Page 132 - 《渔业研究》2025年第6期

第 6 期 李昌辉： 不同养殖模式下大黄鱼形体、抗氧化能力及肌肉品质的比较 823

A comparative study on body morphology, antioxidant capacity, and muscle
quality of large yellow croaker (Larimichthys crocea) under
different culture systems

LI Changhui
(Fujian Tianma Science and Technology Group Co. Ltd., Fuzhou 350308, China)

Abstract: [Background] In recent years, the muscle nutritious quality and texture characteristics of large yel-
low croaker (Larimichthys crocea), which are mainly cultured in nearshore cages, have shown a downward
trend. The deep-water cage can simulate the natural ecological environment, which helps to enhance the nutri-
tional value of L. crocea. [Objective] This study aims to systematically evaluate the comprehensive benefits of
offshore deep-water cage culture system. [Methods] In January 2025, thirty L. crocea with similar body mass
from offshore deep-water cage-cultured, nearshore cage-cultured, and wild populations (10 ind for each culture
system) were collected for the comparative analysis of differences in body morphology indices, muscle texture
and nutritional quality, and serum antioxidant capacity. [Results] In body morphology indices, the condition
factor and muscle hardness of L. crocea cultured in offshore deep-water cages were similar to those of wild
L. crocea, but significantly better than those of nearshore cage-cultured L. crocea(P<0.05). In terms of antioxid-
ant capacity, the offshore deep-water cage-cultured L. crocea had significantly higher catalase activity (CAT)
and total antioxidant capacity (T-AOC) than nearshore cage-cultured L. crocea (P<0.05), and showed no signi-
ficant differences from wild L. crocea (P>0.05). In terms of muscle composition, the crude lipid content of
L. crocea cultured in offshore deep-water cages was significantly higher than that of wild L. crocea, but lower
than that of nearshore cage-cultured L. crocea (P<0.05). However, there were no sigmficant differences in crude
protein content between offshore deep-water cage-cultured group and the other two groups. In terms of fatty
acid conposition, the content of C18:0 in muscle of L. crocea cultured in offshore deep-water cages was signi-
ficantly lower than that of wild L. crocea (P<0.05), while the content of C16:1n-7 was significantly higher
(P<0.05). Additionally, there were no significant differences in the contents of C20:5n-3 (EPA), C22:6n-3
(DHA), saturated fatty acids (∑SFA), monounsaturated fatty acids (∑MUFA), and n-6 and n-3 polyunsaturated
fatty acids (∑n-6 PUFA, ∑n-3 PUFA) between offshore deep-water cage-cultured and wild L. crocea (P>0.05).
Amino acid analysis revealed that the contents of Thr, Met, Leu, Val, Glu, Gly, Ala, Asp, and Ser in L. crocea
cultured in offshore deep-water cages were comparable to that of wild L. crocea (P>0.05), while the contents of
essential amino acids (EAA), flavor amino acids (FAA), and total amino acids (TAA) were significantly higher
than that of nearshore cage-cultured L. crocea (P<0.05). [Conclusion] In summary, the offshore deep-water
cage culture system can significantly improve the body morphology indices, antioxidant capacity, muscle tex-
ture, fatty acid composition, and amino acid nutritional value of L. crocea, making their overall quality closer to
wild L. crocea, indicating that this culture system has significant potential for the production of high-quality
L. crocea. The findings of the study deliver both theoretical and practical support for enhancing the quality of
L. crocea aquaculture and optimizing intensive farming techniques.
Key words: culture systems; large yellow croaker (Larimichthys crocea); body morphology; antioxidant
capacity; muscle texture; nutritional composition