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Chinese Agricultural Science Bulletin ›› 2025, Vol. 41 ›› Issue (5): 151-156.doi: 10.11924/j.issn.1000-6850.casb2024-0511

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Comparison and Analysis of Muscle Nutritional Components of Male and Female Opsariichthys bidens

LI Wensheng()   

  1. Freshwater Fisheries Research Institute of Fujian, Fuzhou 350002
  • Received:2024-08-13 Revised:2024-11-06 Online:2025-02-15 Published:2025-02-11

Abstract:

The aim was to explore the differences in nutritional components of muscle between male and female Opsariichthys bidens, providing theoretical basis for breeding selection and nutritional evaluation of Opsariichthys bidens. Using biochemical analysis methods, nutrient contents in muscle of 2-year-old male and female Opsariichthys bidens with body weights of (32.48±5.78) g and (78.31±8.79) g were determined, and the nutritional value of them was analyzed and compared. The results showed that the content of crude fat in females was significantly higher than that of males (P<0.05); There were no significant difference in moisture, crude protein and crude ash content between the two groups (P>0.05). The mineral content had significant difference. The contents of potassium and iron in the detected minerals were significantly higher in males than those in females (P<0.05), and the contents of other minerals in females were significantly higher than those in males. 16 kinds of amino acids were detected in both female and male fish, and there was no significant difference in the contents of various amino acids; the essential amino acids, total amino acids and flavor amino acids in females were higher than those in males, but there was no significant difference. According to amino acid score (AAS) and chemical score (CS), the first limiting amino acid for both females and males was Met+Cys, and the second limiting amino acid was Val. The essential amino acid index (EAAI) of females (90.15) was higher than that of males (86.10). Total of 24 and 22 fatty acids were detected in female and male. The contents of saturated fatty acids and monounsaturated fatty acids in males were significantly higher than those in females (P<0.05), and the polyunsaturated fatty acids in females were significantly higher than those in males (P<0.05). Among the detected fatty acids, the content of oleic acid (C18:1) was the highest, followed by linoleic acid (C18:2). Erucic acid (C22:1) and tetracosenoic acid (C24:1) were not detected in male fish. During the growth process of male and female Opsariichthys bidens, the composition and content of some nutrients were different. On the whole, the nutrients of female are more abundant than those of male. However, in actual production, due to the rapid growth of male, the breeding cycle is short, the growth rate of male fish is 2-3 times faster than that of female, and the body mass is more than 50% higher than that of female. Therefore, the all-male breeding of fish still has certain significance.

Key words: Opsariichthys bidens, muscle, amino acid, fatty acid, nutritional evaluation, breeding selection