Korean Journal of Environmental Biology (환경생물)

Korean Society of Environmental Biology (한국환경생물학회)
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Growth Performance and Blood Chemistry of Starry Flounder Platichthys stellatus Fed Extruded and Moist Pellet

공급 사료에 따른 강도다리 (Platichthys stellatus)의 성장과 혈액성분의 변화

  • Park, Seongdeok (Department of Marine Bio-Science, Gangwon State University) ;
  • Kim, Jae Won (Department of Marine Bio-Science, Gangwon State University) ;
  • Kim, Pyong Kih (Department of Marine Bio-Science, Gangwon State University) ;
  • Jeon, Joong-Kyun (Department of Marine Biotechnology, Gangneung-Wonju National University)
  • 박성덕 (강원도립대학교 해양생명과학과) ;
  • 김재원 (강원도립대학교 해양생명과학과) ;
  • 김병기 (강원도립대학교 해양생명과학과) ;
  • 전중균 (강릉원주대학교 해양생물공학과)
  • Received : 2015.11.24
  • Accepted : 2016.02.23
  • Published : 2016.09.30
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Abstract

This study was evaluated individual growth and hematological changes of young starry flounder, using hyperpigmentation marks on the blind side of body after feeding extruded pellet (EP) and moisture pellet (MP) for 45 days. As a result, the fish grew up to $220.1{\pm}47.8g$ in the EP treatment and $224.7{\pm}42.4g$ in the MP treatment, so the weight gain was significantly higher in the MP treatment ($74.6{\pm}17.3%$) than in the EP treatment ($63.7{\pm}16.9%$) (P<0.05). Osmolalities of flounder after 45 days culture were similar between the treatments (P>0.05), showing values of $359.8{\pm}4.2mOsm\;kg^{-1}$ in the EP treatment and $358.5{\pm}6.2mOsm\;kg^{-1}$ in the MP treatment. Similarly, other blood chemistry indicators such as sodium, chloride, total protein, albumin, glucose, total cholesterol, BUN, creatinine, ammonia, triglyceride, cortisol, GOT, GPT and hematocrit showed no differences between the treatments. However, the free fatty acid concentration was significantly higher in the MP treatment than in the EP treatment (P<0.05).

본 연구는 EP사료와 MP사료를 공급한 강도다리의 성장과 혈액성분의 변화 조사를 통해 강도다리 양식에 대한 기초 자료를 제공하고자 수행되었다. 실험 개시 전과 종료 후에 강도다리의 무안측 생체무늬를 사진 촬영하여 개체 인식 가능성을 확인한 바, 생체 무늬의 큰 변화가 관찰되지 않아 향후 강도다리를 비롯한 넙치류에서의 개체 인식 수단으로 활용 가능할 것으로 여겨진다. 증중량과 일간 성장률은 MP 사료 시험구가 EP사료 시험구보다 높았으며, 혈액성분 중 삼투압과 관련된 전해질 농도, 코티졸 농도, 간장 건강도 지표, 영양 지표 등은 시험구 간 차이가 나타나지 않았다. 그러나 공급 사료의 지질 함량이 상대적으로 많았던 MP사료 시험구의 혈중 유리지방산 농도가 높게 나타나, 증중량이나 일간 성장률이 높았던 것과도 관련이 있을 것으로 여겨지며, 수온이 낮은 수역에 주로 서식하는 강도다리가 지질을 에너지원으로 효과적으로 활용한다는 것을 확인할 수 있었다. 두 사료 시험구에서 모두 일간 성장률이 큰 그룹이 낮은 그룹에 비해 혈중 유리지방산 농도가 높았던 것에 대한 상관성에 대해서는 향후 더욱 상세한 검토가 필요할 것으로 생각한다.

Keywords

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