farms can be summarized as follows: - the number of fish farms has been reduced from about 800 in 1974 to about 500 at present; - production has tripled since 1974 and has been stable since 1989; - a change from wet to dry feed has reduced the environmental impact of the farms; - the national goals of the Action Plan on the Aquatic Environment of 1987 for reducing fish farm discharges of organic matter, nitrogen and phosphorus have been fulfilled. The main remaining problems are that: - the local impact of fish farms on downstream stream quality is still much too high in about 15% of cases; - the problem of the passage of migrating invertebrates and fish is still unsolved at some farms; - the problems posed by “dead reaches” are still unsolved. It is concluded that sustainable fish farming is possible in Denmark, but with the present technology production will have to be significantly reduced.

Environmental impact of nutrients from nordic fish farming

1995 ◽  
Vol 31 (10) ◽  
pp. 61-71 ◽  
Author(s):  
M. Enell
Keyword(s):  
Major Part ◽  
Fish Farming ◽  
Fish Farms ◽  
Feed Composition ◽  
The North ◽  
Comprehensive Development ◽  
The Baltic ◽  
Inland Water Bodies ◽  
The Impact ◽  
Feed Coefficient

During the last 20 years there has been an interesting development of the Nordic fish farming, with regard to the feeding and farming technology and to the increase in production quantities. During the period 1974-1994 the production increased from 15,800 to about 250,000 tonnes/year. In 1974 the major part of the production was in Denmark, and in 1994 the major part was in Norway. The nutrient impact of fish farming on surrounding sea areas is mainly a function of the feed coefficient, the feed composition and metabolic processes in the fish. The comprehensive development of the feed composition and the feeding technology has resulted in reduced load of unmetabolized nutrients from fish farms, calculated per tonne fish produced. In 1974 the mean Nordic feed coefficient was 2.08 and in 1994 the coefficient was 1.25. Feed coefficients of 1.0-1.1 are now reported for Danish and Norwegian freshwater and marine fish farms. The nitrogen (N) and phosphorus (P) content of the feed has decreased, in addition the quality of the nutrient substances in the feed has changed, especially for N. The N content has decreased from 7.8 to 6.8% during the period 1974-1994 and the content of P has decreased from 1.7 to 0.7% during the same period. This development of the feed coefficient and the feed composition has resulted in a present load from a typical Nordic fish farm of 55 kg N and 4.8 kg P/t fish produced. The figures for 1974 were 132 kg N and 31 kg P/t fish produced. The Nordic fish farming production in 1994 resulted in a load of about 13,750 t N and about 1,200 t P on the actual recipients. The load from the Swedish, Finnish and Danish fish farming operations, with the Baltic Sea and the Skagerrak as the recipients, is negligible in comparison with other pollution sources. The quantities of N and P from the fish farming are equal to 0.5% of the atmospheric deposition on the sea surface and 3% of the atmospheric P load. Norwegian, Icelandic and the Faroe Islands fish farming operations are using the North Sea and the Norwegian Sea as the recipients. However, the nutrient load from single fish farms in certain coastal and inland water bodies can be significant and must be considered in the impact assessment together with other sources.

Growing commodity tilapia in various experimental conditions

2020 ◽  
pp. 26-36
Author(s):  
F. A. Altayeva
Keyword(s):  
Fish Farming ◽  
Biological Indicators ◽  
Fish Farms ◽  
Experimental Conditions ◽  
Fish Breeding ◽  
Closed Water ◽  
The Republic ◽  
Short Time ◽  
High Fish ◽  
Experimental Ponds

The article presents the results of growing tilapia to marketable weight in experimental sites (Chilikskoye pond pond farms LLP, KATU named after S. Seifullin JSC and Kapshagai spawning farm — 1973 LLP). In the process of carrying out research works, the methods generally accepted in fish farming, hydrochemistry, hydrobiology, hydrology, ichthyology, as well as foreign normative and technical guidelines and methodological instructions on the technology of growing commercial tilapia in industrial conditions were used. Monitoring of hydrochemical analyses of water in ponds, swimming pools, and closed water supply installations is given. Fish-breeding and biological indicators of tilapia grown in various experimental conditions are presented. The results of the studies have shown the real possibility of growing tilapia in various conditions of fish farms in Kazakhstan. Based on the results of the work, the following conclusions were made: — satisfactory fish-breeding indicators were obtained with various cultivation technologies (as when growing tilapia in polyculture and monoculture in ponds, in pools, as well as cultivation in the recirculation system); — the cultivation of tilapia in the experimental ponds of the fish farm of the Almaty region of the Republic of Kazakhstan has shown the possibility of obtaining high fish-breeding biological indicators of tilapia and the ability to grow to marketable mass in a short time; — as a result of experimental cultivation in various conditions, it was found that the survival rate was not lower than 97%; — as a result of the analysis of the profitability indices of the developed technologies, it was found that the most profitable was the technology of growing marketable tilapia products in monoculture ponds on water with a natural thermal regime in Chilik Pond Economy LLP.

PREVENTIVE MEASURES IN BREEDING FISHING FARMS: ECOLOGICAL AND VETERINARY ADDITIONS

2018 ◽  
Vol 1 (1) ◽  
pp. 84-89
Author(s):  
A. M. Naumova ◽  
◽  
L. A. Rozumnaya ◽  
A. Yu. Naumova ◽  
L. S. Loginov ◽  
...  
Keyword(s):  
Preventive Measures ◽  
Fish Farming ◽  
Fish Health ◽  
Fish Farms ◽  
Scientific Publications ◽  
Commercial Fish ◽  
Fish Products ◽  
Contagious Diseases ◽  
Veterinary Research ◽  
Significant Damage

The influence of ecological, epizootological and technological factors on fish health was studied. It is shown that disregard of environmental, technological and veterinary-sanitary requirements in the reproduction and cultivation of fish leads to the emergence of contagious and non-contagious diseases and causes significant damage to fish farming. The analysis of previously approved veterinary and sanitary rules, instructions, recommendations for breeding and commercial fish farms, as well as patent documentation and scientific publications in the field of ecological and veterinary research in fish farming is carried out. The possibility of using modern ecological and veterinary-sanitary achievements for the protection of fish health is shown. The complex system of preventive measures (organizational, environmental-technological and veterinary-sanitary), supplemented by modern ecological and veterinary achievements, in its implementation will allow to reduce losses of fish products and increase efficiency of production.

scholarly journals Economics of ornamental fish farming industry in Madurai District, Tamil Nadu

2017 ◽  
Vol 64 ◽  
Author(s):  
T. Umamaheswari ◽  
M. Rajakumar ◽  
P. Chidambaram
Keyword(s):  
Tamil Nadu ◽  
Sampling Technique ◽  
Fish Farming ◽  
Ornamental Fish ◽  
Expected Profit ◽  
Profit Margin ◽  
Fish Farms ◽  
The Cost ◽  
Farming Industry ◽  
Ranking Technique

India has enormous potential for the development of ornamental fish business. Although the country has conducive environmental conditions for breeding and culture of ornamental fishes, its share in export of ornamental fishes is less than 1%. The present study was undertaken to address the constraints prevailing in ornamental fish farming. Study was carried out among 44 ornamental fish farms in Madurai District, Tamil Nadu by adopting random sampling technique. The selected farms were classified into small (<0.5 ha) and medium farms (0.5-2 ha) and the data were collected by personally interviewing the fish farmers. The study attempted to analyse the socio-economic characteristics of respondents, existing supply chain, constraints involved in ornamental fish farming, annual revenue loss due to major constraints, treatment cost and expected profit margin. Various constraints were classified as production, marketing and others and were ranked using Garrett ranking technique. Tabular and percentage analyses were used to estimate the cost of treatment, revenue loss and expected profit margin. Four types of marketing channels were observed in the study area. Disease outbreak was found to be the major constraint faced by the farmers and hence, the revenue loss was estimated for the same. The annual revenue loss was found to be higher for the small ornamental units when compared to medium farms, which showed higher profit margin than small ornamental fish farms.

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