Examples from the practice of fish farms trying to operate with zonal fisheries science, to plan their production based on the accelerated introduction of modern innovative technologies for increasing production volumes. It is concluded that to accelerate the development of agricultural commodity fish farming in local waters state the necessary operational measures to organize fishing enterprises directly to the district municipalities and the regions.
The main fish species of the river Khatanga. It is noted that the commercial ichthyofauna of the basin include char, grayling, whitefish (Arctic Cisco, whitefish, whitefish, whitefish, Peled, whitefish, tugun), smelt, burbot, pike, perch. The amount of catch is largely determined in the last five years, catches of vendace (51 %), whitefish, broad whitefish and Cisco is 10 %, burbot and pike — 8 %. 2 marks the peak of catches: the first (about 20 % of the catch) are in feeding migrations of fish in June-July, and the second on spawning migration migration after spawning in August-November (about 80 %). Biological preconditions for decrease of fish production in the basin of the Khatanga there. Fishing of aquatic bioresources developed not more than 65 %. Low catch due to the poor state of organization of the fishery. For full development you need to create a fish processing plant and to improve control over the produced fish.
The peculiarities of the estimation of productivity from different points of view, including from the point of view of the consumer of aquaculture products; motivation, components and methods of an integrated estimation of productivity of aquaculture origin. The proposed new system of assessment of material, energy and economic (cost) components. It is stated that evaluation of the generative products of the fish that produce caviar, have food and commercial value.
As a result of termination of the centralized procurement of pituitary glands necessary for reproduction of these fish in hatcheries, ostrobotnia businesses have moved to the use of alternative drugs. The article summarizes years of experience of testing various agents for stimulating spermiation and ovulation in sturgeon. Pituitary glands of young aquaculture Siberian (Lena) sturgeons, carp fishes (bream and carp), chum salmons, European and African catfishes and chicken were tested, as well as surfagon, follimagum and the ovarian fluid of sterlet. In addition to the pituitary glands of carps and surfagon, which are already widely used, pituitary glands of catfish and young aquaculture sturgeon were found to be promising for use in sturgeon farming.
How to produce large quantities of commodity products necessitates the creation and maintenance of breeding herds of fish with high fecundity, survival and growth rate. Main principles of selection work with breeds of fish are stated. The basic changes of an exterior of fish as a result of conducted work on example АЗК are stated. It is marked exterior changes in the desirable I will shift.
The results of the content of the ovigerous females clawed crayfish (Astacus leptodactylus Esch.) In a hatchery and producing the larvae stage II by various methods using heated water relief power plant (Brest region, Belarus). For warm water fish farms it is recommended to keep th ovigerous females and produce larvae in mill sieve cages placed in incubation pond and contain ovigerous females in plastic tubs (without putting them in individual cells) until hatching. In using these techniques to produce 100 thousand of clawed crayfish larvae stage II with survival of 70–90 % is required about 700–900 females with level of fecundity 150 eggs per female.
Тhe article provides a brief overview of one of the most dynamically developing industries of Vietnam aquaculture. The data on species composition and volume of the grown products.
Given the features of toroviruses in certain industries, including farming. The technologies (methods) of preparation of the fodder component (PFC) of peat in feed for fish developed by scientists at VNIPRH. Indicates that cooking technology PFC is based on a unique innovative and highly relevant component on the basis of resource saving. Long-term tests proved effectiveness of such replacement, and the use of PFC in the specified quantity has not affected the condition of fish and their physiological status. It is proposed to resume this work as resource-saving in the production of feed from non-traditional raw materials.
Purification of water from the accumulated products of metabolism of fish is an obligatory process in RAS, which is essential for reuse of water. Common schema transformation by nitrification and subsequent denitrification is characterized by a number of problematic issues, which are avoided using for the removal of nitrogen compounds of higher aquatic plants — plasticity. The preliminary study on the possibility of cultivation of local species of macrophytes Lemna minor, L. gibba and Spirodela polyrrhiza showed the promise of the inclusion of such plants in water purification systems recirculation systems. More difficult was the cultivation in conditions eyhornii Eichhornia crassipes.
Conservation Aquaculture is dedicated to conservation, protection and enhancement of threatened and endangered species and separate populations of fishes. Hatchery programs for restocking a wild population are risky measures that should be used only when the population is verging upon extinction. The artificial propagation of paddlefish began in USA in early 1970s. In 1972–2000 years American organizations conducted massive releases of hatchery fry and fingerlings of paddlefish into Mississippi basin and river systems of Texas and Louisiana. In 2000s years American scientists understood that success of hatchery programs depended on ecological conditions of river systems. The hatchery programs for releases of paddlefish fingerlings into Caddo lake, Allegheni River and other reservoirs are reviewed.
