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Subject: Aquaculture × Author: Maurya, Mitrasen × End date: 2023 × Start date: 2020 × Thesis Type: M.F.Sc ×
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    ThesisItemOpen Access
    Effect of stocking density, salinity & Azolla based feed on growth and survival of Indian Butter Fish Pabda (Ompok bimaculatus)
    (CCSHAU, Hisar, 2023-07) Maurya, Mitrasen; Ahalavat, Shikha
    The present study was conducted to know the effect of stocking density, salinity and azolla based feed on growth and survival of Indian butter catfish (Ompok bimaculatus). The experiment was carried out for 45 days (1st experiment), 45 days (2nd experiment) and 60 days (3rd experiment). In first set of experiment, the fingerlings of O.bimaculatus were stocked under three different stocking densities such as 10 fingerlings/tank (T1), 15 fingerlings/ tank (T2) and 25 fingerlings/ tank. Under first experimental study, the highest weight gain, specific growth rate, and length gain were found in O.bimaculatus at a lower stocking density (10fingerlings/tank) with values of 2.95 g, 1.12%, and 1.10 cm, respectively. The lowest FCR was recorded (1.90) in T1 (10fingerlings/tank) and highest (2.58) was recorded in T3 (25 fingerlings/tank). A 100% survival rate was observed at a lower stocking density of 10 fingerlings per tank, while an 88% survival rate was observed at a higher stocking density. In the second objective of my research work, the survival rates were determined to be 100% in T1 (0.5 ppt), 96.66% in T2 (2 ppt), 63.3% in T3 (4 ppt), and 33.3% in T4 (6 ppt). Additionally, it was observed that weight gain was highest at lower salinity levels (0.5 ppt), while the lowest weight gain was recorded at higher salinity levels (6 ppt). fishes growth declined significantly at 4 and 6 ppt (p≤0.05). Under my research work, the effect of different percent of Azolla diet in combination with commercial feed on the growth and survival of O. bimaculatus was observed in the last experiment. fingerlings of O.bimaculatus were reared under four treatment such as T1(Commercial diet), T2( Commercial diet + 20 % Azolla), T3(Commercial diet + 30% Azolla ) and T4(100%Azolla).Under third experimental study, the highest DWG, ADWG and SGR were found in fingerlings in T2( Commercial diet + 20 % Azolla) with values of 0.29 g, 0.31 g, and 1.75% respectively and lowest in T4(100% Azolla ) with values 0.04 g, 0.04g and 0.39 %. FCR was recorded better in T2(1.61) than T1(1.87), T3 (1.96) and T4(6.61). A survival rate of 83.33% to 96.66% was achieved in the third experiment of my research study, even in the control group and with a 100% Azolla diet. A high rate of survival was observed in both the T2 group and the control group.