Investigation on the effects of aeration on the survival rate of Acipenser persicus fingerlings on the rearing period on the earthen ponds of Shahid Marjani Sturgeon Farming Complex

Abstract

In order to investigate of aeration apparatus role on survival rate of Acipenser persicus fingerlings on the rearing period, 6 earthen ponds with 2 hectares surface and 2.5 water depth were selected. This research continued by 2treatments of aerated and unaerated ponds with 3 replicates of density 80000, 120000 &160000 induvial of larvae / hectares. Physicochemical factors such as T, Transparency, D.O, Nitrate, PO4, Alkanity, and pH were recorded weekly. Live food biomass and growth rate of fingerlings were estimated weekly, too. Obtained data were analyzed by t-test and ANOVA and Duncan test (P > 0.05). According to results the survival rates of fingerlings in experimental treatments were significantly different. Physicochemical factors of water quality had no differences except the value of DO, during third weeks of rearing period.