Journal of Aquaculture (한국양식학회지)

The Korean Society of Fisheries and Aquatic Science (한국양식학회)
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Induction of Maturation and Ovulation with HCG Treatment in the Sevenband Grouper Epinephelus septemfasciatus

HCG 처리에 의한 능성어 Epinephelus septemfasciatus의 성숙과 배란유도

  • Song, Young-Bo (Marine and Environmental Research Institute, Cheju National University) ;
  • Baek, Hae-Ja (Department of Marine Biology, Pukyong National University) ;
  • Kim, Hyung-Bae (Department of Marine Bio-resource, Gangwon Provincial University) ;
  • Soyano, Kiyoshi (Marine Research Institute, Nagasaki University) ;
  • Kim, Se-Jae (Department of Life Science, Cheju National University) ;
  • Lee, Young-Don (Marine and Environmental Research Institute, Cheju National University)
  • 송영보 (제주대학교 해양과환경연구소) ;
  • 백혜자 (부경대학교 자원생물학과) ;
  • 김형배 (강원도립대학 해양생물자원개발과) ;
  • ;
  • 김세재 (제주대학교 생물학과) ;
  • 이영돈 (제주대학교 해양과환경연구소)
  • Published : 2008.05.25
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Abstract

To induce of maturation and ovulation, ovary with different development stage of oocytes of sevenband grouper Epinephelus septemfasciatus(n=51, TL $69.1{\pm}1.0$ cm, BW $5.8{\pm}0.3$ kg) rearing indoor-tank in mature and spawning season(June to July) were investigated by cannulation. Female with yolk globule stage oocyte($300{\sim}500{\mu}m$) was injected with human chorionic gonadotropin(HCG, 500 IU/kg BW). Oocytes developed at diameter $300{\sim}700{\mu}m$ in 24 hrs after the HCG injection, and the distribution ratio of over $800{\mu}m$ of oocytes diameter in the cannulated eggs were $91.3{\sim}98.8%(95.1{\pm}3.7%)$ in 48 hrs after the HCG injection. Ovulation was induced from 7 out of 8 female after the HCG injection. The total volume of stripped eggs was 2,480 mL, and the volume of buoyant eggs was 1,360 mL. The fertilization and hatching rates of buoyant eggs were $56.2{\sim}94.9%$ and $70.7{\sim}97.9%$, respectively. These results suggested that HCG 500 IU/kg BW effects on maturation and ovulation of female sevenband grouper with yolk globule stage of oocyte.

능성어 암컷의 난모세포 발달에 따른 성숙 및 배란유도를 위하여 제주도 연안에서 채집하여 사육중인 능성어 51마리(전장 $69.1{\pm}1.0cm$, 체중 $5.8{\pm}0.3kg$)를 대상으로 암컷의 생식소 발달을 cannulation으로 조사하였다. 난황구기 단계 이상 난모세포(난경 $300{\sim}500{\mu}m$)를 가진 어미를 대상으로 HCG 500 IU/kg BW로 주사하였다. HCG 처리 후 난경변화는 24시간째에 $300{\sim}700{\mu}m$, 48시간째에는 $800{\mu}m$ 이상이 $91.3{\sim}98.8%(95.1{\pm}3.7%)$이었다. HCG 처리 실험구에서는 실험어 8마리 중 7마리가 배란되었고, 총 배란된 알 2,480 mL이었으며, 이중 부상란은 1,360 mL이었다. 수정률과 부화율은 각각 $56.2{\sim}94.9%(77.8{\pm}2.9%),\;70.0{\sim}97.7%(92.2{\pm}2.1%)$이었다. 이들 결과들은 HCG 500 IU/kg BW 농도로 처리했을 때 난황구기 난모세포를 가진 능성어 암컷의 성숙 및 배란에 효과가 있을 것으로 사료된다.

Keywords

References

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