Khalil et al., D. (2024). The Impact of Interaction of Photoperiods and Vitamins Supplementation on the Hematological Parameters, Reproductive Hormones, Liver Function, and Reproductive Performance of the Female Nile Tilapia (Oreochromis niloticus). Egyptian Journal of Aquatic Biology and Fisheries, 28(2), 825-842. doi: 10.21608/ejabf.2024.351795
Doha K. Khalil et al.. "The Impact of Interaction of Photoperiods and Vitamins Supplementation on the Hematological Parameters, Reproductive Hormones, Liver Function, and Reproductive Performance of the Female Nile Tilapia (Oreochromis niloticus)". Egyptian Journal of Aquatic Biology and Fisheries, 28, 2, 2024, 825-842. doi: 10.21608/ejabf.2024.351795
Khalil et al., D. (2024). 'The Impact of Interaction of Photoperiods and Vitamins Supplementation on the Hematological Parameters, Reproductive Hormones, Liver Function, and Reproductive Performance of the Female Nile Tilapia (Oreochromis niloticus)', Egyptian Journal of Aquatic Biology and Fisheries, 28(2), pp. 825-842. doi: 10.21608/ejabf.2024.351795
Khalil et al., D. The Impact of Interaction of Photoperiods and Vitamins Supplementation on the Hematological Parameters, Reproductive Hormones, Liver Function, and Reproductive Performance of the Female Nile Tilapia (Oreochromis niloticus). Egyptian Journal of Aquatic Biology and Fisheries, 2024; 28(2): 825-842. doi: 10.21608/ejabf.2024.351795
The Impact of Interaction of Photoperiods and Vitamins Supplementation on the Hematological Parameters, Reproductive Hormones, Liver Function, and Reproductive Performance of the Female Nile Tilapia (Oreochromis niloticus)
Three vitamin supplementations [non-supplemented, vitamin A (V.A), and vitamin D (V.D)] and three different photoperiods (8 light/ 16 dark, 12 light/ 12 dark, and 24 light/ 0 dark) were tested to evaluate their impacts on the hematological parameters, reproductive hormones, liver activity, and reproductive performance of the female Nile tilapia. Approximately, 810 females with an average-weight of 272.56± 37.5g were stocked inside 27 concrete tanks (3m3), with 30 fish/ tank. Fishwere fed with a commercial diet (31.2% protein) at a daily rate of 3% for 60 days. The results revealed that the significant values of hematological parameters were observed under 8L/ 16D, while V.D could increase the mean cell volume, mean cell hemoglobin, and leucocytic count. The interaction effects of photoperiods and vitamins have a significant effect on the hematological parameters. Reproductive hormones were significantly increased under 8L/ 16D, while significant differences were observed by V.D followed by V.A. The interaction between 8L/ 16D and V.D enhanced the reproductive hormones. Transaminases activities were increased significantly under 8L/ 16D. For the interaction effects, the highest transaminases activities were observed under 8L/ 16D without any vitamin addition. The highest gonado and hepato somatic indexes and oocyte diameter were observed under 12L/ 12D, while the highest fecundity was recorded under 24L/ 0D. V.A could improve the gonadosomatic index and oocyte diameter, while the highest fecundity was observed with V.D. The interaction of photoperiods and vitamins A and D supplementation could improve the reproduction performance significantly. In conclusion, the interaction between photoperiod and vitamin A and D supplementation could positively affect the fish performance, hematological parameters, reproductive hormones, liver function, and reproductive performance of the Nile tilapia broodstock.
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