therefore it is used in terms of commercial cultivation, beser was first proposed by professor mikhalyukince the year sixty-eight, it is considered the first object for commercial grow. the thorn is one of the species of indigenous fauna of the caspian sea, the population of which is, in principle, on the verge of complete extinction. kaluga , currently here in the pools, is the largest fish and... it was offered to us in order to try to what extent it could exist in our fish-breeding zone, this is the fish that was acclimatized with us in the soviet union, back in brought to russia from america, it has taken root very well here, we believe this is the most important fish of the caspian the sea, the population of which has always produced large quantities on an industrial scale, has produced large, so to speak, catches. reproduction of fish is a technically complex and costly matter , just what does it cost to heat water in giant pools, for example, here there are 500 small fish ready to be released into the sea, each weighing from 3 to 5 g. how many of these small fish are released in kas