Journal of Aquaculture (한국양식학회지)

The Korean Society of Fisheries and Aquatic Science (한국양식학회)
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Long-term Evaluation of Muscle Quality of the Olive Flounder, Paralichthys olivaceus, Fed with Extruded Pellet

배합사료로 장기간 사육된 넙치의 육질평가

  • 김강웅 (국립수산과학원 양식사료연구센터) ;
  • 강용진 (국립수산과학원 양식사료연구센터) ;
  • 김경덕 (국립수산과학원 양식사료연구센터) ;
  • 최세민 (국립수산과학원 양식사료연구센터) ;
  • 이종윤 (국립수산과학원 양식사료연구센터) ;
  • 이해영 (국립수산과학원 자원조성연구팀) ;
  • 배승철 (부경대학교 양식학과)
  • Published : 2007.02.25
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Abstract

This study was conducted to evaluate the muscle quality of the olive flounder fed on extruded pellet (EP) diets compared with a raw fish moist pellet (MP) diet for olive flounder, Paralichthys olivaceus in a commercial scale for a year. The sensory and physical qualities and palatable compounds were compared for evaluation of muscle quality in fish. Four diets were formulated for this experiment: two experimental EP diets (EP 1 and 2), one commercial EP diet (CEP) and MP diet. Crude lipid of fish fed EP1 and EP2 was significantly higher (P<0.05) than that of fish fed CEP, but not significantly different from that of fish fed MP (P>0.05). In the palatable compounds, the free amino acids composition were much alike in that of all the diets. Proline, glycine and alanine from fish fed diet EPs were the most abundant compound among amino acid compositions. There was little difference in the free amino acid compositions of all flounder from localities and the growing conditions between wild and cultured fishes. Taurine of fish fed EP1 was dominantly high over that of fish fed EP2, CEP and MP. In all nucleotides and their related compounds, ATP and IMP from fish fed EP diets were higher (P<0.05) than those of fish fed MP. In the sensory score, overall-acceptability of fish fed EP2 were significantly higher (P<0.05) than that of fish fed EP1, CEP and MP. Hardness of physical properties from fish fed EP2 was significantly higher (P<0.05) than those of fish fed CEP (P<0.01). These results strongly suggest that diets EP could be developed to replace MP diet for the grow-out stage of olive flounder without adverse effect on growth performance.

이 연구는 실용 배합사료를 자체 제작한 기존의 배합사료, 상품사료 및 습사료를 장기간 걸쳐 사육한 넙치에 대해 육질을 평가하기 위해 수행하였다. 실험어는 13개월간 사육한 넙치 성어기(600 g 전후) 대상으로 수행하였으며, 실험사료는 시험사료(EP1 및 EP2) 2종, 상품사료(CEP) 및 습사료(MP)를 공급하였다. 전어체의 성분분석은 조단백질은 EP2가 EP1 및 CEP 사료구 보다 유의적으로 높게 나타났으며, 조지방은 EP2 및 MP 사료구가 CEP 사료구와 비교하여 유의적으로 높게 나타났다. 근육내 유리아미노산의 성분분석은 EP사료구간에서 MP 사료구보다 proline, glycine, alanine 함량이 높게 나타났으며, taurine에 있어서 EP1 사료구가 다른 사료구와 비교하여 높은 경향을 보였다. 핵산 관련물질 성분분석은 ATP 및 IMP의 양에서 배합사료에서 습사료보다 높은 값을 보였으며, 특히 EP2에서 다른 사료구와 비교하여 높은 값을 보였다. 관능검사는 향, 외관, 맛에 있어서 EP 사료구와 MP 사료구가 유의적인 차이를 보이지 않았다(P>0.05). 전반적인 기호도에 있어 EP2가 다른 사료구들보다 유의적으로 높게 나타났다. 물리적 성질의 경도 측정은 EP2는 EP1 및 CEP 사료구와 비교하여 높게 나타났으며, 탄력성과 응집성은 모든 사료구에서 차이를 보이지 않았다. 상기 결과를 토대로 그동안 배합사료를 넙치에 공급한 연구 결과를 고려하였을 때, 생사료를 공급한 넙치에 비해 품질이 결코 떨어지지 않으며, 오히려 배합사료를 공급한 양식산 넙치가 체계적인 관리 하에 앞으로 품질향상을 더 높일 수 있을 것이다.

Keywords

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