Effect of nucleotide on growth, immune responses and resistance of Macrobrachium rosenbergii (De Man) to Macrobrachium rosenbergii nodavirus (MrNV) and extra small virus (XSV) and Aeromonas hydrophila infection |
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Authors: | R Shankar H Shivananda Murthy H R Sujatha E G Jayaraj C S Tejpal V S Chinthamani |
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Institution: | (1) Department of Aquaculture, College of Fisheries, Karnataka Veterinary, Animal and Fisheries Sciences University, Mangalore, 575002, India;(2) SVS College, Bantwal, DK, Karnataka, 574211, India; |
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Abstract: | A 60-day feeding trial was conducted to evaluate the effect of dietary nucleotide on growth, survival, immunity and resistance
to white muscle disease and Aeromonas hydrophila infection in freshwater prawn (Macrobrachium rosenbergii). The nucleotide was supplemented at 0, 1.5, 2.25 and 3.0 g/kg diet. The test diets were fed for 60 days in triplicate groups
of prawns, which had initial weight of 0.27 g. At the end of the feeding trial, growth was recorded and non-specific immune
parameters, such as, prophenol oxidase activity, superoxide anion production, total haemocyte count and total serum protein,
were studied in haemolymph samples. Phenol oxidase activity and superoxide anion production were significantly (P < 0.05) higher in prawns fed nucleotide-based diets. Total haemocyte count and haemolymph were higher (P < 0.05) in prawns fed nucleotide-based diets. The relative per cent survival of prawn after the challenge test against white
muscle disease was significantly (P < 0.05) higher in prawn fed nucleotide-incorporated diets. However, there was no effect of nucleotide supplementation on
growth and survival of prawn. |
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