Feeding reduces waterborne Cu bioaccumulation in a 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

	Feeding reduces waterborne Cu bioaccumulation in a marine rabbitfish Siganus oramin
	Guo, Zhiqiang; Zhang, Wei; Du, Sen; Zhou, Yanyan; Gao, Na; Zhang, Li; Green, Iain
刊名	ENVIRONMENTAL POLLUTION
	2016
卷号	208 页码:580-589
关键词	Trace metals Copper Metal uptake Waterborne metals Dietary metal Marine fish
通讯作者	Zhang, L (reprint author), Chinese Acad Sci, Guangdong Prov Key Lab Appl Marine Biol, South China Sea Inst Oceanol, Key Lab Trop Marine Bioresources & Ecol, Guangzhou 510301, Guangdong, Peoples R China.
中文摘要	Waterborne metal uptake has been extensively studied and dietary metal assimilation is increasingly recognized in fish, whilst the interaction between the two uptake routes is largely overlooked. This study compared the waterborne Cu bioaccumulation (Cu-65 as tracer) in a juvenile rabbitfish at different feeding regimes (starvation (SG), feeding normal diet (NDG) or diet supplemented with extra Cu (DCG)) to test the hypothesis that feeding can influence waterborne metal uptake in marine fish. NDG and DCG diet was fed as a single meal and then all fish were exposed to waterborne Cu-65 for 48 h, during which the time course sampling was conducted to determine Cu-65 bioaccumulation, chyme flow and dietary Cu assimilation. The results revealed that SG fish accumulated the highest Cu-65, followed by NDG (61% of SG), whilst DCG fish accumulated the lowest Cu-55 (34% of SG). These results suggested a protective effect of feeding against waterborne Cu bioaccumulation. This effect was most notable between 10 min and 16 h when there was chyme in gastrointestinal tract (GT). Dietary Cu assimilation mainly occurred before 16 h after feeding. Waterborne Cu-65 influx rate in the GT was positively correlated with Cu-65 contents of chyme in NDG, whereas it was largely negatively correlated with Cu-65 contents of chyme in DCG. The waterborne Cu uptake in the GT was mainly influenced by the chyme flow and dietary Cu assimilation. Overall, our findings suggested that feeding has an important effect on waterborne metal uptake and that both the feeding status of the fish and the relative metal exposure through water and food should be considered in prediction of the metal bioaccumulation and biomonitoring programs. (C) 2015 Elsevier Ltd. All rights reserved.
学科主题	Environmental Sciences & Ecology
内容类型	期刊论文
源URL	[http://ir.scsio.ac.cn/handle/344004/15540]
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	Guo, Zhiqiang,Zhang, Wei,Du, Sen,et al. Feeding reduces waterborne Cu bioaccumulation in a marine rabbitfish Siganus oramin[J]. ENVIRONMENTAL POLLUTION,2016,208:580-589.
APA	Guo, Zhiqiang.,Zhang, Wei.,Du, Sen.,Zhou, Yanyan.,Gao, Na.,...&Green, Iain.(2016).Feeding reduces waterborne Cu bioaccumulation in a marine rabbitfish Siganus oramin.ENVIRONMENTAL POLLUTION,208,580-589.
MLA	Guo, Zhiqiang,et al."Feeding reduces waterborne Cu bioaccumulation in a marine rabbitfish Siganus oramin".ENVIRONMENTAL POLLUTION 208(2016):580-589.