اثرات سطوح متفاوت بر بيوتيك اينولين جيره غذايي بر شاخص هاي رشد، تغذيه، نرخ بازماندگي و تركيب بدن فيل ماهيان HUSO HUSO LINNAEUS.1754 جوان پرورشي

Effect of different dietary prebiotic inulin on growth performance, nutrition factor, survival and body composition of cultured juvenile Beluga (Huso huso Linnaeus, 1754)

The use of prebiotics, nondigestible dietary ingredients that benefically affect the host by selectively stimulating the growth of and/or activating the metabolism of health-promoting bacteria in the intestinal tract, is a novel concept in aquaculture. An 8-week feeding experiment was conducted to investigate the effects of dietary prebiotic inulin on growth performance, nutrition factor, survival and body composition of cultured juvenile Beluga tHuso huso). Three replicate groups of fish (initially average weight 16.14±0.38g) were fed diets containing prebiotic inulin levels ranging from 1% to 3%. The basal diet was contained 3% cellulose. The results of linear regression showed there was a negative relationship between some performance indices including weight gain (WG), specific growth rate (SGR), protein efficiency ratio (PER), net protein utilization (NPU), energy retention (ER), feed efficiency (FE), protein retention (PR) and supplementation level of inulin. At the end of trial, in group treated with l% inulin showed a enhaced survival without any significance between treatment (P>O.05), and intestinal lactic acid bacteria (LAB) increased in this group to compare other groups (PO.05). The experiment indicated that the prebiotic inulin didnʹt influence the increase of the growth performance in beluga juvenile and it is not appropriate for supplementation in the diet of cultured juvenile beluga.