The existence of extra-retinal and extra-pineal photoreceptive organ regulating gonadal development of ayu, Plecoglossus altivelis

@article{Masuda2003TheEO,
  title={The existence of extra-retinal and extra-pineal photoreceptive organ regulating gonadal development of ayu, Plecoglossus altivelis},
  author={Taizo Masuda and Masayuki Iigo and Kanta Mizusawa and Khazaali Aida},
  journal={Fish Physiology and Biochemistry},
  year={2003},
  volume={28},
  pages={433-434}
}
The photoreceptors regulating photoperiodic gonadal development of ayu, Plecoglossus altivelis, are not known. In this study, we examined whether the gonads of ophthalmectomized and pinealectomized (Ex+Px) ayu respond to short photoperiod. Gonadosomatic index (GSI) and plasma levels of sex steroids were significantly increased in Ex+Px ayu kept under short photoperiod in both males and females. On the other hand, there were no significant increase in GSI and sex steroids in Ex+Px ayu kept under… CONTINUE READING

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The significance of photoperiod on the gonadal development of ayu Plecoglossus altivelis

K. Suzuki
  • Doctoral dissertation, University of Tokyo, Tokyo.
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