Effect of dietary prebiotic inulin on production and intestinal microflora density of juvenile Beluga, Huso huso

Subject Areas : New Technologies in Aquaculture Development

R.  Akrami ¹ (Ph.D. Student, Science & Research Branch, Islamic Azad University)
A.M.  Hajimoradloo ² (Dept. of Fisheries, Gorgan University Agricultural and Natural Resources, Gorgan, Iran)
A.  Matinfar ³ (Iranian Fisheries Research Organization, Tehran, Iran)
A.M.  Abedian Kenari ⁴ (Department of Fisheries, Tarbiat Modarres University, Noor, Iran)
R.  Mazandarani ⁵ (Department of Microbiology, Gorgan University Agricultural and Natural Resources, Gorgan, Iran)

Received: 2019-11-06 Accepted : 2019-11-06 Published : 2008-08-22

Keywords: production, Prebiotic, Inulin, Beluga, Intestinal microflora density,

Abstract :

Use of prebiotics, indigestible dietary ingredients that beneficially 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. Three replicate groups of fish (initially averaging weight and biomass were 16.14 ± 0.38 g and 821.58g, respectively in each group) were kept in 800L fiberglass tanks under homogenous condition and fed diets containing prebiotic inulin levels ranging from 1% to 3%. The basal diet was contained 3% cellulose. An 8-week feeding experiment was conducted to investigate the effect of different dietary prebiotic inulin on production and intestinal micro flora density of juvenile Beluga, Huso huso. The results of linear regression showed there was a negative relationship between production index and supplementation level of inulin. At the end of trial, the density of colony count, yeasts and moulds and lactobacillus count was decreased with supplementation level of inulin. The 1% inulin treatment showed an enhaced survival without any significance among treatments, and intestinal lactic acid bacteria (LAB) increased in this group in comparison with other groups. The experiment indicated that the prebiotic inulin didn’t influence the increase of the production and it is not appropriate for supplementation in the diet of beluga.