Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2023, Vol. 39 ›› Issue (23): 102-108.doi: 10.11924/j.issn.1000-6850.casb2022-0593

Special Issue: 生物技术 水产渔业

Previous Articles     Next Articles

Analysis and Evaluation of Nutritive Composition in Muscles of Cultured Leiocassis longirostris at Different Ages

ZHAO Zhongmeng1(), ZHOU Jian1, LI Qiang1, WEI Zhen2, KE Hongyu1, ZHAO Han1, DUAN Yuanliang1, HUANG Zhipeng1, WU Lixiao3, ZHANG Lu1()   

  1. 1Fisheries Institute, Sichuan Academy of Agricultural Sciences, Chengdu 611730
    2The Sichuan Rare and Endemic Fish Conservation and Utilization Center, Chongzhou, Sichuan 611200
    3The Agricultural and Rural Bureau of Linshui County, Guang’an, Sichuan 638500
  • Received:2022-07-21 Revised:2022-11-01 Online:2023-08-15 Published:2023-08-10

Abstract:

In this experiment, different age stages of L. longirostris were used as the research object. By measuring their muscle nutrients, the differences in muscle nutrition of different age stages were compared, and their muscle quality characteristics were scientifically evaluated. The results showed that with the increase of age, the moisture content decreased, whereas the contents of crude fat increased. The crude protein content in the muscle of the 2-year-old L. longirostris was significantly higher than that of the 3-year-old (P<0.05). In addition, the contents of calcium and phosphorus in L. longirostris muscles decreased with fish growth. Lysine was the highest essential amino acid and glutamate was the highest flavorful amino acid in their muscles. In muscle quality analysis, according to the amino acid and chemistry score, the first limiting amino acids were Methionine and cysteine, the second limiting amino acids were valine in the muscle of the different age stages. The results of nutritional quality evaluation showed that the essential amino acid index was the highest at 2 -year-old group. The types and contents of fatty acids were different in different age groups, but the content of Saturated fatty acid was significantly lower than that of unsaturated fatty acids (P<0.05).The content of monounsaturated fatty acids in polyunsaturated fatty acids was significantly higher in 2-year-old group, and the content of polyunsaturated fatty acids was significantly higher in 3-year-old group. These results indicate that L. longirostris is a kind of high nutritional value, delicious, and high quality fish, and that L. longirostris in 2-year-old stage is the best, because of higher contents of crude protein and crude fat, better amino acid and fatty acid compositions in muscle.

Key words: Leiocassis longirostris, different ages, muscle, nutrient components