commercial fish whitefish prized for great taste and high nutritional quality.Fish is a member of salmon and is found in the cold waters of the northern countries.Whitefish inhabits the waters of Canada, Alaska, northern Europe and Siberia, where the climate, food and water are completely different from here - a large number of subspecies of fish.Particularly the many and varied fish whitefish family in Russia.
Despite belonging to a single biological species, whitefish divided by lifestyle and morphological characters.Even within a single fish pond may have differences in appearance, size, nutrition, development, taste the meat.
The Russian fish whitefish kind is widespread, both in the European part and Siberia.It lives in almost all rivers flowing into the Arctic Ocean, and Lake Baikal.On the territory of the European whitefish is found in Onega, Lake Ladoga, Lake Peipsi, and the Curonian Gulf of Finland.Especially a lot of fish in the Karelian reservoirs.
There are lake whitefish, river, walk-through.Lake and river and spawn are found only in lakes and rivers.Globe live mostly in lakes, and go to the river to spawn.Some representatives of the anadromous whitefish can live in salt water.They live in the sea, usually at the confluence of the rivers in it, where a lot of food, and the water is not too salty, and spawn ascend rivers.Was born juvenile anadromous fish lives in the river throughout the year.
Sigi differ in the number of gill rakers on the arc, which is located near the mouth.There are three varieties: malotychinkovye, srednetychinkovye, mnogotychinkovye whitefish.
whitefish have found three types of provisions of the mouth: the upper mouth upwards, the end - forward, lower - down.Different subtypes and different contours of the body.In some it is smooth and streamlined, while others - angular, the third - with a hump or swollen breasts.
virtue of morphological features in the diet of whitefish, belonging to different subspecies, there are differences.For example, fish kind of whitefish with a small number of gill rakers can not eat plankton due to the inability to filter it, so it prefers benthic invertebrates.Mnogotychinkovye whitefish eat mainly plankton.
Fish, whose mouth is directed upwards, is usually not large, they feed on small organisms that live in the upper water layers.Sigi, whose mouth is directed forward, a large, eat crayfish, young, caviar fish, insect larvae.
Weight smallest whitefish is less than one hundred grams, and the largest can weigh more than eight kilograms.Depending on the species, fish sig does not grow equally.There are fast-growing and slow-growing form.Different subspecies of whitefish in numbers.There are species whose populations are very numerous, while others, on the contrary, are on the verge of extinction and protected by law.
Whitefish endowed silver (females yellowish) uniform color, toothless mouth, flat sides, fairly large scales, white meat.Fish Whitefish does not change before spawning their color, only the males in the body there is a "pearl" placer.In males, unlike females, a long body and small scales.
Most subspecies of whitefish spawn in late autumn in cold water.At the end of the summer before the start of spawning whitefish climbs up the river far enough.It reaches spawning months.Typically, these parts of the river have little current, shallow depth and sandy bottom.After spawning whitefish does not die, as is the case in salmon, and returned for permanent habitation.
Thanks tasty meat and high-fat fish whitefish is a valuable food product.Fish contains useful amino acids and minerals, iodine, fluorine, zinc, chromium, iron and phosphorus.Fat whitefish well digested and absorbed by the body, is not harmful to the stomach, is rich in essential vitamins for the human A, D, PP.
