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Subject: Aquatic Animal Health Management × Author: Pandey, Shivam × Start date: 2019 ×
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    ThesisItemOpen Access
    Effect of indigenous herbal plants on immunity of common carp (Cyprinus carpio L.) challenge to Aeromonas hydrophila infection
    (CCSHAU, Hisar, 2023-05-22) Pandey, Shivam; Gajender Singh
    This study conducted for 90 days to evaluate the effects of neem and tulsi leaf extracts on immunity and growth parameters of common carp challenged with Aeromonas hydrophila infection. The fishes were fed for 30 days with an experimental diet containing different herbal extracts, including T2 (Basal diet + 5% neem leaf extract), T3 (Basal diet +5% tulsi leaf extract), T4 (Basal diet +5% combined neem and tulsi leaf extract) and T1 (Control diet). The combination of neem +tulsi leaf extract demonstrated the highest antimicrobial activity and minimum inhibitory concentration (0.005%), with the largest zone of inhibition (21 mm). The therapy had a 70% death rate at the maximum dose of 1 ×108 cfu/ml. Overall mean values for all treatments (Mean B) showed a similar trend with T4 having the highest RBCs count (1.68) followed by T2 (1.66), T3 (1.65), and T1 (1.33). All the haematological parameters decreased after infection and WBCs are increased. The mean length gain percentage for all treatments over 30, 60, and 90 days was 13.29%, 14.27%, and 16.01%, respectively. The control group (T1) had the lowest mean weight gain percentage of 72.87%. There were no significant differences observed in the length gain percentage between the different treatments. T4 (5% Neem + Tulsi) had the lowest FCR at all time points, with a mean FCR of 1.95 at 30 days, 6.35 at 60 days, and 2.55 at 90 days. The results also revealed that the treatments applied in T2 (53.33± 3.33%), T3 (53.33± 3.33%), and T4 (70.00± 5.77%) may have a positive impact on the survivability of fish. The mean SGR value for the control treatment (T1) was 0.84, while T2, T3, and T4 had slightly higher mean SGR values of 0.88, 0.87, and 0.90, respectively.