Effects of Intermittent and Chronic Hypoxia on Fish Size and Nutrient Metabolism in Tiger Puffer (Takifugu rubripes)
文献类型： 外文期刊
作者： Ma, Qiang 1 ; Zhang, Renxiao 1 ; Wei, Yuliang 1 ; Liang, Mengqing 1 ; Xu, Houguo 1 ;
作者机构： 1.Chinese Acad Fishery Sci, Yellow Sea Fisheries Res Inst, State Key Lab Mariculture Biobreeding & Sustainabl, Qingdao 266071, Peoples R China
2.Qingdao Marine Sci & Technol Ctr, Lab Marine Fisheries Sci & Food Prod Proc, Qingdao 266237, Peoples R China
3.Ocean Univ China, Key Lab Aquaculture Nutr & Feed, Minist Agr, 5 Yushan Rd, Qingdao 266003, Peoples R China
关键词： intermittent hypoxia; chronic hypoxia; nutrients metabolism; hypoxia-inducible factor; marine deoxygenation
期刊名称：ANIMALS （ 影响因子：2.7； 五年影响因子：3.2 ）
ISSN： 2076-2615
年卷期： 2024 年 14 卷 17 期
页码：
收录情况： SCI
摘要： Intermittent and chronic hypoxia are common stresses to marine fish, but the different responses of fish to intermittent and chronic hypoxia have not been well-known. In this study, tiger puffers were farmed in normoxia conditions (NO, 6.5 +/- 0.5 mg/L), intermittent hypoxia (IH, 6.5 +/- 0.5 mg/L in the day and 3.5 +/- 0.5 mg/L in the night), or choric hypoxia (CH, 3.5 +/- 0.5 mg/L) conditions for 4 weeks, after which the growth, nutrient metabolism and three hif alpha isoforms expression were measured. Both intermittent and chronic hypoxia decreased the fish growth and visceral weight but increased the feed conversion ratio and blood hemoglobin content. Chronic hypoxia but not intermittent hypoxia promoted protein synthesis and whole-fish protein content by activating mtor gene expression and promoted the glycolysis pathway by activating gene expression of hif1 alpha and hif2 alpha. Intermittent hypoxia but not chronic hypoxia decreased the hepatic lipid synthesis by inhibiting fasn and srebf1 gene expression. Meanwhile, intermittent hypoxia reduced the monounsaturated fatty acid content but increased the n-3 polyunsaturated fatty acids percentage. The results of this study clarified the adaptive mechanism of tiger puffer to intermittent and chronic hypoxia, which provides important information about mechanisms of hypoxia adaption in fish.
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