NATURAL SCIENCES

Journal of fundamental
and
applied researches

The reproductive function evaluation of domesticated female belugas matured in the cages and ponds for the first time

2015. №1, pp. 82-88

Tyapugin Vasiliy V. - post-graduate student, Astrakhan State University, 1 ShaumyanР° Sq., Astrakhan, 414000, Russian Federation, ikr_tyap@mail.ru

Kashcheeva Anastasiya N. - post-graduate student, Astrakhan State University, 1 ShaumyanР° Sq., Astrakhan, 414000, Russian Federation, predvestnik13@mail.ru

Vasileva Lidiya M. - D.Sc. (Agriculturae), Director, Research and Education Center “Sturgeon culture”, 14a Volodarskogo Str., Astrakhan, 414000, Russian Federation, bios94@mail.ru

Astafyeva Svetlana S. - Ph.D. (Biology), Senior Reseacher, Research and Education Center “Sturgeon culture”, 14a Volodarskogo Str., Astrakhan, 414000, Russian Federation, astafyeva78@mail.ru

The formation of the sturgeon productional stocks in controlled conditions is a formula for success of the sturgeon breeding in the country. The article dwells upon the reproductive functions of the domesticated female belugas matured in the different conditions for the first time such as ponds and cages. It is shown that the terms of the second maturing were lesser when they were cultivated in the cages. The effective breeding power and the amount of caviar of female belugas was higher when they were in the cages than in the ponds. The eggs size, evaluated by the oocytes quantity per gram and the caviar breeding efficiency were about the same in the fish kept in the ponds and cages. However, the biomass growth rate of domesticated female belugas kept in the ponds was higher than those that were kept in the cages. The results show that the fish-breeding and biological characteristics of the female belugas, which became matured in the cages, were better than in the ponds.

Key words: осетроводство, репродуктивные функции, доместицированные самки белуги, пруды, садки, сроки повторного созревания, рабочая плодовитость, выход икры, количество ооцитов в 1 грамме, прирост биомассы, sturgeon culture, reproductive functions, domesticated fem