Knowledge Management System Of South China Sea Institute of Oceanology,CAS
| Effects of salinity and copper co-exposure on copper bioaccumulation in marine rabbitfish Siganus oramin | |
| Zhou, YY; Zhang, W; Guo, ZQ; Zhang, L; zhangli@scsio.ac.cn | |
| 2017 | |
| Source Publication | CHEMOSPHERE
 |
| Volume | 168Pages:491-500 |
| Abstract | 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. |
| Department | [Zhou, Yanyan; Zhang, Wei; Guo, Zhiqiang; Zhang, Li] Chinese Acad Sci, Key Lab Trop Marine Bioresources & Ecol, Guangdong Prov Key Lab Appl Marine Biol, South China Sea Inst Oceanol, Guangzhou 510301, Guangdong, Peoples R China; [Zhou, Yanyan] Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| Keyword | Copper Fish Bioaccumulation Salinity Dietary Uptake Biokinetic Modeling |
| Funding Project | LMB |
| Document Type | 期刊论文 |
| Identifier | http://ir.scsio.ac.cn/handle/344004/16232 |
| Collection | 中科院海洋生物资源可持续利用重点实验室 |
| Corresponding Author | zhangli@scsio.ac.cn |
| Recommended Citation 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,&zhangli@scsio.ac.cn.(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. |
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| File Name/Size | DocType | Version | Access | License | ||
| Effects of salinity （1354KB） | 期刊论文 | 作者接受稿 | 开放获取 | CC BY-NC-SA | Application Full Text | |
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