Egg hatching rates of brown-marbled grouper, Epinephelus fuscoguttatus under different light wavelengths and intensities

• Main Authors: Mohammad Seth, Siti Nasihin, Nai, Han Tan, Rosli, Muhammad Khairulanwar, Saad, Shahbudin, Mohammad Noor, Normawaty, Mukai, Yukinori
• Format: Article
• Language: English
• Published: Universiti Malaya 2014
• Subjects: SH Aquaculture. Fisheries. Angling
• Online Access: http://irep.iium.edu.my/40903/1/tiger_egg_hatching.pdf; http://irep.iium.edu.my/40903/; http://e-journal.um.edu.my/public/browse-journal-view.php?id=58

This study was conducted to examine the egg hatching rates of brown-marbled grouper, Epinephelus fuscoguttatus under different light conditions in terms of light wavelengths and intensities. Results of two-way ANOVA showed significant difference for light wavelengths (p<0.05), while light intensities showed no significant difference. There was no interaction between light wavelengths and intensities. Post-hoc Tukey test showed that hatching rates under green light wavelength were significantly higher than white and yellow light wavelengths (p<0.05). When white light 2.7 μmoles/m²/s was set as the control, the hatching ratio of the brown-marbled grouper under green light 2.7 μmoles/m²/s was almost three times higher than the control. The lowest ratio of hatching rates was observed under the white light 13.3 μmoles/m²/s with 70 percent lower ratio of hatching rates than the control light. Eggs hatching under other light conditions mostly showed higher ratios than the control light.