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

The present study examined the effects of dietary thiamine (vitamin B۱) on the physiological performance and egg quality of beluga sturgeon (Huso huso) broodstock. A total of ۹۶ beluga sturgeon broodstocks (mean weight ۳۹.۶۵ ± ۶.۰۱ kg) were randomly distributed to ۱۲ tanks and received diets containing ۰ (control, C), ۵ (TH۱), ۱۰ (TH۲), and ۲۰ (TH۳) mg thiamine kg-۱ for ۲۴ months. After the feeding trial, plasma sex steroids, glucose-۶-phosphate dehydrogenase (G۶PD) enzyme activity, reproductive parameters, and the vitamin content of the egg were assessed. Plasma levels of progesterone, testosterone, and ۱۷β-estradiol were significantly higher in the TH۳ group than in the others (p< ۰.۰۵). G۶PD enzyme activity was significantly elevated in the TH۲ and TH۳ groups compared to the control group (p< ۰.۰۵). The control group showed a significant increase in the egg number compared to the TH۳ group. The egg diameter significantly increased in the TH۳ group (p< ۰.۰۵), while working and relative fecundities remained unaffected (p>۰.۰۵). Egg vitamin content significantly augmented in all three thiamine-fed groups compared to the control (p< ۰.۰۵). This study concluded that dietary ۲۰ mg thiamine kg-۱ improved physiology, ovarian development, and egg quality of beluga sturgeon broodstock.

کلیدواژه ها:

Egg quality ، Great sturgeon ، Physiology ، Reproduction ، Vitamin B۱