Journal of Aquaculture (한국양식학회지)

The Korean Society of Fisheries and Aquatic Science (한국양식학회)
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Effect of Extruded and Moist Pellets at Different Feeding Rate on Growth and Body Composition of Juvenile Flounder, Paralichthys olivaceus

부상 건조사료(EP) 습사료(MP)의 만복 및 제한 공급이 넙치 치어의 성장 및 체조성에 미치는 영향

  • Seo Joo-Young (Faculty of Marine Bioscience and Technology, Kangnung Natinonal University) ;
  • Lee Jong Ha (National Fisheries Research and Development Institute) ;
  • Kim Gun-Up (Gangwon Province Marine Culture Experimental Station) ;
  • Lee Sang-Min (Faculty of Marine Bioscience and Technology, Kangnung Natinonal University)
  • 서주영 (강릉대학교 해양생명공학부) ;
  • 이종하 (국립수산과학원 동해수산연구소 어류연구센터) ;
  • 김근업 (강원도 수산 양식시험장) ;
  • 이상민 (강릉대학교 해양생명공학부)
  • Published : 2005.02.01
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Abstract

A 10-week feeding trial was conducted to determine the optimum feeding rate of two extruded pellets (EP1 and EP2) and raw fish-based moist pellet (MP) for juvenile flounder. Two replicate groups of the fish (average weight of 27 g) were fed EP and MP three times daily at different feeding rate (satiation and $85\%$ satiation). Weight gain of fish was not affected by diet, but affected by feeding rate. Weight gain with satiation feeding group showed :t tendency to higher compared to that of fish with $85\%$ satiation feeding at the same diet. Feed efficiency of fish was affected by diet, but not feeding rate. Feed efficiency of fish fed the EP1 and EP2 was higher than that of fish fed the MP at the same feeding rate. Daily feed intake was affected by diet and feeding rate. Daily feed intake of fish fed with satiation was higher than that of fish with $85\%$ satiation at same diet, and this variable of fish fed the MP was higher than that of fish fed the EP 1 and EP2. Protein efficiency ratio of fish fed the MP was significantly lower than that of fish fed the EP1 and EP2 regardless of feeding rate. Lipid content of whole body was affected by diet, and that of fish fed the EP2 and MP at satiation feeding was the highest. It can be concluded that satiation feeding will be good and EP is better than MP for growth of juvenile flounder grown from 27 g to 51 g.

본 연구는 부상 건조사료와 습사료의 효능을 비교함과 동시에 이들 사료의 적정 공급률(만복 및 제한 공급)을 조사하기 위해 수행되었다 평균 체중 27 g의 넙치를 각 수조마다 500 마리씩 2반복으로 수용하여 부상 건조사료(EP1과 EP2)와 넙치용 분말사료(우성 사료)와 냉동 전갱이를 1:3의 무게 비율(습중량 기준)로 혼합하여 성형한 moist pellet (MP)을 만복 및 만복의 $85\%$로 공급하면서 10주간 사육하였다. 생존율은 모든 실험구에서 $94\%$ 이상이었으며, 증중량은 EP2를 만복 공급한 실험구가 가장 높았지만, EP1을 만복 공급한 실험구와 MP를 만복 및 제한 공급한 실험구들과는 유의한 차이가 없었다(P>0.05). 사료효율은 EPI과 EP2를 제한으로 공급한 실험구가 가장 높은 결과를 보였으며(P<0.05),동일한 사료 공급률에 있어 MP를 공급한 실험구가 EP1과 EP2를 공급한 실험구에 비해 유의적으로 낮은 결과를 보였다(P<0.05). 일일사료섭취율은 만복 및 제한 공급구 각각에서 MP를 공급한 실험구가 EP1 및 EP2을 공급한 실험구보다 유의하게 높았다(P<0.05). 단백질효율은 만복 및 제한 공급에 관계없이 MP를 공급한 실험구가 EPI 및 EP2를 공급한 실험구보다 유의하게 낮았다(P<0.05). 에너지 축적효율은 사료종류 및 공급률에 영향을 받지 않았다(P>0.05). 전어체의 수분, 단백질 및 회분의 함량은 모든 실험구에서 유의적인 차이를 보이지 않았다. 반면에 지질의 함량은 EP2와 MP의 만복 공급구에서 가장 높았고, EP1의 만복 공급구에서 가장 낮은 값을 보였다. 본 실험의 결과로부터, 본 연구에 사용된 EP 사료들은 현재 양식현장에서 사용하고 있는 생사료를 대체할 수 있을 것으로 생각되며, 사료는 만복으로 공급되는 것이 좋을 것으로 판단된다.

Keywords

References

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