Effects of salinity and copper co-exposure on copper bioaccumulation in marine rabbitfish Siganus oramin

CORC > 南海海洋研究所 > 中国科学院南海海洋研究所 > 中科院海洋生物资源可持续利用重点实验室

	Effects of salinity and copper co-exposure on copper bioaccumulation in marine rabbitfish Siganus oramin
	Zhou, YY; Zhang, W; Guo, ZQ; Zhang, L
刊名	CHEMOSPHERE
	2017
卷号	168 页码:491-500
关键词	Copper Fish Bioaccumulation Salinity Dietary uptake Biokinetic modeling
通讯作者	zhangli@scsio.ac.cn
中文摘要	Marine fish living in estuaries and coastal areas commonly encounter the stress of both salinity and metal pollution. In this study, euryhaline rabbitfish Siganus oramitt were exposed to 50 mu g L-1 waterborne Cu or 300 mu g g(-1) dry wt dietary Cu at salinity 33 parts per thousand, 25 parts per thousand, 20 parts per thousand, 10 parts per thousand, and 5 parts per thousand for 30 days. The Cu accumulation in the liver (>20-fold increase) and intestine (>5-fold increase) significantly increased after either waterborne or dietary Cu acclimation. Moreover, Cu accumulation was further enhanced in the liver, intestine, plasma, and whole body of Cu-exposed fish at lower salinities. Similarly, the waterborne Cu uptake rate constants (k(u)s) were stable in the control at different salinities but increased significantly (2-4 times higher) after waterborne Cu exposure. Conversely, the dietary Cu assimilation efficiencies (AEs) were significantly lower in the dietary Cu-exposed fish (3-5%) than in the control fish (8-16%) at different salinities, suggesting that dietary Cu acclimation partially alleviated the dietary Cu uptake from the high-Cu diet. The Cu efflux rate constants (Ices) were comparable among all treatments as 0.060 -0.071 d(-1). The changes of Cu accumulation by different salinities and Cu exposure were well estimated by the biokinetic modeling. In summary, the present study indicates that rabbitfish can regulate Cu uptake and accumulation when acclimated to different salinities, but the Cu-exposed rabbitfish failed to prevent the elevation of Cu accumulation at low salinities. It therefore suggested that the concurrence of low salinity and high Cu exposure enhances the risks of Cu bioaccumulation and toxicity in rabbitfish. (C) 2016 Elsevier Ltd. All rights reserved.
内容类型	期刊论文
源URL	[http://ir.scsio.ac.cn/handle/344004/16232]
专题	南海海洋研究所_中科院海洋生物资源可持续利用重点实验室
推荐引用方式 GB/T 7714	Zhou, YY,Zhang, W,Guo, ZQ,et al. Effects of salinity and copper co-exposure on copper bioaccumulation in marine rabbitfish Siganus oramin[J]. CHEMOSPHERE,2017,168:491-500.
APA	Zhou, YY,Zhang, W,Guo, ZQ,&Zhang, L.(2017).Effects of salinity and copper co-exposure on copper bioaccumulation in marine rabbitfish Siganus oramin.CHEMOSPHERE,168,491-500.
MLA	Zhou, YY,et al."Effects of salinity and copper co-exposure on copper bioaccumulation in marine rabbitfish Siganus oramin".CHEMOSPHERE 168(2017):491-500.