Journal of the Korea Academia-Industrial cooperation Society (한국산학기술학회논문지)

The Korea Academia-Industrial cooperation Society (한국산학기술학회)
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Effect of Dietary Supplementation of Fermented Mealworm on the Growth of Juvenile Stone Flounder (Kareius bicoloratus)

사료내 갈색거저리 유산균 발효물 첨가의 돌가자미 치어 성장 효과

  • Jo, Hyun Sol (Marine Industry Research institute for East sea rim (MIRE)) ;
  • Park, Moo Eog (Gyeongbuk Research Center Freshwater Fish) ;
  • Hong, Sun Mee (Marine Industry Research institute for East sea rim (MIRE))
  • Received : 2021.01.21
  • Accepted : 2021.04.02
  • Published : 2021.04.30
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Abstract

In this study, we aimed to develop a feed additive that can promote the growth of stone flounder (Kareius bicoloratus). To this end, we fermented mealworm medium (5%, w/v) with lactic acid bacteria (LAB) with antibacterial function (HeTm_LpWpPa) and evaluated its efficacy as a feed additive. Fish (approximately 5-6 g) were reared in six completely recirculating tanks (100 fish/tank) for 6 weeks. The total length of fish with and without HeTm_LpWpPa supplementation was 8.26 and 8.42 cm and body weight was 19.71 and 20.28 g, respectively, at 6 weeks. The weight gain of the control and experimental groups was 223.26 % and 248.76 %, respectively. The specific growth rate at 6 weeks was 2.79 % (control) and 2.98% (experimental), and the growth rate of the experimental group was slightly higher (0.19 %) than that of the control group. At the end of the experiment (i.e. 6 weeks), the number of fish below the mean weight in the experimental group was 3 (1 %) and that in the control group was 17 (5.7 %). These results indicate that feed supplementation of 10 % HeTm_LpWpPa could be utilized to promote the growth of flounder in farming.

본 연구는 치어 돌가자미(Kareius bicoloratus) 성장에 도움을 줄 수 있는 사료첨가물 개발을 위해 갈색거저리유충 분말배지(5 %)에 어병 항균 기능을 가지는 유산균을 발효 한 후, 사료첨가물로써의 효능을 실험하였다. 어류 병원체(비브리오균, 연쇄상구균)에 대한 항균기능을 가진 유산균(LAB; L. plantarum, W. paramesenteroides, P. acidilactici)으로 발효한 갈색거저리 추출 발효물의 양어 성장 실증실험을 위해 총 600 마리의 치어 돌가자미(약 5~6 g)를 공시하여 100마리씩 수조 6개에 임의 배치한 후 각 3수조씩 대조군과 실험군으로 분류하여 6주간 평균 전장과 체중을 측정하였다. 6주 후에 대조군의 전장 평균은 8.26 cm, 실험군은 8.42 cm이며, 대조군의 체중 평균은 19.71 g, 실험군은 20.28 g으로 HeTm_LpWpPa 첨가에 있어 성장효과가 증대됨을 확인하였다. 6주간의 증체율은 대조군 223.26 %, 실험군 248.76 %로 HeTm_LpWpPa 첨가군이 25.5 %p 성장효과가 높고, 6주 동안의 일간성장률은 대조군 2.79 %/일, 실험군 2.98 %/일로 실험군이 0.19 %p 더 높았다. 또한 평균 체중 이하의 개체 수에 있어서도 3주째에는 대조군 27마리(9 %), 실험군 9마리(3 %)이고, 6주째에는 대조군 17마리(5.7 %), 실험군 3마리(1 %)로 실험군에서는 평균 체중 이하가 1 %로 균일한 성장 효과가 있었다. 이들 결과는 동애등에 유충 추출 유산균 발효물(HeTm_LpWpPa) 사료 첨가물의 10 % 내외까지 사용은 돌가자미를 포함하는 양어 치어의 성장 촉진에 유효할 것을 시사한다.

Keywords

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