Abrauska sprat - what is this fish?Where he lives and eats what?You want to find answers to these questions?Then read the article further.
Description
Abrauskaya sprat - medium-sized fish living in freshwater, of the herring family.The body reaches nine centimeters long.The weight of fish - ten grams.Lives abrauskaya sprat 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 between three to five centimeters.Spawning begins in May and lasts until October.This usually occurs after sunset, at night.The water temperature for a favorable reproduction of at least twenty degrees.
at a time abrauskaya sprat, whose photos you can see in this article, can bring more than thirty pelagic eggs.Their development is very fast pace.From the moment of maturation of the eggs hatched fry to pass not more than twelve hours.Then they fall to the bottom of their own.In the upper layers of the water rises only when they dissolve the yolk sac.Adult abrauskaya sprat feeds on crustaceans.Young fish eat copepods, rotifers, eggs and plant organisms.
Habitat
Often this type of fish found in a private lake Abrau, located near the city of Novorossiysk, Krasnodar Territory.Abrauskaya sprat in the nineties often spawning and bring more offspring.But that all changed with the change of climate, and with the advent of the lake other fish species.Recent bring abrauskoy sprat discomfort, resulting in the death of offspring, and the population is declining sharply.
other subspecies
In Turkey, scientists have found the approximate form of fish for such subspecies as abraulskaya sprat.View pelagic nature.Often found on the surface of the lake.Migrates in a vertical position, typically with the plankton.Happy abraulskaya sprat can be lowered into the depths of the lake, at night, on the contrary, rises to the surface of the water.Why
reduced number?
Until the end of the fifties this type of herring fish considered massive.When catches in the trawl net fell to two hundred pieces.After the nineties of the 20th century the number decreased because of the emergence of predatory fish in the lake.And once instilled in the place of pike-perch, sprat population has declined and did dozens of times.
What is happening with this kind of sprat?
Currently the lake is not protected and is not in a conservation area.Measures to protect the anchovy will not be accepted.In the near future it is planned to conduct a broad survey of the waters of Lake Abrau.If, during the research revealed the presence of sprat, it will assess the size of this subspecies and conduct mandatory cryopreservation genome.
measures to restore the number
Currently, a program, how to conduct a comprehensive study and restore the population of sprat.To do this kind of artificially reproduce, acclimatize it in water or freshwater pond.
temperature of the water in it must conform to that in Lake Abrau.
In order to preserve the appearance of anchovy, it is necessary to reduce the number of predatory fish.First of all, it's perch.
Poachers also play an important role in the life and reproduction of the fish.Because of her cook a variety of dishes and all kinds of snacks.
Today dying abrauskaya sprat.The Red Book of the Russian Federation has already included it in the ranks of the rare species of fish that are and sprat.
Immediate surgery to restore the herring fish of this type can help to save them.
Conclusion Now that you know who this abrauskaya sprat.Photo for illustration purposes are presented in the article.We hope that the information will be useful to you.
