Abrauyskaya tulka is that for a fish?

Abrauska tulka - what is this fish? Where dwells and what feeds? Do you want to find the answers to these questions? Then read the article next.

Description

Abrau's tulka is a small fish living in a freshwater environment, from the herring family. The body reaches nine centimeters in length. The weight of one fish is ten grams. Lives abrauyskaya tulka no more than two years. It feeds on small zooplankton.

Reproduction

At the age of one year reaches puberty. The length of the body at this time is from three to five centimeters. Spawning begins in May and lasts until October. As a rule, this happens after sunset, at night. The water temperature for favorable reproduction is at least twenty degrees.

At a time, Abrau's tulka, the photo of which you see in our article, can bring over thirty pelagic eggs. Their development is very fast. From the moment of ripening of eggs to hatched fry, no more than twelve hours pass. After that, they sink to the bottom. The upper layers of water rise only when their yolk sac dissolves . Adult abrau herrings feed on crustaceans. Young fish eat copepods, rotifers, vegetable organisms and eggs.

Habitat

Often fish of this type is found on the closed lake Abrau, located not far from the city of Novorossiysk, Krasnodar Territory. Abrau's tulka in the nineties often spawned and brought great offspring. But everything changed with the change in climatic conditions, and with the appearance of other species of fish in the lake. The latter bring discomfort to the Abrauyskiy tulka, as a result of which the death of the offspring occurs, and the population sharply declines.

Other subspecies

In Turkey, scientists have found an approximate species of fish to such a subspecies, like Abraulian tulka. Kind of pelagic character. Often found on the surface of the lake. Migrations in an upright position, usually with plankton. During the day, the Abraulian tulka can descend to the depths of the lake; at night, on the contrary, it rises to the surface of the water.

Why is the number decreasing?

Until the end of the fifties this species of herrings was considered massive. With catch in the network of trawls fell to two hundred pieces. After the nineties of the 20th century the quantity decreased due to the appearance of predatory fish in the lake. And after the pike perch was planted in this place, the number of tulks did not decrease tenfold.

What is happening now with this kind of tulka?

At the moment the lake is not protected and is not in the protected area. Measures to protect the tulka are not acceptable. In the near future it is planned to conduct a wide survey of the water area of the Abrau lake. If during the research work the presence of the tulka is detected, then it will be possible to estimate the number of this subspecies and carry out the cryopreservation of the genome without fail.

Measures to restore numbers

At the moment, a program is being developed, how to conduct a comprehensive study and restore the population of the tulka. For this, it is necessary to artificially reproduce the species, acclimatize it in freshwater or a pond.

The water temperature in it should correspond to that in the Abrau lake.

In order to preserve the appearance of the tulka, it is necessary to reduce the number of carnivorous fish. First of all, it is a pike perch.

Poachers also play an important role in the fate and reproduction of this fish. After all from it prepare various dishes and everyones snack.

To date, Abrau's tulka is dying out. The Red Book of the Russian Federation has already included it in the ranks of rare species of fish, which are also tulks.
Immediate surgery to restore this type of herring fish can help save them.

Conclusion

Now you know who the Abras tulka is. Photos for clarity are presented in the article. We hope that the information will be useful to you.