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The effects of different levels of dietary prebiotic on growth performance and some non-specific immune parameters in zebra fish (Danio rerio)


 Start Page 49 | End Page 58


 The aim of the present study was to evaluate the effects of different levels of Prebiotic on Growth performance and non-specific immune parameters of Zebra fish. Four hundred and twenty fish (mean weight 45 ± 0. 1 mg) were supplied, randomly stocked in aquaria assigned to four treatments repeated in triplicates and fed with experimental diets contain 0, 0. 5, 1 and 2% Prebiotic for 8 weeks. At the end of feeding trial, Growth performance and feed utilization parameters (final weight, specific growth rate and feed conversion ratio) as well as non-specific immune parameters (total Immunoglobulin, total protein and Alkaline phosphatase activity) were measured. The results revealed that dietary administration of Prebiotic had no significant effect on Growth performance (P>0. 05). Also, the study of non-specific immune parameters revealed that inclusion of 0. 5 and 2% Prebiotic in diet remarkably increased total Ig (P<0. 05). Feeding on 2% Prebiotic significantly increased ALP activity (P<0. 05). Regardless of inclusion level, Prebiotic administration in zebrafish diet elevated total protein levels (P<0. 05). According to these results it seems that inclusion of higher Prebiotic levels (2%) increase non-specific immune parameters in Zebra fish.


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