EVALUATION OF ARTEMIA MAXILLOPOD CYSTS IN HYPERSALINE LAKES OF THE ALTAI TERRITORY
The article shows results of hydrobiological research conducted for many years; it characterizes biological raw materials that contain Artemia cysts and identifies factors affecting the quality of cysts. The authors show that control of catching of Artemia maxillopods cysts is the basic factor for getting high-quality feeds with 80-90 % hatching. Production of high-quality feeds for aquaculture and marine culture from diapausing eggs of Artemia maxillopod in hypersaline lakes of the Altai Territory includes preparation of cysts in hyperslaine lakes in summer and fall where gathering can be carried out at the shore, along the rim, on the ripples, from the water when applying various settlers and baskets and from the central part of the lake when applying floating crafts and pomps; primary treatment, exactly purification of raw materials in the strong brine and disengagement of organic and non-organic impurities; activation of raw cysts considering temperature, humidity and mineralization; drying of cysts after diapausing at 30,0-37,0 ºС to 5-10 % humidity; dressing of dry cysts for final treatment; additional activation and application of hatching activators and hermetic packaging. The researchers identify productive periods of cysts hatching in different stages of water content. The authors observe that clusters of cysts in shallow basins with developed phytal zone are affected by wind-induced currant and emitted to the shorefront. The research has shown the cysts gathered at shallow plots of the Kulundinskoe Lake contain 20-30 % of water and 45-60 % of impurities. Pure product yield is 16-18 %. The research devoted to investigating cysts gathered at shallow plots of the Kulundinskoe Lake in summer has shown that the explored material consisted of inorganic impurities like sand and salines (17 %), shell (16 %), filamentary algae (13 %), remnants of Scatella subguttata mummies (10 %) and obsolescent Artemia maxillopod (8 %). The cysts contained 28 % of water. The authors forecast Artemia yield for cysts in the Kulundinskoe Lake in October-November.