fa Treatment stategies with herbal or others Treatment stategies with herbal or others پژوهشي Original research papers <p style="text-align: justify;">The study was performed to examine the efficacy of ginger (<em>Zingiber</em> <em>officinale</em>) extract on growth performance, biochemical and hemato-immunological parameters in juvenile beluga (<em>Huso</em> <em>huso</em>). Fish were divided into 4 groups before fed diet for 8 weeks with 0.5%, 1% and 1.5% ginger extract and with unsupplemented commercial diet as the control. Results showed that there was a significant different in weight gain in fish fed ginger extract diet compared to the control (P<0.05). There were no significant differences in condition factor, feed conversion ratios, specific growth rate and survival between juveniles fed control and ginger extract supplementation (P>0.05). In addition, there were no significant differences of RBC, WBC counts, Hct, monocyte, lymphocyte, neutrophil, eosinophil, glucose, TPP, triglyceride, lipid and globulin levels between the treatment groups (P>0.05). Furthermore, alternative complement activity (ACH50), serum total immunoglobulin (Ig) and lysozyme activity were significantly increased in 1.5% ginger fed fish (P<0.05); however, it did not change the SOD activity, significantly (P>0.05). Therefore, the results suggest that by using 1.5% this extract there will be an improvement in hemato-biochemical parameters and immune function of juvenile beluga.</p> ginger (Zingiber officinale) extract, growth, hemato-biochemical, immune response, Huso huso 26 46 http://ijaah.ir/browse.php?a_code=A-10-35-43&slc_lang=fa&sid=1 AH Vahedi 10031947532846001610 10031947532846001610 No Department of Fisheries, Azadshahr Branch, Islamic Azad University, Azadshahr, Iran M Hasanpour 10031947532846001611 10031947532846001611 No Department of Fisheries, Khazar Institue of Higher Education, Mahmoud Abad, Iran R Akrami 10031947532846001612 10031947532846001612 Yes Department of Fisheries, Azadshahr Branch, Islamic Azad University, Azadshahr, Iran H Chitsaz 10031947532846001613 10031947532846001613 No Department of Fisheries, Azadshahr Branch, Islamic Azad University, Azadshahr, Iran