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effect of dietary a-max supplementation as a prebiotic on growth performance and hemato- immunological parameters of great sturgeon (huso huso linnaeus, 1758) juveniles
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نویسنده
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akrami r. ,chitsaz h. ,lakzaei f.
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منبع
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iranian journal of fisheries sciences - 2018 - دوره : 17 - شماره : 2 - صفحه:251 -266
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چکیده
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An 8-week feeding trial was conducted to evaluate the effects of dietary commercial prebiotic a-max, a mixture of mannan oligosaccharides, fructo oligosaccharides and β glucan, on growth and hemato-immunological parameters of great sturgeon (huso huso) juveniles. after acclimation, fish (initial weight of 28.79±0.85 g) were placed into 12 tanks (30 fish per tank). fish were fed a basal diet (containing 44% protein and 20% lipid) supplemented with 0 (control), 0.5, 1.0 and 1.5 g kg^-1 a-max in a totally randomized design in triplicate groups. at the end of the trial, growth factors and haemato-immunological parameters were assessed. fish fed 1.5 g kg^-1 prebiotic mixture displayed higher growth performances and feed efficiency compared to the control group (p>0.05). there were no significant differences in survival rate among all treatment groups (p>0.05). the results showed that rbc, wbc, lymphocyte, neutrophil, haematocrit and total protein were significantly affected by 1.5 g kg^-1 dietary prebiotic mixture (p<0.05). an elevation of monocyte and haemoglobin (p>0.05) was found in the fish fed diet containing 1.0 g kg^-1 prebiotic. in addition fish fed the diet with 1.5 g kg^-1 prebiotic mixture showed a significant increase in lyzosyme activity, respiratory burst activity, serum total immunoglobulin (ig) and alternative complement activity (ach50) (p<0.05) compared with those fed the diets supplemented with other levels of prebiotics. the results showed that the addition of 1.5 g kg^-1 prebiotic mixture to the diet of great sturgeon juveniles improving growth performance, some haematological parameters and immune response and seemed to be an effective immunostimulant.
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کلیدواژه
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prebiotic mixture ,growth ,hematology ,immune response ,great sturgeon (huso huso)
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آدرس
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islamic azad university, azadshahr branch, department of fisheries, iran, islamic azad university, azadshahr branch, department of fisheries, iran, iranian fisheries sciences research institute, iran
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Authors
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