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Retinal Development and Opsin Gene Expression during the Juvenile Development in Red Spotted Grouper (Epinephelus akaara)

  • Kim, Eun-Su (Marine Science Institute, Jeju National University) ;
  • Lee, Chi-Hoon (Marine Science Institute, Jeju National University) ;
  • Lee, Young-Don (Marine Science Institute, Jeju National University)
  • 투고 : 2019.05.07
  • 심사 : 2019.05.30
  • 발행 : 2019.06.30

초록

To produce healthy and stable seed production, we need to obtain information and understand vision that affects behavior of red spotted grouper. We examined their expression and retinal development during the juvenile development. Short-wavelength sensitive opsin (SWS2), a cone photoreceptor, began to be expressed from lens and ear vesicle formation stage and its expression increased until 10 days after hatching (dah). In case of middle-wavelength sensitive opsin (MWS), its expression was detected at 3 dah and reached the highest level at 21 dah. The expression of long-wavelength sensitive opsin (LWS) was first observed from 3 dah and their expression decreased thereafter. Rhodopsin, a rod photoreceptor, was found to be expressed from 2 dah and its expression reached the highest level at 50 dah. The outer nuclear layer (ONL), inner nuclear layer (INL) and ganglion cell layer began to differentiate at 2 dah, while choroid first appeared at 4 dah so that the eyes became black. These results indicate that the development of retina mostly completes around 4 dah. It seems that the development of the retina and the expression of the opsin genes are closely related to the behavior such as hunting prey, considering that the timing of the completion of the development of the retina, the timing of gene expression, and the timing of completion of yolk absorption are similar.

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참고문헌

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