Sun Yuyan, Shan Xin, Li Desheng, Liu Xuxiao, Han Zongao, Qin Junjie, Guan Bin, Tan Leilei, Zheng Jianbo, Wei Min, Jia Yongyi
Jiangsu Key Laboratory of Marine Biological Resources and Environment/Jiangsu Key Laboratory of Marine Biotechnology, Jiangsu Ocean University, Lianyungang 222000, China.
Key Laboratory of Healthy Freshwater Aquaculture, Ministry of Agriculture and Rural Affairs/Key Laboratory of Freshwater Aquaculture Genetic and Breeding of Zhejiang Province, Zhejiang Institute of Freshwater Fisheries, Huzhou 313000, China.
Metabolites. 2023 Jan 28;13(2):190. doi: 10.3390/metabo13020190.
Redclaw crayfish () was introduced to China many years ago. In recent years, a breeding boom for has been set off in China due to a breakthrough in key technology of seedling breeding. The size and growth rate of vary greatly between female and male individuals, usually the size and growth rate of male individuals are bigger than that of female individuals. There is usually a certain linkage relationship between the sex traits of crustaceans and their own nutrition. In order to explore the linkage relationship between the sex traits of and its nutritional components, this study measured and analyzed the muscle nutritional components of female and male individuals. The results showed that the meat yield rate of male individuals was significantly higher than that of females ( < 0.05), and the crude fat content was significantly lower than that for females ( < 0.05). The ratios of essential amino acids to total amino acids for females and males were 39.61% and 38.49%, respectively. The ratios of essential amino acids to non-essential amino acids were 79.69% and 75.66%, respectively, which far exceed FAO/WHO standards and both belong to high-quality protein. The total amount of flavor amino acids of male individuals was significantly higher than that of female individuals ( < 0.05). The total amount of polyunsaturated fatty acids and the polyunsaturated fatty acid eicosapentaenoic acid of males are both significantly higher than that of females ( < 0.05). Studies have shown that there are certain differences in nutrition between male and female individuals. Compared with female individuals, the meat yield rate, crude protein content, and edible value of the muscles of male individuals is higher.
红螯螯虾多年前被引入中国。近年来，由于苗种繁育关键技术取得突破，在中国引发了红螯螯虾的养殖热潮。红螯螯虾雌雄个体在大小和生长速度上差异很大，通常雄性个体的大小和生长速度比雌性个体大。甲壳类动物的性别特征与其自身营养之间通常存在一定的关联关系。为了探究红螯螯虾性别特征与其营养成分之间的关联关系，本研究对雌雄个体的肌肉营养成分进行了测定和分析。结果表明，雄性个体的肉产率显著高于雌性（P<0.05），粗脂肪含量显著低于雌性（P<0.05）。雌性和雄性的必需氨基酸与总氨基酸的比例分别为39.61%和38.49%。必需氨基酸与非必需氨基酸的比例分别为79.69%和75.66%，均远远超过粮农组织/世界卫生组织标准，均属于优质蛋白质。雄性个体的风味氨基酸总量显著高于雌性个体（P<0.05）。雄性个体的多不饱和脂肪酸总量和多不饱和脂肪酸二十碳五烯酸均显著高于雌性（P<0.05）。研究表明，雌雄个体在营养方面存在一定差异。与雌性个体相比，雄性个体的肉产率、肌肉粗蛋白含量和食用价值更高。
