Effects of Cold Stress on Skin Color, Immuno-Antioxidant Function, Muscle Compositions, and Intestinal Microbiota of Red Tilapia During Overwintering

文献类型： 外文期刊

第一作者： Yang, Hao-ran

作者： Yang, Hao-ran;Munyaradzia, Herbert Brightmore;Zhu, Wen-bin;Dong, Zai-jie;Wang, Lan-mei;Zhu, Wen-bin;Dong, Zai-jie;Wang, Lan-mei

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关键词： cold stress; immuno-antioxidant; intestinal microbiota; red tilapia; skin color

期刊名称：AQUACULTURE RESEARCH （ 影响因子：1.9； 五年影响因子：2.2 ）

ISSN： 1355-557X

年卷期： 2025 年 2025 卷 1 期

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收录情况： SCI

摘要： Cold stress due to overwintering is considered a major issue limiting the development of the red tilapia (Oreochromis spp.) industry. This study was the first to systematically investigate the effects of cold stress on skin color, immuno-antioxidant function, muscle compositions, and intestinal microbiota of red tilapia during overwintering. Fish (initial weight: 72.71 +/- 1.32 g) were divided into the cold stress group (cold) and the control group. In the control group, the water temperature (WT) was maintained at 20 degrees C, which is consistent to with the overwintering WT indoors or greenhouse in the local area. In the cold group, the WT was decreased from 20 degrees C to 8 degrees C by 2 degrees C per day during the experiment. At the end of the experiment, we found that the L-& lowast; value of fish ventral skin in the cold group was lower than that in the control group (p < 0.05). The superoxide dismutase (SOD), malondialdehyde (MDA), glutathione (GSH), catalase (CAT), and total antioxidant capacity (T-AOC) activities were higher, but complement 3 (C3) and complement 4 (C4) activities were lower in the liver of cold group fish than those in the control group (p < 0.05). For the gill tissue, the SOD, MDA, and GSH activities were higher, but the C3 activity was lower in the cold group than those in the control group (p < 0.05). The total amino acid (TAA) content in the muscle of fish in the cold group was higher than that in the control group (p < 0.05). 16 s rRNA analysis showed that the intestinal microbial abundance and alpha diversity of fish in the cold group decreased (p < 0.05). Component analysis revealed a significantly higher relative abundance of Cetobacterium spp. in the fish of the cold group. The findings of this study will provide a valuable understanding of fish cold stress during overwintering, which will contribute to facilitating the breeding of new cold-resistant varieties of red tilapia in the future.

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