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Subject: Aquaculture × Author: JYOTI × End date: 2022 × Start date: 2020 × Type: Thesis ×
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    ThesisItemOpen Access
    EFFECT OF DIETARY NONI (MORINDA CITRIFOLIA) ON GROWTH PERFORMANCE, IMMUNE RESPONSE, DISEASE RESISTANCE AND GUT HISTOLOGY OF COMMON CARP (CYPRINUS CARPIO)
    (KARNATAKA VETERINARY, ANIMAL AND FISHERIES SCIENCES UNIVERSITY, BIDAR, 2022) JYOTI; ganapathi naik
    Aquaculture has been growing rapidly for food production in the last few decades. Several commercial fish species have been intensively cultured under conditions of overcrowding or high density, perhaps resulting in a stressful environment and infectious diseases. Fish farmers continue to use large amounts of antibiotics and chemotherapeutics. Continuous use of antibiotics, on the other hand, results in drug-resistant bacteria, bioaccumulation and pollution of the environment. Many medicinal herbs have developed effective defences against pathogenic bacteria and there is growing interest in them as natural antibacterial agents. In this context, the 90 days study was undertaken to evaluate the effect of dietary noni (Morinda citrifolia) on growth performance, immune response, disease resistance and gut histology of common carp (Cyprinus carpio). The basal diet in all trials (30% protein) was incorporated with different levels of noni fruit juice at the rate of 100 ml (T1), 300 ml (T2) and 500 ml / kg (T3) feed respectively in triplicates with control diet (T0) without noni fruit juice. The results showed 100% survival rate in all the groups. At the end of feeding trial T2 showed a significant improved (p ˂ 0.05) improvement in final body weight (FBW), weight gain (WG), specific growth rate (SGR) and protein retention (PR), better feed conversion ratio compared to control group. Superoxide anion production higher in T2 & lysozyme activity wassignificantly higher (p ˂ 0.05) in T2 compared to other treatments. The best protection challenged against A. hydrophila was in T2 with 100% survival rate. In gut histology, all treatments showed better architecture and control groups showed normal villi, villi height and crypt depth.