Korean Journal of Fisheries and Aquatic Sciences (한국수산과학회지)

The Korean Society of Fisheries and Aquatic Science (한국수산과학회)
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Sperm Collection Time, Sex Steroid Hormones, and Gonadal Development of Black Porgy, Acanthopagrus schlegeli, Acclimated in Freshwater

담수순화 감성돔 Acanthopagrus schlegeli의 생식소발달, 성 스테로이드호르몬 및 채정시기

  • Jeong, Min-Hwan (Aquaculture Management Division, National Fisheries Research and Development Institute) ;
  • Lim, Han-Kyu (West Sea Fisheries Institute, National Fisheries Research and Development Institute) ;
  • Kim, Young-Soo (Department of Marine Bio-materials and Aquaculture, Pukyong National University) ;
  • Kim, Su-Yeon (Department of Marine Bio-materials and Aquaculture, Pukyong National University) ;
  • Chang, Young-Jin (Department of Marine Bio-materials and Aquaculture, Pukyong National University)
  • 정민환 (국립수산과학원 양식관리과) ;
  • 임한규 (국립수산과학원 서해수산연구소) ;
  • 김영수 (부경대학교 해양바이오신소재학과) ;
  • 김수연 (부경대학교 해양바이오신소재학과) ;
  • 장영진 (부경대학교 해양바이오신소재학과)
  • Received : 2010.07.08
  • Accepted : 2010.10.11
  • Published : 2010.10.31
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Abstract

The sperm collection time, sex steroid hormones, and gonadal development of protandrous black porgy, Acanthopagrus schlegeli, acclimated in freshwater for more than 2 years were investigated to evaluate its reproductive capability. The gonadal development of black porgy reared in seawater and freshwater could each be classified into four successive stages. For black porgy reared in seawater (BSW) as the control, these were the growing (December to February), mature (February to March), spent (March to June), and degeneration and resting (July to December) stages; for black porgy reared in freshwater (BFW), these were the growing (November to January), mature (January to February), spent (February to May), degeneration and resting (June to November) stages. In both BSW and BFW, the plasma cortisol levels were the highest in March. The plasma testosterone (T) levels of BSW and BFW were the highest in March and February, respectively. The plasma estradiol-$17{\beta}$ ($E_2$) levels did not differ significantly between BSW and BFW. The 11-ketotestosterone (11-KT) levels in the plasma of BSW and BFW were the highest in April. Sperm was collectible from March to June in BSW and from February to May in BFW. The results indicated that the gonadal maturation of BFW was about 1 month faster than that of BSW.

Keywords

References

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