폐쇄순환여과시스템에서 참전복, Haliotis discus hannai, 치패의 사육밀도와 성장 = Density Effect on the Growth of Juvenile Abalones (Haliotis discus hannai) Reared in the Closed Recirculating Water System

국문 초록 (Abstract)

전복 치패의 중간육성은 자연에 방류한 증강을 위해 매우 중요한 것으로 알려져 있다. 그러나 제주도의 경우 외해에 면하고 있어서 해양 여건상 해상가두리와 수하식 전복채롱과 같은 중간육성시설의 설치가 매우 어려운 실정이다. 따라서 이 실험에서는 육상수조에서 유수사육을 할 경우 필요한 과다 경비의 절감과 함께 안정적인 전복치패의 중간육성을 위해서 사육이 용이하도록 고안한 폐쇄순환 여과시스템에서 전복치패의 성장에 미치는 밀도의 영향을 알아보고자 평방미터당 1000, 2,000 3,000개체를 수용하여 182일동안 사육하였다. 그 결과, 성장은 평방미터당 1000개체와 2000개체를 수용하였을 경우가 3000개체를 수용했을때 보다 좋았다(P＜0.05). 증육계수는 세가지의 밀도군에서 각각 8.7,9.6,13.1로서 낮은 밀도일수록 낮게 나타났으며, 생존률은 각각 75.3, 70.8, 68.3으로 높은 밀도일수록 낮게 나타났다.

다국어 초록 (Multilingual Abstract)

Secondary seed culture has known to be very important for the purpose of stock conservation and production improvement by increasing the survival of released seed abalones at the natural inhabit.
However, since it is very difficult to find proper places for the facilities of secondary seed culture in Cheju Island where only few sheltered coastal areas can protect floating net cages or nets for hanging culture from strong waves, culture facilities on land can allow us to solve such a problem.
Therefore, the indoor tanks with a closed recirculaing water system have been used for the secondary abalone seed culture in this experiment.
We reared the abalones of Haliotis discus hannai at the three different culture densities including 1,000,2,000, and 3,000 individuals per square meter for 182 days in order to know density effect on the growth of juvenile abalones.
As a result, their growth turned out to be better in the first two density groups of abalones than in the third group, and the difference between their growth was statistically significant at a 95% confidence level.
The value of conversion factor was smallest in the lowest density group, and showed 8.7 in the first, 9.6 in the second, and 13.1 in the third density group, whereas survival rates estimated from the three different density groups were 75.3, 70.8, and 68.3, respectively.