Effects of LED light spectra on the growth of the yellowtail clownfish <Emphasis Type="Italic">Amphiprion clarkii</Emphasis> |
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| Authors: | Hyun Suk Shin Jehee Lee Cheol Young Choi |
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| Institution: | (1) Division of Marine Environment and Bioscience, Korea Maritime University, Yeongdo-gu, Busan, 606-791, Republic of Korea;(2) Division of Marine Life Sciences, Jeju National University, Jeju, Jeju Special Self-Governing Province, 690-756, Republic of Korea; |
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| Abstract: | Growth hormone (GH) is an essential polypeptide required for the normal growth and development of vertebrates. We have studied
the effects of light-emitting diodes (LEDs) emitting different spectra (red, green, and blue) on the GH of yellowtail clownfish
Amphiprion clarkii. Full-length GH cDNA from the pituitary of the yellowtail clownfish was first cloned and then the expression of GH mRNA under
different light spectra was measured. GH mRNA expression was significantly higher under green and blue light than under red
light spectra. These results indicate that in yellowtail clownfish, short-wavelength LED enhances growth more than long-wavelength
LED, and that LED lights are more effective for enhancing growth than white fluorescent bulbs. Injection of melatonin resulted
in significantly higher expression levels of GH mRNA compared to the control. We therefore conclude that green and blue light
enhance GH levels and that melatonin plays a role in modulating growth of the yellowtail clownfish. |
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