TECHNOLOGY OF GROWING BALKHASH MARINKA (SCHIZOTHORAX ARGENTATUS) OF RECIRCULATION AQUACULTURE SYSTEM

Abstract

The article presents the results of fish-breeding activities that have shown the fundamental possibility of artificial reproduction of the Balkhash marinka in recirculation aquaculture system. The used technology of artificial insemination gave a high result - 80% of fertilized eggs. For females with a high degree of readiness for spawning, a double pituitary injection scheme can be applied. For females with an average degree of readiness to spawn (as in our case), use triple injections, and the interval between the first and second dose is 12 hours, and between the second and third it is advisable to reduce from 36 hours to 24 hours. Embryo hatching began on the fifth day at a water temperature of 18.7-18.8 ° C and a dissolved oxygen content of 8.3-8.7 mg/dm3 (97-100% saturation). The larval period of development of the Balkhash marinka began on 7-8 days from the hatching of the pre-larvae at a water temperature of 19.3-22.0 ° C. When transferring to external nutrition, decapsulated eggs of Artemia crustacean were used as feed.