Relevance of Light Spectra to Growth of the Rearing Tiger Puffer Takifugu rubripes.
In fish, light (photoperiod, intensity and spectra) is main regulator in many physiological actions includinggrowth. We investigate the effect of light spectra on the somatic growth and growth-related gene expression in the rearing tiger puffer. Fish was reared under different light spectra (blue, green and red) for 8 weeks. Fish body weight and total length were promoted when reared under green light condition than red light condition. Expression of somatostatins (ss1 and ss2) in brain were showed higher expression under red light condition than green light condition. The ss3 mRNA was observed only higher expression in blue light condition. Expression of growth hormone (gh) in pituitary was detected no different levels between experimental groups. However, the fish of green light condition group was showed more high weight gain and feed efficiency than other light condition groups. Our present results suggest that somatic growth of tiger puffer is induced under green light condition because of inhibiting ss mRNA expression in brain by effect of green wavelength.
Marine Science Institute, Jeju National University, Jeju 63333, Korea.
Byeong-Hoon
BH
Kim
Jeju International Marine Science Research & Logistics Center, Korea Institute of Ocean Science & Technology.
Sung-Pyo
SP
Hur
Aquaculture Management Division, National Institute of Fisheries Science, Busan 46083, Korea.
Sang-Woo
SW
Hur
Marine Science Institute, Jeju National University, Jeju 63333, Korea.
Chi-Hoon
CH
Lee
Marine Science Institute, Jeju National University, Jeju 63333, Korea.
Young-Don
YD
Lee
growth hormone; light spectra; somatic growth; somatostatin; tiger puffer