Comparative of quality of wild-captured and farmed Sebastes schlegeli
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摘要: 为了解不同生长环境下鱼类的品质差异,分别对野生和养殖许氏平鲉主要营养成分、质构及FTIR特性进行了比较分析。结果表明,野生许氏平鲉的水分含量显著高于养殖许氏平鲉(p<0.01),粗蛋白、粗脂肪含量显著低于养殖许氏平鲉(p<0.05);野生许氏平鲉氨基酸总量、必需氨基酸总量和呈味氨基酸总量都显著高于养殖许氏平鲉(p<0.05),必需氨基酸指数也高于养殖许氏平鲉;野生许氏平鲉的单不饱和脂肪酸总量以及ARA、EPA都显著高于养殖许氏平鲉(p<0.05),而DHA显著低于养殖许氏平鲉(p<0.05);在质构特性上,野生许氏平鲉的黏附性显著低于养殖许氏平鲉(p<0.05),而弹性、咀嚼性显著高于养殖许氏平鲉(p<0.05),FTIR分析结果表明,野生和养殖许氏平鲉脂肪酸特征峰峰形差异明显,这是两者脂肪酸差异显著的一个验证。研究结果表明,许氏平鲉在不同的生长环境下其基本营养成分、氨基酸、脂肪酸和质构等特性差异显著,可以作为其品质评价与分级研究的基础资料和参考依据。Abstract: In order to find out the quality differences of Sebastes schlegeli in different living conditions, the primary nutrients, textural and FTIR properties of wild-captured and farmed Sebastes schlegeli were compared and analyzed. The results showed that the moisture content of wild-captured Sebastes schlegeli was significantly higher than farmed ( p < 0.01) , while the contents of crude protein and crude fat of wild-captured Sebastes schlegeli were significantly lower than farmed ( p < 0.05) .The contents of total amino acids and essential amino acids and delicious amino acids of wild-captured Sebastes schlegeli were significantly higher than farmed ( p < 0.05) . The essential amino acids index ( EAAI) of wild-captured Sebastes schlegeli was higher than farmed.The contents of MUFA, ARA and EPA of wild-captured Sebastes schlegeli were significantly higher than farmed ( p < 0.05) , while the contents of DHA were significantly lower than farmed ( p < 0.05) . The adhesiveness of wild-captured Sebastes schlegeli was significantly lower than farmed ( p < 0.05) , while the springiness and chewiness of wild-captured were significantly higher than farmed ( p < 0.05) . There were obvious differences in the characteristic peaks of fatty acids in the FTIR. It was a validation on significant differences of fatty acids composition between wild-captured and farmed Sebastes schlegeli.The results indicated that, there were significant differences on the basic nutrients, amino acids, fatty acids and textural properties of Sebastes schlegeli in different living conditions.These could be used as basic information and reference in order to study on quality evaluation and grading.
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Keywords:
- Sebastes schlegeli /
- nutrient composition /
- textural properties /
- infrared spectra
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