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осетр

русский осетр

УЗВ

00:00:03

sea in its basin produces the

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majority of the world's catch of sturgeon

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every year. The

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Caspian Sea can grow 150,180 thousand centners of herbs at the dacha, and

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three times more. If the catches hardly grow,

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then the reason for this is not the feeding conditions of the

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sea, but the growing

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problem of reproduction. in the rivers

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for spawning sturgeon fish, beluga

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sturgeon stellate sturgeon from the Caspian Sea enter the Volga

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less than the Urals, even smaller kuru terek bags,

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and now the Volga, the main spawning river for

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sturgeon, has become of little use for this

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after regulation and the source, the

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spawning area is practically limited to the

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dam of the Volgograd hydroelectric complex above

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it,

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sturgeon are passed from With the help of a fish

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lift, the few remaining

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spawning grounds,

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experts, however, claim that the catch of

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sturgeon bones

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can not only be preserved but also

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increased if the reconstruction of the water

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management and mandatory measures to

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preserve natural reproduction

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are accompanied by

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artificial breeding of sturgeon

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in the USSR, technologies for

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artificial breeding of sturgeon have been developed at

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all levels of the fish farming process.

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and this complex work begins

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with the collection of sturgeon producers, a very

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important moment,

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and the quality of the producers, the degree of

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maturity of their reproductive products depends on the

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final result of the activity of the fish

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farm

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in male factories, the procurement of

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sturgeon producers usually

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begins in April May,

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delivered to the pier of the plant in the slots of the

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producers, the

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fish in these ponds are transported with ore can withstand such a

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water temperature in them will not reach

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close to the spawning temperature, then

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the main work of fish farmers begins, the

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stage of maturity suitable for

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fertilization,

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the game arrives a certain not

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only for a short time, it is difficult to guess,

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but it turned out that the process of ripening of the

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reproductive products of fish can be controlled

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for this purpose on them affects the suspension of the

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hormone of the pituitary gland of the endocrine

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gland by the current of lymph and blood, the hormones of the

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pituitary gland are distributed throughout the body and the

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effect on the organs regulating the

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sexual process accelerates maturation, the

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speed of maturation after

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initiation also depends on

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the temperature of the water,

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taking into account this factor, the moment of

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game readiness can be determined quite accurately by

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this time males are taken away milk

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now it's up to the caviar

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control over its maturation begins

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3-4 hours before the expected

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start of the

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parade the

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amount of game received depends on the

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weight of the sled

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200 kilogram beluga gives approximately

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800 thousand eggs of

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average weight sturgeon 250,000 stellate sturgeon

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150,000

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it is better to water the caviar with a mixture of milk 2 3

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males and and are prepared immediately before

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fertilization by diluting milk with water, they are

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immediately poured into a basin and crawl and

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mixed thoroughly

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only sensitive human hands can be

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entrusted with this work,

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soon after fertilization the game

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becomes sticky so

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that it does not stick together and

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die and and api are glued together river silt is

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not washed with water

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in most fish hatcheries and

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crying is removed in the apparatus of the Yushchenko system;

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these are trays in which

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galvanized iron boxes are installed between the mesh bottom of the

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boxes and the tray house; the frame moves; the

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resulting eddy currents of water

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in the incubators

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contribute to better video aeration; they

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prevent the game from caking artificial

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fish farming allows you to cross

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species that are almost never crossed in nature,

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for example, beluga and sterlet,

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such hybrids develop faster, are more

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viable and therefore more profitable to

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grow as commercial fish, that’s what

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they are already at three years old,

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much larger than sterlet; the

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use of hybrids for

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breeding new breeds of fish is promising, but Let's return to

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our incubator where the

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eternal mystery of the development of life is now taking place soon

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after fertilization and the eggs begin to incubate and

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begin to divide, their development

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proceeds from the formation of the first

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cleavage furrow to the formation of the embryo. In the

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microscope you can clearly observe how the

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most important organ systems are laid in the embryo:

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nervous excretory

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muscular circulatory,

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finally the embryo is formed breaks the egg

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shell and leaves them turning into a

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larva. The

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duration of incubation of sturgeon caviar,

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depending on the water temperature, is from 4

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to 10 days. The

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larvae are calculated, weighed,

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their average weight is determined,

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and then in cannes they are sent to concrete

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pools, the

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water in them is flowing filtered,

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each pool places 20 25 thousands of

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larvae at first do not use the supply of

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nutrients of their yolk

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sac,

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but soon they will need the forms of old

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Oleg gray

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at the factory they are bred specially in old

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concrete pools

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for feeding the larvae the smallest

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crustaceans

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or newspapers are grown in boxes with

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garden soil, which is maintained at a

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certain humidity, the

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soil is introduced and food

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and

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and

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to feed the fry it is necessary to select the

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worms along with the soil, they are poured out onto

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a chair under a bright light hiding from it

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deeper and deeper

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Oleg hits finally end up in the tray

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became a

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blog

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finely chopped League of Hittites stirred in water

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just like the old excellent food for

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fry Sturgeon fry

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care, however, is not

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limited to feeding; the pools in

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which they are reared are

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regularly and thoroughly cleaned;

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with another method of rearing, the so-

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called labor method, instead of concrete

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pools, mesh weaves are used, as

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in the pools they are placed in; the ones that

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have just peeked out are treated here; they will go through the

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stages of yolk feeding and will move on. and,

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moreover, without any additional

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feeding for active feeding and will be

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released into the ponds a

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few days before this, the pond

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is filled with water so that the feeding organism

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and fluttering here do not have time to

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outgrow. It

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should be said that

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keeping the larvae in mesh cages

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does not provide such a high percentage of

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survival as in pools, but but it is less

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complex from a technological point of view, does not

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require the construction of workshops

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for the cultivation of live food,

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after the transition to active feeding,

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larvae from cages are transported for

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cultivation into a pond and

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food in such ponds with an area of 2 hectares

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is enough for 100-120 thousand fry of beluga

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sturgeon and 150 thousands of stellate sturgeon fry,

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regardless of whether they were

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raised in cages

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or how these fry lead an almost natural lifestyle in the pool and grown ponds

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and gradually become juveniles that look

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similar to their parents, monitoring its

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development and growth, fish farmers control the

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amount of food in the ponds and add fertilizers in the water

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check the oxygen content take

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biological hydrochemical samples of the water

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growing fry in ponds lasts

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35-40 days up to three or more grams

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control catching inspection weighing

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will show its readiness for independent

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life what could be released

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but how many predators are waiting for the fry in the

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canal and at the exit it will be bypassed into the river, a

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hammer will be released by it, a discharge

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canal or into the river

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directly from the plant and will be dispersed

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locally and fattened at sea,

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the efficiency of fish farming will

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significantly increase the

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last journey on wheels, a

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specially equipped live fish

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transport

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course at sea in the

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Soviet Union, much attention is paid to the

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development of artificial reproduction of

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fish the number of stocks in the sturgeon

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seas is growing; the task now is to make this

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growth more and more significant; to turn the

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Caspian Sea of Azov mainly

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into sturgeon reservoirs. 15 fish hatcheries already operating and

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new ones being built in our country

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will allow us to solve this important

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national economic problem;

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years will pass with honor; fish not grown in the waters of

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beluga and stellate sturgeon. go back to your

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native century

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and

Description:

По заказу Центрального НИИ информации и технико-экономических исследований рыбного хозяйства СССР. Нижне-Волжская студия кинохроники. Режиссер: А. Софьин. 1971 год.

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