Journal of Aquaculture (한국양식학회지)

The Korean Society of Fisheries and Aquatic Science (한국양식학회)
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Preliminary Studies on Establishment of Criteria to Evaluate the Quality of Fish Oil Used in Aquatic Feed

양어사료용 어유의 품질평가 기준설정을 위한 기초연구

  • 최세민 (부경대학교 양식학과/사료영양연구소) ;
  • 김재원 (부경대학교 양식학과/사료영양연구) ;
  • 한경민 (부경대학교 양식학과/사료영양연구) ;
  • 이승형 (부경대학교 양식학과/사료영양연구) ;
  • 배승철 (부경대학교 양식학과/사료영양연구소)
  • Published : 2004.05.01
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Abstract

In the fish oil forced oxidized at 6$0^{\circ}C$ for 10 days, changes in the levels of peroxide (POV), anisidine (AnV), total oxidation (Totox), iodine (IV), acid (AV) and fatty acids composition were measured. The levels of POV, AnV and Totox remained unchanged or decreased after reaching the maximum. The concentrations of polyunsaturated fatty acids (PUFA) such as Docosa hexaenoic acid (DHA) or Eicosa pentaenoic acid (EPA) decreased with extended oxidation of fish oil. In saturated fatty acids (SFA) like C16:0, their concentration increased with decreasing PUFA. The ratios of PUFA/SFA and DHA/C16:0 decreased with extended oxidation of fish oil. Using a single parameter of POV, AnV, Totox, AV, IV, or fatty acids for evaluation of the quality of fish oil may prove difficult. Besides other parameters, the ratios of PUFA/SFA and/or DHA/C16:0 could be a good index to evaluate the quality of fish oil.

본 연구는 국내 양어사료에서 이용되고 있는 어유의 품질을 평가하는데 있어 어떠한 분석 항목이 중요한지 확인하여 양어용 사료의 질적 개선을 위한 기초자료를 마련하는데 그 목적이 있다. 실제 양어사료에 이용되고 있는 E사 어유를 6$0^{\circ}C$ 건조기에서 10일 동안 인위적으로 산화시켜 POV, AnV, Totox, AV, IV, 불포화지방산의 변화를 관찰하였다. 실험결과 POV, AnV, Totox의 수치는 지질의 산화가 최대 값을 나타낸 뒤 불일정하게 나타났다. 반면에, DHA와 EPA를 비롯한 PUFA는 지속적으로 감소하고, 이에 따라 SFA와 monoene은 지속적으로 증가하는 경향이 나타났다. 그리고 PUFA/SFA와 DHA/C16:0은 산화가 진행됨에 따라 지속적으로 감소하는 경향이 나타났다. 따라서, 실험결과를 통하여 POV, AnV, totox, AV, IV, 불포화지방산 등 각각의 분석항목을 단독으로 이용하여 어유 전차의 품질을 판단하기 어렵다고 판단되며, POV, AnV totok, AV, IV 불포화지방산 외에 PUFA/SFA와 DHA/C16:0의 비율도 어유의 품질평가를 하기 위한 새로운 지표가 될 것으로 사료된다.

Keywords

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