Feeding ratio and frequency affects cadmium bioaccumulation in black sea bream Acanthopagrus schlegeli
Guo, Zhiqiang1; Zhang, Wei1; Zhou, Yanyan1; Gao, Na1; Zhang, Li1; zhangli@scsio.ac.cn
2015
发表期刊AQUACULTURE ENVIRONMENT INTERACTIONS
卷号7期号:2页码:135-145
摘要Feeding ratio and frequency have substantial effects on food digestion and assimilation in fish, yet few attempts have been made to determine their influences on the bioaccumulation of trace metals. In this study, juvenile Acanthopagrus schlegeli were exposed to either water-borne or dietary cadmium (Cd) at different feeding ratios (0, 2, or 4% body weight d(-1) [BW d(-1)] under waterborne Cd exposure and 1, 2.5, or 4% BW d(-1) under dietary Cd exposure) or feeding frequencies (1, 2 or 8 times d(-1)) for 5 wk. Under waterborne Cd exposure, the fish fed 0% BW d(-1) or 8 times d(-1) showed significantly lower growth rates and those fed 0% BW d(-1) or 1 time d(-1) exhibited higher Cd body burdens and Cd uptake rates compared to the other groups. The gut showed a significantly higher waterborne Cd uptake rate than the gills when fish were fasted or fed only 1 time d(-1). These results suggest that starvation and low feeding frequency facilitate waterborne Cd uptake. Under dietary Cd exposure, the fish fed 4% BW d(-1) or 2 times d(-1) grew faster. Cd body burden and Cd assimilation were higher in fish fed 2.5% BW d(-1) or 2 times d(-1). Dietary Cd retention was positively correlated with feed efficiency, suggesting the utilization of Cd probably coincides with the essential nutrients in fish. Overall, this study demonstrates that different feeding strategies significantly influence waterborne and dietary Cd bioaccumulation in marine fish. Therefore, feeding conditions have to be considered carefully for managing trace metal contamination in marine fish farming.
部门归属LMB
关键词Feeding Strategy Trace Metals Metal Uptake Metal Assimilation Marine Fish
学科领域Fisheries ; Marine & Freshwater Biology
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文献类型期刊论文
条目标识符http://ir.scsio.ac.cn/handle/344004/14887
专题中科院海洋生物资源可持续利用重点实验室
通讯作者zhangli@scsio.ac.cn
作者单位1.[Guo, Zhiqiang
2.Zhang, Wei
3.Zhou, Yanyan
4.Gao, Na
5.Zhang, Li] Chinese Acad Sci, South China Sea Inst Oceanol, Guangdong Prov Key Lab Appl Marine Biol, Key Lab Trop Marine Bioresources & Ecol, Guangzhou 510301, Guangdong, Peoples R China
6.[Zhou, Yanyan
7.Gao, Na] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
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Guo, Zhiqiang,Zhang, Wei,Zhou, Yanyan,et al. Feeding ratio and frequency affects cadmium bioaccumulation in black sea bream Acanthopagrus schlegeli[J]. AQUACULTURE ENVIRONMENT INTERACTIONS,2015,7(2):135-145.
APA Guo, Zhiqiang,Zhang, Wei,Zhou, Yanyan,Gao, Na,Zhang, Li,&zhangli@scsio.ac.cn.(2015).Feeding ratio and frequency affects cadmium bioaccumulation in black sea bream Acanthopagrus schlegeli.AQUACULTURE ENVIRONMENT INTERACTIONS,7(2),135-145.
MLA Guo, Zhiqiang,et al."Feeding ratio and frequency affects cadmium bioaccumulation in black sea bream Acanthopagrus schlegeli".AQUACULTURE ENVIRONMENT INTERACTIONS 7.2(2015):135-145.
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