克氏原螯虾含肉率及蜕皮周期中微量元素分析

Dressed Crayfish and Microelement Levels in Procambarus clarkii During Ecdysis

以南京地区的克氏原螯虾为研究对象,测试了不同地点、不同月份的克氏原螯虾的含肉率,以及同时期部分小虾和超大型虾的含肉率,分析了螯虾的营养成份,并测试了蜕皮周期中的虾体不同部位的微量元素。结果表明:克氏原螯虾的含肉率与食料的丰欠、季节的不同有很大的关系,人工饲养的螯虾含肉率是野外生长的1.4倍,春季含肉率最高,可达(15.33±2.31)%,秋季含肉率最低,仅(5.38±2.15)%,雌雄螯虾含肉率总体差别不显著,雌性比雄性略高。另外,蜕皮周期中克氏原螯虾不同部位的几种微量元素含量变化明显,在螯虾饲料中添加适量的微量元素,有助于螯虾的生长、发育。文章最后还比较了红、青壳螯虾的含肉率及营养成份,青壳螯虾的含肉率较红壳螯虾的高出1.6倍,但红壳螯虾食用价值更高。

Dressed crayfish and micro element levels were determined in different parts of small and big red carapace and green carapace crayfish （Procambarus clakii） at various places of Nanjing China during ecdysis cycle. The results showed that the dressed rate was 40% higher in the cultivated crayfish than in wild one, with a maximum of 1（5.33± 2.31% in Spring ,and a minimum of （5.38 ±2.15）% in Fall. The dressed red carapace crayfish was 60% higher than the green carapace crayfish.