Effects of selected light wavelengths on the transcript levels of photoreceptors and growth-related hormones and peptides in the Malabar grouper Epinephelus malabaricus
التفاصيل البيبلوغرافية
العنوان:
Effects of selected light wavelengths on the transcript levels of photoreceptors and growth-related hormones and peptides in the Malabar grouper Epinephelus malabaricus
Fish growth is influenced by environmental cues, including light conditions. The duration of exposure (photoperiod), the intensity of exposure (illumination), and quality (light spectrum) play crucial roles in maximizing growth. This study aimed to clarify how selected light wavelengths are perceived and transduced as an internal signal to stimulate growth of the Malabar grouper Epinephelus malabaricus, an important aquaculture species in Asian countries. Four opsins (RH1, RH2, SWS2, and LWS) were selected from the database of photoreceptors of groupers, and reverse-transcription polymerase chain reaction revealed that these opsins were expressed in the eyes and brain. When fish were reared under conditions of long-day (light:dark = 14:10) with red (peak at 632 nm), green (519 nm), and blue (465 nm) LED and natural light, the specific growth rate was higher (P
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