Journal of Aquaculture (한국양식학회지)

The Korean Society of Fisheries and Aquatic Science (한국양식학회)
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Effect of Water Temperature and Stocking Density on Growth of Juvenile Red Drum Sciaenops ocellatus

사육수온과 밀도가 홍민어 Sciaenops ocellatus의 성장에 미치는 영향

  • Choi, Young-Ung (Department of Aquaculture, Cheju National University) ;
  • Rho, Sum (Department of Aquaculture, Cheju National University) ;
  • Lee, Young-Don (Marine and Environment Research Institute, Cheju National University)
  • 최영웅 (제주대학교 수산생물학과) ;
  • 노섬 (제주대학교 수산생물학과) ;
  • 이영돈 (제주대학교 해양과환경연구소)
  • Published : 2002.08.01
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Abstract

Fed on commercial flounder diet at 20, 23 and $26^{\circ}C$ in semiclosed culture system for 32 weeks, the juvenile red drum (1.2 g) showed linear increase in daily feeding rate (DFR), growth (g/fish) and specific growth rate (SGR) with increasing temperature. In the second experimental series, the young red drum (214 g), cultured at densities of 2.16, 4.24 and 6.40 kg/$m^3$ in flow-through tanks at water temperatures from 12.3 to $27.2^{\circ}C$ for 25 weeks, grew faster at the stocking density of 2.16 kg/$m^3$ than at the densities of 4.24 and 6.40 kg/$m^3$ the difference in growth observed at the stocking densities of 4.24 and 6.40 kg/$m^3$ was not significant. The DFR and SGR were also significantly higher for the density group of 2.16 kg/$m^3$. Briefly, growth of the red drum increased with increasing tested range of temperature and was also faster with decreasing stocking density. However, the total growth (g/tank) increased with increasing stocking density.

수온과 사육밀도에 따른 홍민어의 성장을 조사하기 위하여 20${\pm}$0.5, 23${\pm}$0.5 그리고 26${\pm}$0.5$^{\circ}C$로 각각 조절한 항온 수조에서 평균전장 4.60${\pm}$0.3 cm, 체중 1.17${\pm}$0.6 g되는 치어를 32주간 비교 사육하였으며, 평균 전장 26.6${\pm}$1.7cm, 체중 213.6${\pm}$46.7 g되는 개체를 대상으로 사육밀도 2.16, 4.24 그리고 6.40 kg BW/㎥로 조절하여 25주 동안 사육하였다. 수온에 따른 성장실험에서 전장, 체중, 일간 성장률에서 26$^{\circ}C$, 23$^{\circ}C$, 20$^{\circ}C$ 순으로 수온이 높을수록 빠른 성장을 하였다. 일간섭식율에서도 26$^{\circ}C$에서 가장 높아 수온이 높을수록 높은 값을 나타내었다(P<0.05). 사육밀도에 따른 성장실험에서 전장, 체중, 일간성장률에서 저밀도 실험구에서 높은 값을 나타내었고 일간섭식율에서도 같은 경향이었으며(P<0.05), 실험 시작시 2.16 kg BW/$m^3$, 4.24 kg BW$m^3$ 그리고 6.40 kg BW$m^3$의 사육밀도는 실험 종료시 각각 7.26 kg BW$m^3$, 14.01 kg BW$m^3$, 19.17kg BW$m^3$로 증가하여 6.40 kg$m^3$에서 생산성이 가장 높았다

Keywords

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