Dietary thiamine supplementation for beluga sturgeon (Huso huso) broodstock: Impacts on sex steroids, reproductive performance, glucose metabolism, and egg quality

Authors

1 International Sturgeon Research Institute, Iranian Fisheries Science Research Institute (IFSRI), Agricultural Research, Education and Extension Organization (AREEO), Rasht, Iran

2 Fisheries Department, Faculty of Natural Resources, University of Guilan, Sowmeh Sara, P.O. Box 1144, Guilan, Iran

3 Inland Waters Aquatics Resources Research Center, Iranian Fisheries Sciences Research Institute (IFSRI), Agricultural Research, Education and Extension Organization (AREEO), Gorgan, Iran

Abstract

The present study examined the effects of dietary thiamine (vitamin B1) on the physiological performance and egg quality of beluga sturgeon (Huso huso) broodstock. A total of 96 beluga sturgeon broodstocks (mean weight 39.65 ± 6.01 kg) were randomly distributed to 12 tanks and received diets containing 0 (control, C), 5 (TH1), 10 (TH2), and 20 (TH3) mg thiamine kg-1 for 24 months. After the feeding trial, plasma sex steroids, glucose-6-phosphate dehydrogenase (G6PD) enzyme activity, reproductive parameters, and the vitamin content of the egg were assessed. Plasma levels of progesterone, testosterone, and 17β-estradiol were significantly higher in the TH3 group than in the others (p<‌0.05). G6PD enzyme activity was significantly elevated in the TH2 and TH3 groups compared to the control group (p<‌0.05). The control group showed a significant increase in the egg number compared to the TH3 group. The egg diameter significantly increased in the TH3 group (p<‌0.05), while working and relative fecundities remained unaffected (p>0.05). Egg vitamin content significantly augmented in all three thiamine-fed groups compared to the control (p<‌0.05). This study concluded that dietary 20 mg thiamine kg-1 improved physiology, ovarian development, and egg quality of beluga sturgeon broodstock.

Keywords

Iranian Journal of Fisheries Sciences
Volume 25, Issue 5
September 2026
Pages 787-804

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