Korean Journal of Environmental Biology (환경생물)

Korean Society of Environmental Biology (한국환경생물학회)
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Bio-floc technology application in olive flounder, Paralichthys olivaceus aquaculture according to the difference of closed recirculating systems

바이오플락 기술을 활용한 순환침전시스템에 따른 넙치(Paralichthys olivaceus)의 양성

  • Cho, Yeong-Rok (West Sea Fisheries Research Institute, National Institute of Fisheries Science) ;
  • Kim, Hyun-Soo (West Sea Fisheries Research Institute, National Institute of Fisheries Science) ;
  • Kim, Su Kyoung (West Sea Fisheries Research Institute, National Institute of Fisheries Science) ;
  • Kim, Su-Kyoung (West Sea Fisheries Research Institute, National Institute of Fisheries Science) ;
  • Kim, Seok-Ryel (West Sea Fisheries Research Institute, National Institute of Fisheries Science) ;
  • Hur, Young Baek (West Sea Fisheries Research Institute, National Institute of Fisheries Science) ;
  • Kim, Jun-Hwan (West Sea Fisheries Research Institute, National Institute of Fisheries Science)
  • 조영록 (국립수산과학원 서해수산연구소) ;
  • 김현수 (국립수산과학원 서해수산연구소) ;
  • 김수경 (국립수산과학원 서해수산연구소) ;
  • 김수경 (국립수산과학원 서해수산연구소) ;
  • 김석렬 (국립수산과학원 서해수산연구소) ;
  • 허영백 (국립수산과학원 서해수산연구소) ;
  • 김준환 (국립수산과학원 서해수산연구소)
  • Received : 2019.02.21
  • Accepted : 2019.04.16
  • Published : 2019.06.30
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Abstract

Juvenile Paralichthys olivaceus (mean weight 685.3±36.7 g) were raised in different and closed recirculating bio-floc system (control, bio-ball, and shelter) for 7 months. The water environment such as water temperature, dissolved oxygen, salinity, pH, and alkalinity according to the difference of closed recirculating system remained stable during the rearing period. No significant changes were observed in dissolved inorganic nitrogen such as ammonia, nitrite, and nitrate were observed in different closed recirculation system. The final weights according to the difference of closed recirculating were 1,524 g (control), 1,674 g (bio-ball), and 1,630 g (shelter). The survival rate was higher than 98%, and the final FCRs (Feed coefficient ratio) were 1.2, 1.1, and 1.2. The results of this study indicated high growth and survival rate in all systems.

이 연구는 초기 넙치종묘(2.69±0.35 g)를 바이오플락으로 6개월간 1차 양성한 넙치를 이용하여, 침전조 매질(대조구, 바이어볼, 파판)별 7개월간 사육양성을 수행하였다. 7개월간 모니터링 결과 수질은 초기 이후, 주요 독성물질인 암모니아 및 아질산 1 mg L-1 이하로 안정적으로 유지되었다. 사료계수(FCR)는 사육 5~6개월에 대조구에서 유의적으로 낮게 나타났지만, 사육 7개월에는 높은 성장을 나타내며 다른 구간과 비슷한 사료계수를 나타내었다. 본 실험에서 모든 시스템에서 안정적인 성장과 수질환경이 유지되었으며, 본 실험 모니터링 결과는 최근 환경오염으로 문제가 되고 있는 유수식 넙치양식에서 친환경 미래양식인 바이오플락으로의 전환을 위한 기초자료로 활용될 수 있을 것이다.

Keywords

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