Dietary effect of different thiamin levels on the growth performance, body composition, and hematological parameters of Beluga (Huso huso) in low and high-fat diets

Authors

Department of Fisheries, QaS.C., Islamic Azad University, Qaemshahr, Iran

10.22092/ijfs.2025.134637

Abstract

The present research evaluated the effects of dietary thiamin levels in low and high-fat diets on the growth performances, body composition, and hematology of Beluga (Huso huso) juveniles. A total number of 480 juveniles with an average weight of 44.98±1.96 g were distributed in 24 tanks and fed with diets containing 180 g/kg fat (high-fat, HF), 180 g/kg fat+7 mg/kg thiamin (HF-7B1), 180 g/kg fat+15 mg/kg thiamin (HF-15B1), 180 g/kg fat+25 mg/kg thiamin (HF-25B1), 90 g/kg fat (low fat, LF), 90 g/kg fat+7 mg/kg thiamin (LF-7B1), 90 g/kg fat+15 mg/kg thiamin (LF-15B1), 90 g/kg fat, 25 mg/kg thiamin (LF-25B) for 8 weeks. At the end of the feeding trial, five fish from each tank were randomly sampled and the blood samples were collected to evaluate hematological parameters. The results showed that dietary fat and thiamin levels had no significant interaction effect on the final weight, weight gain, specific growth rate, feed conversion rate, and survival rate (p>0.05). The fat had a significant effect on growth performance and high-fat diets substantially increased final weight, weight gain, and specific growth rate compared to low-fat diets (p<0.05). Different thiamin levels had notable differences in the growth performance in low and high-fat diets and growth significantly were higher in fish fed with thiamine compared to control group (p<0.05). The interaction effect of fat and thiamine on body composition was not significant (p<0.05). The effect of fat on protein is significant and beluga fed with high-fat diet had a higher protein content than beluga fed with the low-fat diet. There were significant differences in WBC, Hb between treatments and the highest level was obtained in HF-15B1 and HF-25B1 (p<0.05). The results showed that diets supplemented with thiamin improved growth performance, body composition, and hematology index in beluga sturgeon.

Keywords

Iranian Journal of Fisheries Sciences
Volume 24, Issue 6
November 2025
Pages 1429-1438

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