Fish Physiology and Biochemistry

, Volume 28, Issue 1–4, pp 439–440 | Cite as

Effect of high water temperature on brain-pituitary-gonad axis of the red seabream during its spawning season

  • Koichi Okuzawa
  • Naoki Kumakura
  • Koichiro Gen
  • Sonoko Yamaguchi
  • Bong-Soo Lim
  • Hirohiko Kagawa
Article

Abstract

In the present study, we examined the effect of high water temperature on brain-pituitary-gonad (B-P-G) axis of a perciform fish red seabream, Pagrus (Chrysophrys) major during its spawning season (April-May). High water temperature negatively affected all levels in B-P-G axis and turned out to be the termination factor of the spawning season of this species.

FSH GnRH GnRH receptor LH red seabream temperature 

References

  1. Gen, K., Okuzawa, K., Senthilkumaran, B., Tanaka, H., Moriyama, S. and Kagawa, H. 2000. Unique expression of gonadotropin-I and-II subunit genes in male and female red seabream (Pagrus major) during sexual maturation. Biol. Reprod. 63: 308–319.Google Scholar
  2. Okuzawa, K., Gen, K., Bruysters, M., Bogerd, J., Gothilf, Y., Zohar, Y. and Kagawa, H. 2003. Seasonal variation of the three native gonadotropin-releasing hormone messenger ribonucleic acids levels in the brain of female red seabream. Gen. Comp. Endocrinol. 130: 324–332.Google Scholar

Copyright information

© Kluwer Academic Publishers 2003

Authors and Affiliations

  • Koichi Okuzawa
    • 1
  • Naoki Kumakura
    • 2
  • Koichiro Gen
    • 3
  • Sonoko Yamaguchi
    • 4
  • Bong-Soo Lim
    • 2
  • Hirohiko Kagawa
    • 5
  1. 1.National Research Institute of AquacultureFisheries Research AgencyWatarai, MieJapan
  2. 2.Department of Aquatic Biosciences, TokyoUniversity of Fisheries, 4-5-7 Konan, Minato, Tokyo 108-8477Japan
  3. 3.Inland Station, National Research Institute of AquacultureFisheries Research AgencyWatarai, MieJapan
  4. 4.Department of Animal and Marine Bioresources Sciences, Faculty of AgricultureKyushu UniversityFukuokaJapan
  5. 5.Division of Fisheries Science, Faculty of AgricultureMiyazaki UniversityMiyazakiJapan

Personalised recommendations