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Sexual dimorphism in physiological responses of turbot (Scophthalmus maximus L) under acute hypoxia and reoxygenation

文献类型： 外文期刊

作者： Chen, Shuaiyu 1 ; Wang, Feng 1 ; Song, Jialing 1 ; Li, Feixia 1 ; Wang, Jiawei 1 ; Jia, Yudong 1 ;

作者机构： 1.Chinese Acad Fishery Sci, Yellow Sea Fisheries Res Inst, 106 Nanjing Rd, Qingdao 266071, Peoples R China

2.Shanghai Ocean Univ, Coll Fisheries & Life Sci, Shanghai 201306, Peoples R China

3.Tianjin Agr Univ, Coll Fisheries, Tianjin 300384, Peoples R China

4.Qingdao Marine Sci & Technol Ctr, Lab Marine Fisheries Sci & Food Prod Proc, Qingdao 266237, Shandong, Peoples R China

关键词： Hypoxia; Hematological and biochemical response; Oxidative stress; Gill and liver histology; Turbot Scophthalmus maximus L

期刊名称：AQUACULTURE （ 影响因子：3.9； 五年影响因子：4.4 ）

ISSN： 0044-8486

年卷期： 2025 年 595 卷

页码：

收录情况： SCI

摘要： Dissolved oxygen (DO) is a crucial factor throughout fish life cycle. In this study, the hematology, hepatic antioxidant levels, histomorphology of the liver and gill were determined in both female and male turbot under acute hypoxia to evaluated the underlying mechanisms and potential sexual dimorphism difference. Results showed that acute hypoxia stress treatment for 3 h significantly increased plasma cortisol, glucose, hemoglobin (HGB), cholesterol (CHO), triglycerides (TG), low-density lipoprotein (LDL), high-density lipoprotein (HDL) and hepatic malondialdehyde (MDA) contents, red blood cell count (RBC) number, hepatic superoxide dismutase (SOD), glutathione peroxidase (GSH-Px), catalase (CAT), alanine-aminotransferase (ALT) and aspartateaminotransferase (AST) activity in both male and female turbot. Male obtained higher plasma CHO, TG and LDL contents, GSH-Px and SOD activity than female under hypoxia. Meanwhile, hypoxia increased gill respiratory frequency, secondary lamellar length, secondary lamellar width, perimeter, lamellar surface area and gill surface area and decreased interlamellar distance. Acute hypoxia induced clubbing, hyperplasia, hypertrophy of gill filaments and hepatic vacuolization in both male and female turbot. The aforementioned parameters were recovered to normal levels after reoxygenation for 12 h. In conclusion, sex dimorphism difference of turbot hematological (RBC, HGB) and biochemical (glucose, CAT, GSH-Px, MDA) parameters were observed under hypoxia stress, while male demonstrated more hypoxia tolerance than female. These results help understand turbot hypoxia tolerance mechanisms and provide more data for management in captivity.

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