Effects of the Various Dietary Additives on Growth and Tolerance of Abalone Haliotis discus hannai against Stresses

다양한 사료첨가제 공급에 따른 전복의 성장과 스트레스에 대한 내성 효과

  • Cho, Sung-Hwoan (Division of Marine Environment & Bioscience, College of Ocean Science & Technology, Korea Maritime University) ;
  • Kim, Chung-Il (Division of Marine Environment & Bioscience, College of Ocean Science & Technology, Korea Maritime University) ;
  • Cho, Young-Jin (Division of Marine Environment & Bioscience, College of Ocean Science & Technology, Korea Maritime University) ;
  • Lee, Bom-Sok (Division of Marine Environment & Bioscience, College of Ocean Science & Technology, Korea Maritime University) ;
  • Park, Jung-Eun (Korea Aquaculture Institute) ;
  • Yoo, Jin-Hyung (Jeilfeed Co. Ltd.) ;
  • Lee, Sang-Min (Faculty of Marine Bioscience & Technology, Kangnung National University)
  • 조성환 (한국해양대학교 해양과학기술대학 해양환경생명과학부) ;
  • 김충일 (한국해양대학교 해양과학기술대학 해양환경생명과학부) ;
  • 조영진 (한국해양대학교 해양과학기술대학 해양환경생명과학부) ;
  • 이범석 (한국해양대학교 해양과학기술대학 해양환경생명과학부) ;
  • 박정은 ((주)한국양식개발연구소) ;
  • 유진형 (천하제일사료) ;
  • 이상민 (강릉대학교 해양생명공학부)
  • Published : 2008.11.25

Abstract

Effects of the various dietary additives on growth and tolerance of abalone Haliotis discus hannai to the stresses were determined in the 16-week feeding trial. Seventy juvenile (an initial body weight of 4.2 g) abalone per container were randomly distributed into 21, 50 L plastic rectangular containers each. The six kinds of experimental diets were prepared: control (CON) with no additive, by-product of green tea (BPG), extract of figs (EF), extract of green tea (EG), commercially available product of Hearok (PH), and Haematococcus (HC). In addition, dry sea tangle (ST) was prepared to compare the efficiency of the experimental diets. Fishmeal, soybean meal and shrimp head meal were used as the protein source, and dextrin, sea tangle powder and wheat flour, and soybean oil and fish oil were used as the carbohydrate and lipid sources, respectively in the experimental diets. The experimental diets were fed to abalone once a day at a satiation level with a little leftover. The feeding trial lasted for 16 weeks. At the end of the 16-week feeding trial, abalone was exposed to the different types of stresses (air exposure, and sudden changes of rearing temperature and salinity). Survival of abalone fed the sea tangle was highest. However, weight gain of abalone fed the EF, EG and PH diets was significantly (P<0.05) higher than that of abalone fed the BPG diet or dry sea tangle. Shell length of abalone fed the all experimental diets was significantly (P<0.05) higher than that of abalone fed the dry sea tangle. Accumulated mortality of abalone fed the sea tangle was low when exposed to the different types of stresses. Also, relatively low mortality was achieved in abalone fed the HC and EF diets. In considering these results, it can be concluded that the various sources of additives is effective to improve production of abalone, and Haematococcus and extract of figs can be considered as dietary additives to improve resistance of abalone against the different types of stresses.

사료내 다양한 사료 첨가제 공급에 따른 전복의 성장과 스트레스(공기중 노출, 급격한 온도 변화 및 급격한 염분 변화)에 대한 전복의 내성에 미치는 영향을 조사하였다. 21개의 직사각형 50 L 플라스틱 용기에 각각 70 마리의 치패(시작시 무게 4.2 g)를 수용하여 3개의 1.3톤 raceway에 분산 수용하였다. 다양한 원료의 사료첨가제를 이용하여 6종류의 실험사료 [대조구 (CON), 녹차부산물 첨가(BPC), 무화과엑기스 첨가(EF), 녹차엑기스 첨가(EG), 시판용 해록상품 첨가(PH) 및 Haematococcus 첨가(HC)]를 제조하였으며, 이들 실험사료의 유용성을 평가하기 위하여 건조 다시마(ST)를 공급하는 실험구와 비교하였다. 실험사료는 어분, 대두박 및 새우머리분을 주요 단백질원으로 공급하였으며, 덱스트린, 다시마분말 및 소맥분을 주요 탄수화물원으로 공급하였으며, 대두유와 어유를 주요 지질원으로 공급하여 주었다. 전복은 1일 1회 사료가 조금씩 남아서 만복시까지 먹게끔 충분한 양의 사료를 공급하여 주었다. 각 실험구는 3반복구를 두었으며, 총 사육기간은 16주간이었다. 16주간의 사육실험 종료후, 각 실험 구에서 생존한 전복은 10마리씩 무작위로 추출하여 공기노출, 급격한 온도 변화 및 급격한 염분변화의 스트레스를 주어서 이들의 누적폐사율을 조사하였다. 16주간의 사육실험 종료시 전복의 생존율은 다시마를 공급한 실험구에서 가장 높았다. 그러나 전복의 체중증가는 무화과엑기스, 녹차엑기스 및 해록상품을 첨가한 실험사료를 공급한 실험구에서 녹차부산물 첨가한 시험구 또는 다시마를 공급한 실험구에 비하여 유의적으로 높게 나타났다. 전복의 각장은 다시마를 공급한 실험구에 비하여 실험용 사료를 공급한 모든 실험구에서 유의적으로 높게 나타났다 다양한 형태의 스트레스에 노출시 전복의 누적폐사율은 다시마를 공급한 실험 구에서 낮게 나타났으며, Haematococcus 첨가구 및 무화과엑기스 첨가구에서도 비교적 낮은 전복의 폐사율을 보였다. 이상의 결과를 고려할 때, 본 실험에 이용된 다양한 사료첨가제는 전복의 성장을 개선시키는데 효과적이며, 특히 Haematococcus와 무화과엑기스는 다양한 형태의 스트레스의 내성을 개선시키는 사료 첨가제로서 이용 가능한 것으로 판단된다.

Keywords

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