our planet for millions of years is inhabited by many different animals.Among them is a special type of - fish.They are filled rivers, lakes, seas and oceans.These animals play a big role in the natural food chain, and in the human environment.Both marine and freshwater fish are a food source for people, medicines and fertilizers for agriculture, as well as raw materials for light industry.What are the inhabitants of the rivers of the country, how they survive and what to eat?This issue deserves proper attention for all living organisms on Earth are a necessary link in nature.
Fish rivers of Russia
most common fish that live in the rivers of Russia are the beluga, pike, burbot, catfish, sturgeon, stickleback, bream, salmon, carp, perch, carp, rudd.And this is not a complete list of them.For the fastest river fish include salmon, dace, nase, chub and sabrefish and the most brisk - rudd, bream, roach, bream, tench and carp.These aquatic vertebrates are divided into predatory and peaceful inhabitants.From this division it is directly related and what to eat river fish.The first feed on smaller representatives of this class, and the latter also spend most of their time in search of plankton and plant food.In the waters of Russia, especially in the summer, the rapidly growing variety of seaweed, which are home to crustaceans and molluscs.And it's not just food, but a kind of delicacy for fish.Predators same (eg, pike, walleye, perch), in turn, feed on smaller fish.
largest representative of river fish
Nowadays any freshwater fish, whose length is more than 1.80 meters and a weight of not less than 90 kg, is considered to be large individuals.The record for the largest are several types of aquatic vertebrates.One of them - the white sturgeon.Its weight is 1400 kg, and the length - of about five meters.Not far behind the size of the sturgeon and pike.The largest of its representatives meet in the northern Russian rivers.
European (Common) catfish is weighing about 350 kg and a length of 4.5 meters.He lives in almost all large rivers of both Russia and the CIS.Catfish is unusual in that the body consists of a huge head and a huge tail.
most valuable freshwater fish
Russian River fish have their most valuable items.The most expensive of them is Russian Beluga.Thus, for example, caught in the river Quiet Pine female, weighing 1227 kg, 240 kg gave a very high quality caviar.Its value today is about two hundred thousand dollars.
second most expensive is the carp.It belongs to the category of the most valuable commercial fish.For example, in the seventies, in the delta of the Volga River catch of carp is not less than ten thousand tons per year.
Fish rivers of Primorye
Russia has a vast territory in which the waters inhabited by many different species of fish.Thus, considering the freshwater inhabitants of Primorsky Krai, you can count about a hundred and fifty varieties.Some, such as Sakhalin taimen even listed in the Red Book.Other freshwater fish Primorye can boast the most unusual names - for example, snake catcher, horse-Gubar, zheltoschek and skygazer.In addition to these fish in local waters are inhabited by the Amur fresh pike, catfish, carp, carp, salmon, lenok, and grayling kunzhdy.One of themselves unpretentious and common fish Primorsky Territory is rudd.Although many locals believe it is too skinny, but she's gorgeous taste characteristics.Rudd is of two kinds: melkocheshuychataya and krupnocheshuychataya.Typically, this fish grows to half a meter in length and weighing up to one and a half kilograms.
Fishing in Moscow
For lovers of fishing for many years, Moscow remains a favorite destination relaxation.Amazing nature, quiet evenings, fresh air and plenty of fish in ponds - all you need for a Russian fishing.Rivers Pakhra, Severka, Ruza, Istra, Nerskaya River, Protva, Nara Besputa, Dubna, sister and others to hide in its waters various popular and delicious fish.This perch and carp, and carp and roach, pike and gudgeon, and bream, and chub and bream and chub and bleak.River fish caught suburbs like using fishing rods and using spinniga, fly fishing, boat and tyukalki.
Pike - queen Towns Rivers
Speaking of fish, which are found in Russia, not to mention the character of Russian fairy tales - pike.It lives not only in the waters of our country, but also in the rivers of Europe, Asia and the United States.The size of the pike predetermined forage: the larger the average size of the fishes in the river, the more can grow and pike.It is considered one of the most carnivorous freshwater fish.Its appearance is fully attests to this: a long tapered head with a huge mouth and lots of sharp teeth looks intimidating.Many river fish have become prey to this agile predator.Color pike mostly gray-green with speckles.Due to the slippery cylindrical body, they quickly and swiftly moved.They feed on a pike mostly small fish (roach, perch and others), but often there are cases of eating and individuals of the same species.Furthermore, the diet includes these predators and amphibians, reptiles, insects, and large, and high drop and small mammals, and even chicks waterfowl.
Rare and endangered fish
Today in Russia in the human involvement and care need many river fish, the list of which is increasing every year.These include the Azov beluga, sturgeon, Volga herring, Volkhov whitefish, black carp, white Baikal grayling, Baikal sturgeon, bullhead, Kamchatka salmon and others.All of these fish are on the verge of extinction.Take, for Volkhov whitefish, previously, before the construction of the Volkhov hydroelectric station (1925), played a major role in the fishery, and was driven in large quantities in the rivers Volkhov, Syaz, Svir.
Baikal sturgeon catch in the nineteenth century reached three thousand quintals, and in the nineties of the twentieth century it was reduced to two hundred kilograms.Today, most of the freshwater fish found in Lake Baikal and the rivers flowing into it - the Angara, Kitoe, White, Selenge, Barguzin and Khamar-Daban.A similar fate befell the white Baikal grayling, also previously widespread in these waters.
Another species, endangered, is the black carp.Due to the sharp decrease in the number of fish in the seventies of the last century it has been a ban on its catch.Today, the black carp found in Lake Khanka and in the Amur and Ussuri rivers.
Influence of environmental conditions
Unfortunately, the environmental situation affects the many river systems.Quite often there are cases of river pollution emissions of factories and industrial plants, storm sewage, which include a variety of hazardous chemicals.River fish, crabs, turtles and other inhabitants in such circumstances not only change their way of life, but also the victims of mutations or even disappear.And it is no secret that the insufficient attention from the human society, can lead to irreparable ecological disaster.
