The effect of different seasons on sterol content of seafoods was investigated. There were four sterols (cholesterol, sitosterol, desmosterol and stigmasterol) identified, with cholesterol being the predominant sterol. Stigmasterol was a minor component in fish muscle, whilst sitosterol was one of the main phytosterols found in fish muscle. Cholesterol content of fish consisted of 38-100% of total sterols in fish and 54-80% of total sterols in shellfish. The highest cholesterol content of fish muscle was found in summer and the lowest in autumn, whereas season did not have any effect on cholesterol level of green tiger prawn and speckled shrimp. Total sterol content of fish muscle ranged from 49 to 110 mg/100 g, although the range of total sterols in shrimp muscle was between 62 and 91 mg/100 g. The result of the study showed that total sterols in fish were generally found at lower levels in winter compared with other seasons.

译文

研究了不同季节对海鲜中固醇含量的影响。鉴定出四种固醇 (胆固醇,谷甾醇,去甾醇和豆甾醇),其中胆固醇是主要的固醇。豆甾醇是鱼类肌肉中的次要成分,而谷甾醇是鱼类肌肉中发现的主要植物甾醇之一。鱼的胆固醇含量由鱼中38-100% 的总甾醇和贝类中54-80% 的总甾醇组成。夏季发现鱼肌肉中胆固醇含量最高,秋季最低,而季节对绿虎虾和斑点虾的胆固醇水平没有任何影响。鱼肌肉的总固醇含量范围为49至110 mg/100g,尽管虾肌肉中的总固醇含量范围为62至91 mg/100g。研究结果表明,与其他季节相比,冬季鱼中的总固醇含量通常较低。

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