Journal of Zhejiang Agricultural Sciences ›› 2024, Vol. 65 ›› Issue (10): 2486-2494.DOI: 10.16178/j.issn.0528-9017.20240318

Previous Articles     Next Articles

Correlation analysis of muscle amino acid composition with gender, body weight and gonad index in yellow perch (Perca flavescens)

HUANG Yizhong1,2(), ZHANG Siqi1, XIE Zhigang2,*()   

  1. 1. College of Life Science, Zhejiang Normal University, Jinhua 321004,Zhejiang
    2. Institute of Hydrobiology, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021,Zhejiang
  • Received:2024-04-19 Online:2024-10-11 Published:2024-10-25

Abstract:

Yellow perch (Perca flavescens) displays noticeable allometric growth differences between genders, with the females exhibiting faster growth rates than the males. This study aimed to investigate the relationship between muscle amino acid composition and gender, body weight, and gonadosomatic index (GSI). The research involved analyzing the nutritional components and 17 amino acid contents of the muscle in a group of second-year yellow perch from the same hatching cohort. The findings indicated that there were no gender variations in the conventional nutritional components of Perca flavescens muscle, except for histidine content, which was significantly higher in the males compared with the females (P<0.05) among the amino acid composition. Upon amino acid assessment(AAS), isoleucine emerged as the first limiting amino acid in female fish, while methionine + cysteine served as the first limiting amino acid in the males. Both male and female fish had methionine + cysteine as the foremost limiting amino acid based on chemical scores(CS). Pearson correlation analysis demonstrated positive correlations between leucine, isoleucine and lysine levels in female fish muscle with body weight (P<0.05), as well as positive correlations between all amino acid contents except for glycine, alanine, cysteine, and histidine with GSI (P<0.05). Linear regression analysis revealed significant positive linear correlations between human essential amino acids, fish essential amino acids and body weight, as well as between total amino acids, umami amino acids and GSI in female fish (P<0.05). However, no significant correlations were found between muscle-related amino acid indicators in male fish and body weight or GSI. In summary, there is minimal gender disparity in the amino acid composition of cultured Perca flavescens muscle. The females of the same age, who exhibit faster growth and higher body weight, possess relatively greater muscle amino acid nutritional value, which escalates with GSI. Conversely, the relationship between muscle amino acid nutritional value and body weight or GSI in the males of the same age is less apparent, with some amino acid indicators showing a declining trend.

Key words: yellow perch(Perca flavescens), amino acid composition, gender, body weight, gonadosomatic index, muscle

CLC Number: