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Geographic Information System-Based Source Estimation of Copper Pollution in Lake Itezhi-tezhi and Metal-Accumulation Profiles in Oreochromis spp. from Both Field and Laboratory Studies

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Title: Geographic Information System-Based Source Estimation of Copper Pollution in Lake Itezhi-tezhi and Metal-Accumulation Profiles in Oreochromis spp. from Both Field and Laboratory Studies
Authors: Nakayama, Shouta M. M. Browse this author →KAKEN DB
Ikenaka, Yoshinori Browse this author →KAKEN DB
Muzandu, Kaampwe Browse this author
Choongo, Kennedy Browse this author
Yabe, John Browse this author
Muroya, Taro Browse this author
Ijiri, Shigeho Browse this author →KAKEN DB
Minagawa, Masao Browse this author →KAKEN DB
Umemura, Takashi Browse this author →KAKEN DB
Ishizuka, Mayumi Browse this author →KAKEN DB
Keywords: Lake Itezhi-tezhi
Oreochromis spp
metal accumulation profiles
stable isotope ratio
Issue Date: Jan-2013
Publisher: Springer-Verlag
Journal Title: Archives of Environmental Contamination and Toxicology
Volume: 64
Issue: 1
Start Page: 119
End Page: 129
Publisher DOI: 10.1007/s00244-012-9802-3
PMID: 23052357
Abstract: The Copperbelt region, upstream of the Kafue River, including Lake Itezhi-tezhi (ITT), in Zambia has extensive copper (Cu) mines. In our field study, geographic information system (GIS) analysis in lake sediment indicated that the northern part of the lake, Copperbelt region, could be the Cu pollution source. Concentrations of Cu in stomach contents between fish species were not significantly different. However, Oreochromis spp. liver showed significantly higher Cu concentrations than those in other fish species. Log liver [Cu], standard length, and nitrogen stable isotope ratio were positively correlated only in Oreochromis spp. In the laboratory study, O. niloticus and Oryzias latipes were exposed to Cu for four days and recovery phases up to 28 days were examined. O. niloticus showed significantly higher concentrations of Cu compared with O. latipes at all sampling points. Significantly higher concentrations of Hg in Schilbe intermedius liver than for other fish species were observed, while Oreochromis macrochir showed significantly higher concentration of Cd. In conclusion, the northern part of the lake could be the source of Cu pollution in Lake ITT. Diet may not be the reason for high Cu accumulation in Oreochromis spp. Results from both field and laboratory studies imply that Oreochromis spp. contain high concentrations of Cu under normal physiological conditions.
Rights: The final publication is available at www.springerlink.com
Type: article (author version)
URI: http://hdl.handle.net/2115/51779
Appears in Collections:獣医学院・獣医学研究院 (Graduate School of Veterinary Medicine / Faculty of Veterinary Medicine) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 石塚 真由美

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