GROWING LARVAE AND JUVENILES OF CARP AND HERBIVOROUS FISH IN THE DIRECTION OF COMMERCIAL LAKE FISH FARMING

Purpose: development of a layout-structural solution and technology for fish-breeding and reclamation complex operation for ecological improvement of phyto-contaminated reservoirs and fish farming in them. One of the urgent environmental problems typical for river and lake reservoirs is the overgrowth of their shallow waters with higher aquatic vegetation. Phyto-contamination of water bodies leads to a depletion of their ecological biodiversity, displacement of valuable species of aquatic flora and fauna, the decrease in their biological productivity and deterioration of conditions for various environmental management (water supply, fish farming, recreation, etc.). Rational and efficient use of natural resources cannot be ensured without ecological improvement of such objects. One of the directions of phyto-contaminated water bodies treatment is to carry out their biological reclamation by the introduction of herbivorous fish species into them. To increase the efficiency of such reclamation, it is proposed to create and use reservoir fish-breeding and reclamation complexes. Materials and Methods. The experimental and theoretical basis for the development of layout-structural solutions and technologies for the operation of such complexes was provided by known information and author's observations of the stocking of reservoirs. Results. The established shortcomings of the applied technologies led to the need to create the complexes that ensure the cultivation of fish stocking material adapted to the conditions of the stocking reservoir and the implementation of acclimatization measures for introducing herbivorous fish into the water body. Conclusions. The layout-constructive scheme and technology of fish-breeding and reclamation complex operation are proposed, which makes it possible to carry out the ecological improvement of phyto-contaminated reservoirs and, in general, to improve conditions, to increase the complexity, efficiency of using their resource potential and fulfillment of nature management.

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Innovative technologies of pasture lake fish farming in the Trans-Urals

Fisheries ◽

10.37663/0131-6184-2021-1-61-69 ◽

2021 ◽

Vol 2021 (1) ◽

pp. 61-69

Author(s):

Igor Mukhachev

Keyword(s):

Salt Water ◽

Silver Carp ◽

Open Water ◽

Fish Farming ◽

Forest Steppe ◽

Industrial Complex ◽

Fish Farms ◽

Commercial Fish ◽

One Year ◽

Lake Fish

The article describes the development of pasture lake fish farming within the forest-steppe Trans-Urals on the basis of improving the technologies of the fish-breeding process of one - year and two-year cultivation of commercial fish. Thanks to the introduction of integrated reclamation of lakes of the overseas type of the Trans-Urals and innovative fish farming technologies that use the reclamation effect of aeration of reservoirs in winter, loosening of bottom silt deposits during open water, the natural production potential of the lakes allowed to increase the fish productivity from 30-50 kg / year to 130-200 kg/ha per year. Based on the long-term monitoring of the ecological and fisheries situation of the lakes, it is recommended to intensify the process of modernization of existing fish farms and start creating new ones, which will significantly increase the importance of the Trans-Urals fisheries as part of the agro-industrial complex of Russia. It is recommended to include herbivorous fish – white Amur and white silver carp, and consumers of detritus and bottom silt-pilengas, which can effectively grow in salt water reservoirs, which are many within the southern Trans-Urals.

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Guidance of Marketing Factors of Freshwater Fish Farming Entrepreneur Business Success in Nakorn Nayog Province, Thailand

RCSSHIS-2016, PLBE-16, Dec. 16-17, 2016 Pattaya (Thailand) ◽

10.15242/dirpub.dirh1216015 ◽

2016 ◽

Keyword(s):

Freshwater Fish ◽

Fish Farming ◽

Business Success

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Antagonistic activity of Bacillus subtilis strains isolated from various sources

Ukrainian Journal of Ecology ◽

10.15421/2018_354 ◽

2018 ◽

Vol 8 (2) ◽

pp. 354-364

Author(s):

A. N. Irkitova ◽

A. V. Grebenshchikova ◽

A. V. Matsyura

Keyword(s):

Escherichia Coli ◽

Bacillus Subtilis ◽

Wild Strain ◽

Fish Farming ◽

Antagonistic Activity ◽

Antagonistic Effect ◽

E Coli ◽

Long Period ◽

Test Culture ◽

Agar Media

An important link in solving the problem of healthy food is the intensification of the livestock, poultry and fish farming, which is possible only in the adoption and rigorous implementation of the concept of rational feeding of animals. In the implementation of this concept required is the application of probiotic preparations. Currently, there is an increased interest in spore probiotics. In many ways, this can be explained by the fact that they use no vegetative forms of the bacilli and their spores. This property provides spore probiotics a number of advantages: they are not whimsical, easily could be selected, cultivated, and dried. Moreover, they are resistant to various factors and could remain viable during a long period. One of the most famous spore microorganisms, which are widely used in agriculture, is Bacillus subtilis. Among the requirements imposed to probiotic microorganisms is mandatory – antagonistic activity to pathogenic and conditional-pathogenic microflora. The article presents the results of the analysis of antagonistic activity of collection strains of B. subtilis, and strains isolated from commercial preparations. We studied the antagonistic activity on agar and liquid nutrient medias to trigger different antagonism mechanisms of B. subtilis. On agar media, we applied three diffusion methods: perpendicular bands, agar blocks, agar wells. We also applied the method of co-incubating the test culture (Escherichia coli) and the antagonist (or its supernatant) in the nutrient broth. Our results demonstrated that all our explored strains of B. subtilis have antimicrobial activity against a wild strain of E. coli, but to varying degrees. We identified strains of B. subtilis with the highest antagonistic effect that can be recommended for inclusion in microbial preparations for agriculture.

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Typical errors and violations of biotechnics of artificial breeding of pacific salmon

Rybovodstvo i rybnoe hozjajstvo (Fish Breeding and Fisheries) ◽

10.33920/sel-09-2008-01 ◽

2020 ◽

pp. 13-23

Author(s):

Ekaterina Grinberg

Keyword(s):

Production Process ◽

Preventive Measures ◽

Pacific Salmon ◽

Fish Farming ◽

Important Condition ◽

The Third ◽

Fish Breeding ◽

Artificial Breeding ◽

Strict Compliance

In two parts of the article, more than 70 errors and violations of the Biotechnics of artificial breeding of Pacific salmon in salmon hatcheries are collected and summarized, which lead to an immediate or delayed deterioration of the quality of reared fry and a decrease in their survival rate. Deviations from the biological basis of fish farming are shown and possible consequences of such errors or violations are predicted. In the first part of the article (#7,2020) there were General errors (throughout the entire fish-breeding process), as well as violations of Biotechnics during the work with producers, collecting eggs and preparing them for incubation, in the second part-violations of Biotechnics during the incubation of eggs, holding pre-larvae, rearing and release of young. Their correction, prevention or minimization of consequences will significantly improve the quality of sexual products and offspring from producers, increase the linear and weight gain of juveniles during rearing, improve the coefficient of feed payment, reduce the time of rearing, improve the epizootic situation by developing immunity in fry and mobilizing other protective reactions of their body, significantly reduce waste at all stages of the production process, increasing survival by 10–15%. In conclusion, it is noted that the first and most important condition for an efficient salmon hatchery is the creation of optimal environmental conditions at each stage of the production process. The second condition is strict compliance with the Biotechnics of artificial salmon breeding and the complex of veterinary and sanitary, fish-breeding and meliorative and therapeutic and preventive measures. The third is the availability of competent specialists who regularly improve their skills in accredited Universities to implement, control and manage the first two conditions.

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Results of a comparative study of the use of fodder worms of two breeds for pool growing of young tilapy and clary catfish in the conditions of the Almaty

Rybovodstvo i rybnoe hozjajstvo (Fish Breeding and Fisheries) ◽

10.33920/sel-09-2006-09 ◽

2020 ◽

pp. 73-80

Author(s):

Z. Bolatbekova ◽

S. Assylbekova ◽

B. Kulatayev ◽

S. Koishybayeva ◽

N. Bulavina

Keyword(s):

Comparative Study ◽

Biochemical Composition ◽

Nutritional Value ◽

Fish Farming ◽

Biological Indicators ◽

Comprehensive Analysis ◽

Fish Feed ◽

Fish Breeding ◽

Breeding Zone ◽

Improved Methods

The aryicle presents the results of a comparative study of the biochemical composition of earthworms of dendrobene and prospector rocks, the peculiarities of their cultivation and their use for feeding when growing juvenile tilapia and clary catfish. The experience of cultivating earthworms of two breeds using the improved methods of foreign authors is described. The results of a study of the biochemical composition of cultivated objects that determine their nutritional value for feeding fish are presented. The fish-breeding and biological indicators of juvenile tilapia and clary catfish, obtained during the cultivation of dendrobene and prospector in fish farming in the Almaty region (VI fish-breeding zone) during worm feeding, are analyzed. A comprehensive analysis of the studied indicators made it possible to assign a certain rating place to each worm breed in relation to its use as fish feed.

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