Every water pool on the farm, at least it was built for a different need, you can always simultaneously be used for breeding fish. With some attentiveness and care works for nothing will never disappear. If you are inside of ownership of a lake, right by the settlement of his juveniles you can increase the amount of fish, and consequently, and profit from it. In the pond gully on the steppe, you can make no ex-here before fish. From flowing through your ownership of the river you can divert water to the lowland, where to arrange a number of ponds for proper fisheries management. Ponds can be constructed in a meadow, but more often they lay in wastelands, swamps, etc., unfit for any other purpose and are quite suitable for ponds. Subsequently, the bottom of the ponds, which fish usually do not deep, turn in arable land: the silt deposited from the water, is an excellent fertilizer, and this gives the pond a few years a fine crop of oats and other breads. On the other hand, if after harvesting of oats to fill the pond with water again, bred in a pond rich in food for fish, causing it to quickly feed that the farmers just need more. Continue reading
Perciformes (lat. Perciformes) — a detachment of the class of bony fish. There are over 6000 species and about 150 families. Characteristic features: part fin rays has the form of undifferentiated acute spines, pelvic fins are usually located under the breast and sometimes in front of them; swim bladder not connected with the intestine.
The squad is part of the Perch family (Percidae), with 160 species, many of which have important commercial value. In particular, the Zander (Lucioperca), several species of which live in the basins of the Black and Caspian seas. Some of them live permanently in rivers, others in the seas, others are semi-anadromous fish coming from the rivers into the sea. Perch (Perca) are widely distributed in the rivers and lakes of Russia. Are also objects of the fishery.
The family of Labyrinth fishes (Anabantidae) is a kind of fish, characterized by the presence of saccular outgrowths of the Gill cavities, which are used for temporary breathing air. These fish, such as anabas (Anabas testudineus), often come out to shore and even climb trees. They live in fresh and brackish waters of tropical Africa, Asia and the Islands of the Malay archipelago. Some species, such as gourami, are used as aquarium fish. Continue reading
Our planet is inhabited by almost 20 thousand species of fish. About 1/10 of them are commercial. They give people a lot of valuable products: food, medicines, fertilizers for the agriculture, pet food, industrial oils, raw materials for light industry.
To move in the water, have to spend a lot of energy. Nature took care of the fish, giving their bodies zaradougou streamlined shape. The speed of the fish (scombridae, tuna, sharks) in its form and speed resemble that of a torpedo. The fastest fish is considered fish-sailfish, swordfish and Marlin, which reach speeds of up to 130 km/ h. The rate of freshwater fishes is typically lower, but in critical moments of his life, in the moment of impending danger or in the event of an attack on their prey, they can take a short term shot at a speed of 1-2 km /h. Good speed swimmers usually are found in rivers with current (sabrefish, Chub, nase, Dace, salmon). The speed of the fishes living in stagnant water far below, but they are more nimble, nimble (carp, bream, Rudd). Continue reading