Page 120 - 《水产学报》2025年第5期

于俊琦，等 水产学报, 2025, 49(5): 059610

Dynamic changes of growth, digestion, metabolism, antioxidant and
immune ability of Siniperca chuatsi during overwintering period

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YU Junqi , LU Hua , CHEN Qiqi , WANG Wenjie , CHEN Yushuang , ZHOU Da ,
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LI Yong , LUO Hao , ZHAI Xuliang , XUE Yang , LUO Jinqiang ,
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CHEN Yongjun , ZHAO Min , LUO Li 1*
1. Key Laboratory of Freshwater Fish Resources and Reproductive Development, Ministry of Education,
Integrative Science Center of Germplasm Creation in Western China (Chongqing) Science City,
College of Fisheries, Southwest University, Chongqing 400715, China;
2. New Hope Liuhe Co., Ltd., Chengdu 610023, China;
3. Chongqing Aquatic Technology Promotion Station, Chongqing 400700, China;
4. Tongnan District of Chongqing Agricultural Science and Technology Extension Center, Chongqing 402660, China
Abstract: In order to investigate the physiological dynamic changes in growth, digestion, metabolism, antioxidant, and immune
ability of Siniperca chuatsi during the overwintering period, 240 S. chuatsi with a body weight of (107.63±0.48) g were selec-
ted and divided into growth and sampling groups with four replicates per group and 30 fish per replicate. Feed once every two
days for 112 days. During this period, the water temperature experienced a cooling period of 14.5–7.5 °C (0–6 weeks) and a
warming period of 7.5–14.5 °C (6–16 weeks). Seven sampling points were set at 0 (0-week), 2 weeks (2-week), 4 weeks (4-
week), 6 weeks (6-week), 8 weeks (8-week), 12 weeks (12-week), and 16 weeks (16-week). The results showed that the weight
gain rate (WGR), specific growth rate (SGR) and feeding rate (FR) decreased gradually and then increased gradually after
reaching their lowest values at 6-week. The feed coefficient increased significantly at 6-week and then decreased. The
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activity of the gastric proton pump (H -K -ATPase), intestinal trypsin, and amylase increased after a decrease of 6-week. The
liver total antioxidant capacity and superoxide dismutase activity decreased significantly at 6-week, while malondialdehyde
content increased significantly. The plasma acid phosphatase activity, immunoglobulin content, and spleen immunoglobulin
content decreased significantly and then increased. At 8-week, the liver structure begins to show partial nuclear migration to the
periphery of hepatocytes and vacuolar degeneration. At 16-week, the S. chuatsi liver cells had an irregular morphology and dis-
appeared or even dissolved nuclei. The intestinal villi at 8-week were lower, sparser, and irregular than those at 0-week, and the
development of intestinal villi at 16-week was better than that at 0-week and 8-week. In conclusion, the digestive, antioxidant,
and immune abilities of S. siniperca in the early overwintering period were weakened, the body weight of S. siniperca in the
late overwintering period was significantly increased, and liver structure and function were seriously damaged. This study
provides a theoretical basis for the management of S. chuatsi feeding and breeding during overwintering period, and promotes
the high-quality development of the S. chuatsi farming industry.
Key words: Siniperca chuatsi; low water temperature; overwintering period; anti-oxidation; immune capacity; digestion and
metabolism; physiological change
Corresponding authors: LUO Li. E-mail: luoli1972@163.com;
ZHAO Min. E-mail: zhaomin4@newhope.cn
Funding projects: Project of New Hope Liuhe Co., Ltd.; Chongqing Ecological Fishery Industry Technology System Project;
Chongqing Aquatic Science and Technology Innovation Alliance Project (CQFTIU2022-04); Tongnan District Research
Project of Chongqing (TK-2024-47)

中国水产学会主办 sponsored by China Society of Fisheries https://www.china-fishery.cn
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