Badran, A., El-Danasoury, M., Sharaf, S., Hassan, A. (2019). Effect of Artificial Photoperiod Program on the Maturation Stages of Gilthead Sea Bream (Sparus Aurata). Suez Canal Veterinary Medical Journal. SCVMJ, 24(1), 113-122. doi: 10.21608/scvmj.2019.59210
Ahmed Badran; Mohamed El-Danasoury; Safaa Sharaf; Ahmed Hassan. "Effect of Artificial Photoperiod Program on the Maturation Stages of Gilthead Sea Bream (Sparus Aurata)". Suez Canal Veterinary Medical Journal. SCVMJ, 24, 1, 2019, 113-122. doi: 10.21608/scvmj.2019.59210
Badran, A., El-Danasoury, M., Sharaf, S., Hassan, A. (2019). 'Effect of Artificial Photoperiod Program on the Maturation Stages of Gilthead Sea Bream (Sparus Aurata)', Suez Canal Veterinary Medical Journal. SCVMJ, 24(1), pp. 113-122. doi: 10.21608/scvmj.2019.59210
Badran, A., El-Danasoury, M., Sharaf, S., Hassan, A. Effect of Artificial Photoperiod Program on the Maturation Stages of Gilthead Sea Bream (Sparus Aurata). Suez Canal Veterinary Medical Journal. SCVMJ, 2019; 24(1): 113-122. doi: 10.21608/scvmj.2019.59210
Effect of Artificial Photoperiod Program on the Maturation Stages of Gilthead Sea Bream (Sparus Aurata)
1Aquatic hatchery production department, Fish farming and technology institute, Suez Canal University
2Department of animal production and fish resources, Faculty of Agriculture, Suez Canal University
3Department of Animal Hygiene, Zoonoses and Behaviour, Faculty of Veterinary Medicine, Suez Canal University.
Abstract
Photoperiod is one of the most important factors driving sexual maturation in fish. This study showed the effect of artificial photoperiod program on the maturation stages of Gilthead Sea bream in captivity. A total number of 78 Gilthead Sea bream (Sparus aurata) broodstock (48 male and 30 female) of 295.56 g and 332.03 g average body weight, respectively, fishes were collected and kept in indoor fiber circular tanks filled with salt water and under controlled photoperiods. They were divided into 2 groups. The first group was exposed to water temperature 22 ± 1 ̊ C, natural photoperiod and natural light intensity (control). Fish of the second group was kept at water temperature 22 ± 1° C and exposed to artificial photoperiod program with 600 lux light intensity. The experiment was conducted for 4 months. At the end of every month Gonadosomatic Index (GSI %) and histological sections were done. Results showed that GSI value was highest in second group after the third month in female and in second month in male when compared to fish in the control group. The histological sections confirmed these results. It could be concluded that photoperiod program is an initiative for reproductive cycle and gonadal maturation but it couldn’t reach the final maturity and can induce spawning of gilthead sea bream in captivity.
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