Journal of Aquaculture (한국양식학회지)

The Korean Society of Fisheries and Aquatic Science (한국양식학회)
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Dietary Value of Frozen and Freeze-Dried Tetraselmis suecica

냉동.동결건조된 Tetraselmis suecica의 먹이효과

  • Published : 1998.05.01
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Abstract

To substitute fromzed and freeze-dried food for live food in the development of the artificial seedling production of bivalve larvae, the dietary value of live T. suecica was compared with those of freeze-dried T. suecica, frozed T. suecica, live T. suecica (50%)+frozen T. suecica (50%), and live T. suecica (50%)+freeze-dried T. suecica (50%) in the rearing of oyster (Crassotrea gigas) and hen clam (Mactra chinensis) larvae, and manila clam (Tapes philipninarum) spats. Oyster larvae fed live T. suecica showed the highest growth (shell hight $231.9^{\mu}$m) and survival rate (72.6%) and those fed freeze-dried T. suecica showed the lowest growth (shell height $168.9^{\mu}$m) and survival rate (35.3%). However, in the hen clam larvae, there were not significantly different among diet group in growth and survival rate. The small spats of manila clam fed live t. suecica or live T. suecica (50%)+freeze-dried T. suecica (50%) showed higher growth and survival rate than those fed other diet group. In the case of large spats of manila clam, live T. suecica and live T. suecica (50%)+frozen T. suecica (50%) showed better growht. But, survival rates were not different among diet groups. Dietary valuse of frozen and dried T. suecica were different on species and growth stage, and frozen and freeze-dried T. suecica can be partially used as substitute food for T. suecica live T. succica in shellfish hatchery.

조개류의 인공종묘생산시 생멱이생물의 대체먹이원을 개발하기 위해 냉동 EH는 건조한 먹이생물의 먹이효율을 조사하였다. T. suecica를 대상으로 실험구를 생 T. suecica, 건조 T. suecica, 냉동 T. suecica, 생 T. suecica(50%)+냉동 T. suecica(50%), 생 T. suecica(50%)건조 T. suecica(50%)를 구분하여 참굴과 개량조개 유생 그리고 바지락 치패에게 먹이로 공급하며 먹이효율을 비교하였다. 참굴 유생의 경우는 생 T. suecica를 공급한 실험구가 각고 $231.9^{\mu}$m로 성장이 가장 좋았고, 생존율은 72.6%로 가장 높게 나타났으며 다른 실험구와 유의적인 차이를 보였으며 건조 T. suecica를 단독으로 공급한 실험구에 각고 $168.7^{\mu}$m, 생존율 39.3%로 가장 저조한 것으로 나타났다. 개량조개 유생에서는 생 T. suecica를 공급한 실험구가 각장 $213.0^{\mu}$m, 생존율 42.9%로 가장 좋았으나 다른 실험구와 유의적인 차이가 없었다. 바지락 소형 치패의 경우 성장은 생 T. suecica, 생 T. suecica(50%)+냉동T. suecica50%)를 공급한 실험구와 다른 실험구와 유의적인 차이를 보였다. 그리고 대형 치패 경우 성장은 생 T. suecica, 생 T. suecica(50%)+건조 T. suecica(50%) 실험구와 유의적인 차이를 나타냈다. 그러나 바지락 치패의 생존율에서는 유의적인 차이를 보이지 않았다. 이와같이 냉동, 건조된 T. suecica의 먹이효율은 유생의 종류와 성장단계에 따라 다른 것으로 나타났으며 생 T. suecica를 부분적으로 대체할 수 있을 것으로 판단된다.

Keywords

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