Indoor Tank Culture of the Abalone Haliotis discus hannai II. Effects of diets on the growth of young abalone

참전복 Haliotis discus hannai의 육상수조사육에 관한 연구 II. 먹이별 사육실험

The study was conducted to develop the suitable abalone's diets for the indoor tank culture. The young abalone Haliotis discus hannai Ino sized ca. 20, 30 and 40 nun in shell length were fed three different diets, dried sea mustard Undaria pinnatifida HARVEY (control), artificial diet and terrestrial plants e. g. Chinese cabbage and Perilla leaf for 2 years. The growth rate of abalones fed an artificial diet was slightly higher than that of abalones from the control. However, the growth rate of abalones from terrestrial plants was significantly lower than that of abalones fed a control or an artificial diet (P< 0.05). The daily feeding rate of young abalones from terrestrial plants was slightly higher than that of abalones from the control. While, that of abalones from an artificial diet was approximately $30\%$ of that of abalones from a control or a terrestrial plants diet. The feed efficiency of abalone from artificail diet was higher than that of abalones from a control or a terrestrial plants diet, and the smaller size of young abalone showed the higher the feed efficiency. The EFA index values ${{\sum}n9/(20:4n6+20:5n3+22:6n3}$ of the dried sea mustard and the artificial diet were 1.26 and 3.64, respectively. These values were favorable, but the value of terrestrial plant, Perilla leaf was 127.00 indicating poor EFA index for normal growth of abalone.

전복을 육상수조에서 사육하기 위한 먹이 개발을 위하여 육상식물 및 배합사료를 공급하여 대조구인 미역과의 성장도, 생존율 및 먹이효과에 대하여 조사한 결과 1. 배합사료, 미역, 육상식물의 순으로 성장이 빨랐으며 생존율은 큰 차이가 없었다 2. 일간섭식률은 미역과 육상식물이 비슷하였고 배합사료는 이 들의 $30\%$ 수준이었다. 사료전환효율은 미역과 육상식물에 비해 배합사료가 월등히 높았으며 치패 크기가 작을수록 높았다. 3. EFA index, ${{\sum}n9/(20:4n6+20:5n3+22:6n3}$는 건미역이 1.26, 배합사요가 3.64로서 양호 값을 나타냈으나, 깻잎의 경우 127.00으로 나타나 참전복에 유효한 지방산이 거의 없는 것으로 나타났다. 4. 전복 육상수조에서의 사육을 위한 여름철 대체 먹이로는 육상식물보다는 배합안료가 효과적이었다.