THE STATUS OF THE POPULATION OF ARTEMIA IN THE DEPRESSIVE PERIOD IN THE LAKE OF THE GREAT ALERT EDGE OF THE ALTAI

Abstract

Research on hypergalin lakes began in 1977. Commercial interest in Artemia (at the cysts stage) as a starter feed for aquatic organisms served as the basis for monitoring studies of hypergalin lakes in the Altai Territory. Lake Bolshaya Yarovoye is noted as one of the largest bodies of water in the region with a population of toad crustacean Artemia Leach, 1819. Considering the depressed state of development of the Artemia population in the lake Great Spring in the growing season of 2017 (the reservoir productivity was 5.8 kg / ha), monitoring studies were conducted to clarify the status of the productivity of aquatic bioresources. As a result of complex hydrobiological surveys in the spring period (April – May), 2018, the dynamics of indicators of the number of early stages of development of the first generation Artemia crustaceans and cysts in the lake are presented. Big Spring Altai Territory. The analysis of the influence of the temperature and salinity of the water in the spring of 2018 on the condition of Artemia crustaceans and the reservoir productivity was carried out. In the course of monitoring studies of the hypergalin reservoir in April and May 2018, during the development of the first generation of crustaceans, a depressive state of development of the Artemia crustacean population was revealed. The temperature at the beginning of the growing season of the current year was unfavorable for the development of Artemia in the lake, which resulted in low numbers of crustaceans. Given the depressed state of the development of the Artemia population in the lake. In the growing season of 2017, the Great Spring, the extraction of bioresources (Artemia (at the cysts stage)) at the current state of the population can significantly undermine the fishing base of the reservoir and damage the further development of Artemia.