Siberian sturgeon photo and description, appearance and nutrition | Red Book

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Siberian sturgeon (lat. Acipenser Baerii) is one of the most valuable varieties of fish for fishing. Especially valuable caviar, but also sturgeon meat.

It is worth considering these fish more in detail to study their features and appearance. They look like mysterious creatures from fairy tales and legends. Average life up to 70 years.

Appearance

Is a fairly large representative in his family. Previously, the caught specimens weighed about a hundred kilograms, there were even cases of a catch of a Siberian sturgeon weighing about two hundred kilograms. In those days, fish of this size and volume could not be surprised.

The mass of modern sturgeon is not more than 35 kg, while the limit length is about 3 meters. His closest relatives, beluga, are much larger and longer than sturgeons. An interesting fact that the scales are not covered by the whole body of the fish. There are rows of bone beetles in the body, among which:

  • One with clear outlines;
  • Another, larger, on the back;
  • In the form of a rhombus;
  • Side bugs;
  • Abdominal.
  • The head of an elongated shape. The mouth is located in the lower head. Sturgeon is a bone-cheerful fish combining the features of all representatives. However, from a taxonomic point of view, sturgeons belong to bony fish.

    Where he lives

    Inhabit large rivers flowing into the seas and lakes. Most sturgeons live in Eurasia, but individual subspecies were found in the Mongol and Kazakhstani waters and off the coast of China. In the rivers of Siberia lives the West Siberian subspecies of the sturgeon, its habitat River Ob.

    Lifestyle

    Males begin to reproduce offspring at the age of nine years, and females from 10-12 years old. They are waiting for puberty before starting to regularly reproduce their offspring. Accordingly, sturgeon growth has been taking place for a long time. In males, reproduction occurs every three years, and in females only once every five years. Siberian sturgeon is practically not in sea water, fresh reservoirs remain a favorite place. Sexually mature individuals rush up upstream, and those that live in the lakes rush on the road along the river or do not leave the lake at all. Sturgeons can overcome the distance of up to hundreds of kilometers to the place of spawning.

    For propagation, choose a terrain with a rapid course and with a coarsegrained sandy bottom, where thousands of eggs are put off. Caviar is attached to the stones and rocky protrusions. This type of fish loves darkness and darkened places, so he prefers to fall to a sufficient depth.

    Listed in the Red Book

    In Eurasia, it is an object of fishing since ancient times. During the USSR, fishing reached giant scope, after half a century the number of individuals decreased by more than 90 percent. On the banks of the Ob River, where the maximum number of Siberian sturgeon lives, this indicator is even higher.

    In the period of growing up, young individuals are subject to many threats, as a result of which their number is not restored even after the adoption of significant measures to reduce catches. In the middle of the 20th century, steps were taken to increase the population due to the fact that the Siberian sturgeon was massively produced in some reservoirs of the European part of Eurasia, located in the Gulf of Finland and on Lake Ladoga. However, these attempts did not lead to anything.

    The negative impact on the reproductive function of the sturgeon females cause disorders in the protection of the environment, this applies to heavy metals in water. And hydroelectric power plants make their migration impossible. Currently, many types of this family are artificially bred in special farms.

    The erected dams, poaching and environmental pollution are important limiting factors in the growth of sturgeon population population. Most of the types of sturgeons all over the world are threatened with complete disappearance, and the Siberian sturgeon including.

    What eats

    Belongs to the bottom seeds, choosing food at the bottom. Uses bottom organisms (crustaceans, worms, mollusks, larvae, as well as a number of insects living in water) and swallows a massive amount of river soil. In Baikal, it feeds mainly with small fish. In the Yenisei Gulf eats some insects (Mesidothea sibirica), and in the Yenisei brilliant larvae, mollusk and insect larvae.

    In addition to invertebrates, sturgeons in the stomach sometimes have different larvae. In the winter, when there is little food, fish fall into a peculiar hibernation and eat nothing. The fish caught at this time were with empty stomachs.

    Enemies

    For carp and other types of fish caviar and larvae of the Siberian sturgeon are a favorite treat.

    Interesting Facts

  • Sturgeons were and remain the most valuable commercial fish, both due to special taste qualities of meat, and due to black caviar. Black caviar is considered one of the most famous and expensive delicacies. Interestingly, the taste of sturgeon fish icicles increase as the fish itself ripens. The most valuable in the world is black caviar, owned by white sturgeon, worth hundreds of thousands of dollars per pound.
  • “Fire”- the name of the hybrid young Siberian sturgeon and sterlet. Differs in small size, small mass, excessive bony, but brings a large amount of caviar.
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