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:: Volume 7, Issue 4 (winter-2020 2020) ::
JAIR 2020, 7(4): 64-78 Back to browse issues page
Effect of bacterial single cell protein in rainbow trout (Oncorhynchus mykiss) diet on body composition and digestive enzymes activity
Abbas Zamani Dr. *
Abstract:   (135 Views)
In this study, body composition and digestive enzymes activity was assessed in rainbow trout fry (weight 2.51 ± 0.55 g) fed by bacterial single cell (BSC) as a dietary protein source replaced with fish meal as completely randomized design with triplicate for 6 weeks. Experimental diets were prepared in 5 treatments as isonitrogenous with different levels of fish meal and BSC (100% fish meal (A), 75% fish meal and 25% BSC (B), 50% fish meal and 50% BSC (C), 25% fish meal and 75% BSC (D) and 100% BSC (E)). The body composition findings showed that the highest amount of lipid and protein and the lowest amount of moisture and ash was revealed in fish fed by diet C while the lowest amount of lipid and protein and the highest amount of moisture and ash was observed in fish fed with diet E (P <0.05). Enzymatic assessment from pyloric caeca and intestine were showed that trypsin and α-amylase were increased significantly in fish fed by diet C while alkaline phosphatase activity had the highest amount in diet D than did that from diet E (P <0.05). Based on the results of this study, it is recommended that BSC could be properly replaced up to 50 % with fish meal in rainbow trout fry diet.
 
Keywords: Single cell protein, body composition, trypsin, rainbow trout
Full-Text [PDF 705 kb]   (25 Downloads)    
Type of Study: Research | Subject: Special
Received: 2019/10/9 | Accepted: 2019/12/2 | Published: 2020/05/17
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Zamani A. Effect of bacterial single cell protein in rainbow trout (Oncorhynchus mykiss) diet on body composition and digestive enzymes activity. JAIR. 2020; 7 (4) :64-78
URL: http://jair.gonbad.ac.ir/article-1-674-en.html


Volume 7, Issue 4 (winter-2020 2020) Back to browse issues page
نشریه علمی پژوهشی پژوهشهای ماهی شناسی کاربردی Journal of Applied Ichthyological Research
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