Valuable fishfish

Fishing fish whitefish is appreciated for its excellent taste and high nutritional qualities. Fish is a representative of salmonids and occurs in the cold waters of all the northern countries of the world. Sig dwells in the waters of Canada, Alaska, Northern Europe and Siberia, where the climate, water and food are completely different, hence - a large number of subspecies of fish. Especially numerous and diverse fish of the whitefish family in Russia.

Despite belonging to a single biological species, whitefish are divided according to lifestyle and morphological features. Even inside one pond fish Can have differences in appearance, size, nutrition, development, taste of meat.

In Russia, the fish of the genus Sigova is widespread, both in the European part and in Siberia. It lives in almost all rivers flowing into the Arctic Ocean, and in Lake Baikal. The European territory is found in the Onega, Ladoga, Chudskoye lakes, the Curonian and the Gulf of Finland. Especially a lot of this fish in the Karelian reservoirs.

They sing out lake, river, river passages. Lakes and rivers are found and spawn only in lakes and rivers. Passage live most often in lakes, and go to rivers to spawn. Some representatives of the entrance whitefish can live in salt water. They live in the sea, usually at the confluence of rivers, where there is plenty of food, and the water is not too salty, and spawning rises up the rivers. The juvenile fish that have been born live in the river for a year.

The whitefish differ in the number of stamens on the gill arch, which is near the mouth. There are three varieties: malotychinkovye, srednetichinkovye, mnogotychinkovye whitefish.

Three types of position of the mouth are found in the sigas: the upper mouth is directed upwards, the final mouth is forward, the lower one is downward. Different subspecies differ and contours of a body. In some, it is smooth and streamlined, in others - angular, in others - with a hump or a swollen chest.

Due to the morphological features in the feeding of whitefish, belonging to different subspecies, there are differences. For example, a fish of the genus Sigova with a small number of gill rakers can not feed on plankton due to its inability to filter, so it prefers bottom invertebrates. Many-type whitefish eat, mainly plankton.

Fish, whose mouth is directed upwards, usually small, feed on small organisms inhabiting the upper water layers. Shiga, whose mouth is forward, larger, feed on cancers, young, fish eggs, insects, larvae.

The weight of the smallest whitefish does not reach one hundred grams, and the largest can weigh over eight kilograms. Depending on the variety, the fish does not grow in the same way. There are fast-growing and slow-growing forms. The subspecies of whitefish differ in numbers. There are varieties whose populations are very numerous, while others, on the contrary, are on the verge of extinction and are protected by law.

Shig is endowed with a silvery (in yellowish females) uniform coloration, toothless mouth, flat sides, rather large scales, white meat. Fish whitefish does not change its color before spawning, only males have a "pearl" placer on their bodies. In males, unlike females, a longer body and small scales.

Most subspecies of whitefishes spawn in late autumn in cold water. At the end of the summer, before the spawning begins, the whitefish rise up the river for a considerable distance. It reaches the spawning site in a few months. Usually these sections of the river have a weak current, a shallow depth and a sandy bottom. After spawning, the whitefish do not die, as occurs in salmon, but returns to a permanent habitat.

Thanks to tasty meat and high fat content, fish whitefish is a valuable food product. The fish contains useful amino acids and minerals: iodine, fluorine, zinc, chromium, iron, phosphorus. Fat is well digested and absorbed by the body, it does not harm the stomach, it is rich in vitamins A, D, PP important for human.