About 30 thousand different species of fish live in the oceans. Every year hundreds of more species of new and unknown underwater inhabitants open every year. Almost 10 percent of all together are commercial fish. At the beginning of time, people actively used fish for cooking. At the moment, fish farming has become one of the most popular sectors, the economy of many countries. Almost one sixth of the protein is provided by fish. This indicator may vary depending on the regions. In places where there are seas, this indicator increases.
Description of fishing fish
Complex fish are those types of fish that are objects of catching. In particular, it is amateur fishing, when the main goal of catching is to eat fish for a private person or the use of fish as raw materials for fertilizers, making fats and so on. Since ancient times, many peoples of the North have used the skin of marine inhabitants to create clothes, shoes and bags.
On a large scale, various enterprises are caught by fish, which are sold on a large scale. The caught fish can go not only to meat, but also for various medicines, technical fertilizers and fats. For example, artificial pearls are made from scales.
Thus, fishing fish is the one that can be used in various sectors of industry. However, in order for the animal to be fishing, a stable and solid number of fish population, as well as a constantly high demand, is necessary. The maximum bar of fishing by mining enterprises is annually approved by state regulatory authorities.
Types of fishing fish
Beluga
Siberian sturgeon
Russian sturgeon
Stellate sturgeon
Thorn
Salmon
Champs
Keta
Pink salmon
Red salmon
Kizhum
Nelma
Whitefish
Omul
Trout
Smelt
Carp
Carp
Bream
Asp
Roach
Vobla
Sprat
Sardins
Tulka
Seld Pacific
ATLANTIC herring
Baltic herring
Herring Azov-Black Sea
Navaga Severnaya
Haddock
Men (burbot)
Pacific cod
Black Sea mackerel
Atlantic mackerel
Classification of fish
Fisheries can live both in seas and in small reservoirs. According to this criterion, they are classified by sea fishing fish, freshwater fishing fish, passing and semipassage fishing fish. Consider each type in more detail.
Sea fishing fish
The largest number of fishing fish live in the seas. Almost 87 percent of the total fish diet falls on precisely sea fish. They live and multiply in salty waters. Various coldloving species live in the northern seas, such as sea perch, cod, herring and flounder, and in warm heatloving species, which include sair, mackerel, herring and betrica. These fish can also be subdivided into pelagic and bottom. Pelagic live on the surface of the sea, and bottom at a depth. Most red fish prefer to live on the surface of the seas. Dona fish include fish with light meat.
Freshwater fish
These varieties of fish live all their lives exclusively in rivers, ponds or lakes. They are about 11 percent of the entire catch. The most valuable freshwater fish are carp, perch and somic representatives. The largest freshwater individual is the Chinese Psefurus, which reaches about 7 meters in length with a weight of 1 ton. Part of the freshwater is bred artificially. This applies to fish such as trout, carp, carp, silver carp and a number of others.
Passing and semipassage fish
These fish representatives differ from the above in that they feed and grow in the seas, and multiply in the rivers.
Passing fish is characterized by very long travels from the place of feed to the place of reproduction. Sometimes this distance can be several thousand kilometers. Direct reproduction in passing fish occurs in the upper river. The fish themselves are considered very valuable, since their composition contains a large number of useful fat. Such fish include the following families: salmon, sigo, sturgeon. They live mainly in the waters of Europe, America and Asia. Some of the herring are found in Southern Europe, South Asia and some moderate waters of America and North Africa.
Semipassage are distinguished only in that they do not go far into the seas and do not rise low in the rivers. These include a number of species from the Karpov family, namely Vobla, Eastern Red Power, Usach and Chekhon, as well as a representative of the perchfishing family Sudak. They live mainly in the moderate waters of Asia and southern Europe.
