As for the rightness of common classification of chub to the group of less valuable fish, we should, in your own interest, express some doubts. To what extent this classification is correct, we will assess the causes, which conditioned them. Until we find reliable evidence, however, let's try to look at these features of chub together, which could lead to granting him a more honorable rank.
We should highly appreciate chub if only for this reason, that he is willing to fix it, what we've broken. It means, that it is willing to populate even polluted watercourses, thoughtlessly regulated or marked by other civilization diseases. In many waters, the situation has become so much more acute, that "canary."” long ago escaped us, and the "sparrow in hand" function” must now perform just chub.
Indeed, the adaptability of this fish knows no limits or obstacles, and the area of its occurrence ranges from the lowlands to the high waters - do 1500 m n. p. m. The chub quickly settles at any altitude, in all types of flowing and standing waters.
Sub-mountain streams and rivers with a rich natural shape of the channel can be considered the optimal living environment for this timid and motionless fish., in which there are alternately uniform sections with a strong current and gravel bottom and deep bends, in which there are many hiding places, especially in the labyrinths of coastal plant roots. This type of environment gives the chub everything, what I need: she's well oxygenated here, good quality water, the right choice of benthic food and spreading to the surface, and in the nooks of the deep, he can feel safe. In this type of waters, the chub comes to the fore and has a decisive influence on the composition of the fish stock; its share reaches 30-50%.
Omnivorous chub can be caught with a variety of lures:
A – fruit can be attached to a hook by threading it with a fishing needle B – Knead the crust only partially, on the shank of the hook – to make it look natural.
The caution of the chub and its habit of hiding must be properly understood: it does not need a hiding place as an end in itself, and if it does not have to, he doesn't look at her. The right place in its vicinity, however, is a condition for a sense of security for chubs. He only looks for shelter in an emergency, in other cases it is always outside, at one of your favorite feeding sites – basically everywhere, where there is food abundance. Once it can be just below the surface, where it expects an influx of goodies from trees or banks, some other time – especially after dark – chubs gather on the border of currents and still waters. They search the shallows at night, they like stretches when the water level is high, where are the reverse currents, near urban agglomerations, they willingly stop at the mouths of canals, etc.. When the chub is looking for food, even the tiniest speck in its wide field of view will be noticed. It does not hesitate to float from the bottom to the surface due to the water-floating trifle, just to satisfy my curiosity. O ile to, what he sees is suitable for eating, will be consumed by him.
The enormous vitality of the chub is undesirable in some cases. We are especially reluctant to accept his efforts to gradually take control of the lower sections of the land of trout. We welcome him in the other waters.
Sexually matures in 3.-4. year, spawning takes place in groups. In the lowlands, it even happens at the end of April, generally, however, only in May, and in the piedmont waters in June. It can also find spawning conditions in the main watercourse, however, it prefers clean rocky tributaries, it can even spawn on grass.
Chub should also be respected because of its omnivorous nature; it would be easier to name it, what he does not eat than present his typical menu. In his youth, understandably, it feeds only on tiny planktonic organisms, However, his "culinary taste" will barely grow a bit” it becomes more universal. All benthic organisms available to it can be listed as typical food for chub, and also crayfish, frogs etc.. and insects, falling to the surface of the water. Adult chub even craves rotting detritus, soft water plants, eats with appetite various types of soft fruit, etc.. After reaching 15-20 cm long begins to eat fish gradually, and his predatory tendencies are becoming clearer. He has an irrepressible appetite also in winter, when most of the fish like him don't think about eating at all.
The weight gain of chub is relatively slow, co – when its foraging activity is taken into account – there is no rational explanation at first glance. The reasons for this must most likely be sought in mutual food competition, which is always significant in group fish. In most flowing waters, chub can reach 1 kg of weight only in 10. age. Individuals weighing approx 1,5 kg have at least 15 years, and the age of real weighing specimens 5-6 kg we do not even try to guess. You can suppose, that bigger chubs, who tend to choose predatory diet, They are characterized by much faster body gain. This is e.g.. with aches and there is no reason to judge, otherwise it is with chub.