Ocean and Polar Research

Korea Institute of Ocean Science & Technology (한국해양과학기술원)
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Effects of Salinity, Water Temperature and Development Stage on the Hatching Rate and Survival of Fertilized Eggs in Hybrid Grouper (Epinephelus fuscoguttatus ♀ × E. lanceolatus ♂) for Long-distance Transport

대왕범바리(Epinephelus fuscoguttatus ♀ × E. lanceolatus ♂) 수정란의 장거리 수송을 위한 염분, 수온 및 발생단계에 따른 생존율 및 부화율

  • Kim, Kang-Rae (Department of Life Science & Biotechnology, College of Natural Sciences, Soonchunhyang University) ;
  • Moon, Shin-Joo (Department of Life Science & Biotechnology, College of Natural Sciences, Soonchunhyang University) ;
  • Park, Jong-Yeon (Department of Life Science & Biotechnology, College of Natural Sciences, Soonchunhyang University) ;
  • Huynh, Duc Tam (Department of Life Science & Biotechnology, College of Natural Sciences, Soonchunhyang University) ;
  • Park, Jung-Yeol (Department of Marine & Fisheries Resources, College of Natural Sciences, Mokpo National University) ;
  • Kim, Keun-Sik (Ulleungdo-Dokdo Ocean Research Station, KIOST) ;
  • Han, Sang-Bong (Aqua Biotech Corp., Soonchunhyang University) ;
  • Bang, In-Chul (Department of Life Science & Biotechnology, College of Natural Sciences, Soonchunhyang University)
  • 김강래 (순천향대학교 자연과학대학 생명시스템학과) ;
  • 문신주 (순천향대학교 자연과학대학 생명시스템학과) ;
  • 박종연 (순천향대학교 자연과학대학 생명시스템학과) ;
  • ;
  • 박중열 (목포대학교 자연과학대학 해양수산자원학과) ;
  • 김근식 (한국해양과학기술원 울릉도.독도해양과학기지) ;
  • 한상봉 ((주)아쿠아바이오텍) ;
  • 방인철 (순천향대학교 자연과학대학 생명시스템학과)
  • Received : 2018.06.11
  • Accepted : 2018.09.12
  • Published : 2018.09.30
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Abstract

We examined the effect of salinity and water temperature on hatching and survival rates of fertilized eggs of hybrid grouper (Epinephelus fuscoguttatus ♀ ${\times}$ E. lanceolatus ♂) at different developmental stages, determining optimal conditions for their long-distance transportation. Deformities and hatching rates of fertilized grouper eggs were observed at salinities of 24, 27, 30, 33, 36, and 39 psu. The optimal salinity was determined to be 36 psu, with a survival rate of $70.0{\pm}2.0%$. Transportation experiments at 36 psu were conducted at water temperatures of 21, 24, 27, and $30^{\circ}C$, different developmental stages such as morula, 5-myomere, and tail beating for hatching and survival rates. The optimal water temperature and developmental stage for transporatation were $30^{\circ}C$ and tail beating stage and those hatching rates were $50.6{\pm}1.9%$ and $86.3{\pm}1.3%$, respectively. At $21^{\circ}C$, the survival rate by transportation water temperature was highest ($73.1{\pm}10.6%$), but the hatching rate ($17.1{\pm}3.1%$) was lowest. Therefore, the hybrid grouper fertilized eggs (E. fuscoguttatus ♀ ${\times}$ E. lanceolatus ♂) can be most efficiently produced under long-distance transportation conditions during the tail beating stage and at a water temperature of $30^{\circ}C$.

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References

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