Accumulated CO<sub>2</sub> affects growth, acid-base regulation and ion balance of turbot <i>(Scophthalmus maximus)</i> in a recirculating aquaculture system

doi:10.1016/j.aquaculture.2023.740070

IOCAS-IR > 实验海洋生物学重点实验室

	*Accumulated CO₂ affects growth, acid-base regulation and ion balance of turbot (Scophthalmus maximus)* in a recirculating aquaculture system**
	Guo, Teng 3,4; Wang, Yanfeng 1,2; Li, Jiyuan1,2,5 ; Guo, Xiaoyang 8; Xu, Shihong 1,2; Han, Houwei 7; Yu, Jiachen6 ; Li, Jun 1,2; Liu, Qinghua 1,2
	2024-01-15
发表期刊	AQUACULTURE
ISSN	0044-8486
卷号	578 页码:15
通讯作者	Wang, Yanfeng([email protected]) ; Liu, Qinghua([email protected])
摘要	The major advantage of recirculating aquaculture systems (RAS) is the ability to manipulate and control environmental variables to optimize production efficiency. However, the characteristics of water recycling and high-density aquaculture in RAS may result in the rapid accumulation of carbon dioxide (CO2) when raising high-density marine fish. This study aimed to evaluate the effects of CO2 on growth-related parameters, tissue structure, acid-base homeostasis, and ion regulation in turbot (Scophthalmus maximus). Turbot were subjected to five different CO2 treatments (C, 8, 16, 24, and 32 mg/L) at a temperature of 14.C for durations of 7, 15, 30, and 60 days. The results indicated a substantial reduction in specific growth rate with increasing duration of CO2 exposure, accompanied by a significant increase in feed conversion rate. Exposure to CO2 also triggered the deposition of lipids or glycogen in the turbot liver, inhibiting the expression of growth factors. Additionally, it caused dissolution of the intestinal lamina propria and vacuolation of the intestinal mucosa. Even exposure to low levels of CO2 (8 mg/L) caused damage to the turbot gill tissue. Plasma analysis of turbot showed significantly higher concentrations of plasma HCO3- and significantly lower concentrations of Na+ and Cl-. Plasma HCO3- concentrations reached a maximum of 33.35 +/- 0.13 mmol/L in the 32 mg/L treatment, and genes related to osmoregulation and acid-base homeostasis in the gill (H+-ATPase, NBCI, CA, AE, NHE1, NHE2) were altered based on the duration of CO2 exposure. The kidney did not exhibit significant damage throughout the experiment, and genes related to renal osmoregulation and acid-base homeostasis (AE, NBCI, NHE3, CAII, CAIV) were significantly elevated with CO2 exposure compared to the control group. These findings indicate that prolonged exposure to CO2 has a severe impact on feeding, resulting in damage to the liver and intestinal tissues, stress within the fish body, and disrupted expression of key genes related to the growth hormone/insulin-like growth factor axis. The study highlights the significance of monitoring CO2 concentrations in RAS for optimal marine fish health, as even concentrations below the 8 mg/L threshold have an impact on turbot. The involvement of turbot kidneys strengthens their buffering capacity against CO2, but CO2 stress still affects the gut and growth axis due to ion exchange and the progression of the HCO3 buffering system, leading to growth inhibition. Overall, this study provides valuable insights into the effects of CO2 exposure on turbot aquaculture and underscores the importance of monitoring CO2 concentrations in RAS to ensure optimal health of marine fish. [GRAPHICS] .
关键词	Turbot Carbon dioxide Growth Acid -base homeostasis Ion regulation
DOI	10.1016/j.aquaculture.2023.740070
收录类别	SCI
语种	英语
资助项目	Agriculture Research System of China[CARS -47-G21]
WOS研究方向	Fisheries ; Marine & Freshwater Biology
WOS类目	Fisheries ; Marine & Freshwater Biology
WOS记录号	WOS:001075091800001
出版者	ELSEVIER
WOS关键词	SALMON SALMO-SALAR ; ELEVATED CARBON-DIOXIDE ; FRESH-WATER FISH ; GENE-EXPRESSION ; RAINBOW-TROUT ; NA+/HCO3-COTRANSPORTERS ; CYPRINUS-CARPIO ; GADUS-MORHUA ; ADULT SALMON ; ATLANTIC COD
引用统计
文献类型	期刊论文
条目标识符	http://ir.qdio.ac.cn/handle/337002/181722
专题	实验海洋生物学重点实验室
通讯作者	Wang, Yanfeng; Liu, Qinghua
作者单位	1.Chinese Acad Sci, Inst Oceanol, Ctr Ocean Mega Sci, Key Lab Expt Marine Biol, Qingdao 266071, Peoples R China 2.Qingdao Natl Lab Marine Sci & Technol, Lab Marine Biol & Biotechnol, Qingdao 266071, Peoples R China 3.Ocean Univ China, Coll Marine Life Sci, Qingdao 266003, Peoples R China 4.Ocean Univ China, Inst Evolut & Marine Biodivers, Qingdao 266003, Peoples R China 5.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 6.Jiangsu Ocean Univ, Sch Marine Sci & Fisheries, Lianyungang 222005, Jiangsu, Peoples R China 7.Conson Oriental Yantai Recirculating Aquaculture T, Yantai 264000, Peoples R China 8.Qingdao Agr Univ, Coll Life Sci, Qingdao 266109, Peoples R China
通讯作者单位	中国科学院海洋研究所
推荐引用方式 GB/T 7714	Guo, Teng,Wang, Yanfeng,Li, Jiyuan,et al. Accumulated CO₂ affects growth, acid-base regulation and ion balance of turbot (Scophthalmus maximus) in a recirculating aquaculture system[J]. AQUACULTURE,2024,578:15.
APA	Guo, Teng.,Wang, Yanfeng.,Li, Jiyuan.,Guo, Xiaoyang.,Xu, Shihong.,...&Liu, Qinghua.(2024).Accumulated CO₂ affects growth, acid-base regulation and ion balance of turbot (Scophthalmus maximus) in a recirculating aquaculture system.AQUACULTURE,578,15.
MLA	Guo, Teng,et al."Accumulated CO₂ affects growth, acid-base regulation and ion balance of turbot (Scophthalmus maximus) in a recirculating aquaculture system".AQUACULTURE 578(2024):15.