순환여과 사육시스템에서 참전복의 적정 사육밀도

Optimum stocking density of juvenile abalone, Haliotis discus hannai in recirculating culture system

  • 발행 : 2003.11.01

초록

환경 친화적인 양식 생산성 향상 연구의 일환으로 육상의 폐쇄 사육 시스템에서 전복의 양식 기술개발을 위하여 참전복을 대상으로 최적 사육 밀도를 구명하기 위하여 회전원판식 순환여과 사육시스템에서 사육밀도가 성장과 생존에 미치는 영향을 조사하였다. 평균중량 32 g내외의 크기의 참전복을 각각 5, 10, 15 kg/$m^2$의 사육밀도로 수용하여 사료의 단백질 함량이 30.4% 함유된 전복용 배합사료를 실험기간동안 매일 공급하여 사육한 결과는 다음과 같다. 실험기간동안 사육수온 18.0∼26.5(22.8$\pm$1.6)$^{\circ}C$, 염분 31.1∼34.5(33.2$\pm$0.8), 용존산소 4.8∼7.3(6.5$\pm$0.4)mg/L를 유지하였다. 일간사료공급률, 일간성장률 및 사료효율은 각각 5 kg/$m^2$ 실험구에서 0.76%, 0.19%, 24.2%, l0 kg/$m^2$ 실험구에서 0.75%, 0.13%, 17.4%, 15 kg/$m^2$ 실험구에서 0.38%,0.05%, 14.3%를 보였으며, 사육 밀도가 높은 실험구일수록 일간사료공급률, 일간성장률 및 사료효율이 유의적으로 낮았다(P<0.05). 또한 생존율도 5, 10, 15 kg/$m^2$에서 각각 85.5%, 96.0% 및 31.2%로 고밀도 실험구에서 유의적으로 낮았다(P<0.05). 환경친화적인 육상 순환여과 사육시스템에서 전복이 먹이 섭취를 위한 사육공간의 확보와 전복의 성장률 및 생존율을 고려한 참전복, Haliotis discus hannai의 적정 사육밀도는 5∼10 kg/$m^2$로 추정되었다.

The effects of different stocking densities on the growth of juvenile abalone, Haliotis discus hannai and water quality in the recirculating system with rotating biological contactor, were assessed. The trials were conducted using total weight 32 g juveniles abalone for 60 days at stocking densities of 5, 10, 15 kg/$m^2$. The animals were fed sufficient amounts of the pellet diet of 30.4% protein during the experimental period. Daily feeding rate (DFR) and survival rate (SR) of 5 kg/$m^2$ showed 0.76% and 85.5% those were not significantly differed 10 kg/$m^2$ showing 0.75% and 96.0% (P>0.05). DFR and SR of 15 kg/$m^2$ showing 0.38% and 31.2% were significantly lower than 5 and 10 kg/m2 (P<0.05). Daily growth rate (DGR) and feed efficiency (FE) showed the highest as 0.19% and 24.2% in 5 kg/$m^2$ the lowest as 0.05% and 14.3% in 15 kg/$m^2$ (P<0.05). According to, these results was an inverse relationship between growth and stocking density. The optimum density of juvenile abalone from this experiment is 5 to 10 kg/$m^2$ in the recirculating system.

키워드

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