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The experience of intensive perennial growing up of fingerlings of noble crayfish Astacus astacus (Linnaeus, 1758) in Belarus
10th Euro-Global Summit on Aquaculture & Fisheries
October 08-09, 2018 | London, United Kingdom

Alexander P Golubev, Anatoly V Alekhnovich, Olga A Bodilovsakaya and Anilkumar Gopinathan

Belarusian State University, Belarus
National Centre of Bioresources, Belarus
VIT University, India

Posters & Accepted Abstracts: J Aquac Res Development

Abstract:

Noble crayfish Astacus astacus is the most valuable commercial species of freshwater crayfish in Europe. But now for many reasons its abundance in many European countries saw a significant decline. The main way to meet the demand for A. astacus is to increase its production through aquaculture. In Belarus A. astacus reaches of marketable size (8-9 cm) at the age of 4 years, whereas in Western Europe, with a warmer climate it attains such dimensions one year earlier. Therefore the openair A. astacus aquaculture in Belarus will be less profitable than those in Western Europe; we conducted an experiment on the year-round rearing up of newly born A. astacus. Initially new-born A. astacus were reared at different densities in summer in open-air fishing trays for 3 months (early of July - early October) and after that in laboratory room in aquaria for 6 months (early October - early April). The water temperature in trays varied from 25C in the summer to 12C in the autumn, and at winter rearing ??? in the limits of 18-20C. At summer and winter growing period, the survival of young in different trays and aquaria varied in the limits 29-38% and 50-80% respectively. The average body weight of specimen in both stages of rearing did not differ significantly with the density of rearing. At the end of winter rearing (the age approximately 10 months) the weight of specimen varied in the limits of 668-939 mg. The A. astacus juveniles in natural reservoirs in Belarus reached the similar weight by the end of the second year of their life. Thus, winter growing up of A. astacus yearlings allows reducing the age of achievement of marketable size of from 4 to 3 years. It allows to reduce significantly the financial cost for A. astacus aquaculture in Belarus.

Biography :

E-mail: [email protected]