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

Nakayama, Shouta M. M.; Ikenaka, Yoshinori; Muzandu, Kaampwe; Choongo, Kennedy; Yabe, John; Muroya, Taro; Ijiri, Shigeho; Minagawa, Masao; Umemura, Takashi; Ishizuka, Mayumi

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

Nakayama, Shouta M. M.; Ikenaka, Yoshinori; Muzandu, Kaampwe et al.

Archives of Environmental Contamination and Toxicology, 2013, 64(1), 119-129

Permalink : https://hdl.handle.net/2115/51779

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アクセス権	open access
URI	https://hdl.handle.net/2115/51779
タイトル	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
著者	Nakayama, Shouta M. M. ; Ikenaka, Yoshinori ; Muzandu, Kaampwe ; Choongo, Kennedy ; Yabe, John ; Muroya, Taro ; Ijiri, Shigeho ; Minagawa, Masao ; Umemura, Takashi ; Ishizuka, Mayumi
e-Rad_Researcher 90647629 著者名 Nakayama, Shouta M. M.
e-Rad_Researcher 40543509 著者名 Ikenaka, Yoshinori
著者名 Muzandu, Kaampwe
著者名 Choongo, Kennedy
著者名 Yabe, John
著者名 Muroya, Taro
e-Rad_Researcher 90425421 著者名 Ijiri, Shigeho
e-Rad_Researcher 10250507 著者名 Minagawa, Masao
e-Rad_Researcher 00151936 著者名 Umemura, Takashi
e-Rad_Researcher 50332474 著者名 Ishizuka, Mayumi
言語	英語
キーワード	Lake Itezhi-tezhi
	Oreochromis spp
	metal accumulation profiles
	stable isotope ratio
発行日	2013-01
出版者	Springer-Verlag
収録物名	Archives of Environmental Contamination and Toxicology
巻(号)	64(1)
ページ	119-129
抄録	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.
資源タイプ	学術雑誌論文
出版タイプ	Accepted Manuscript
権利情報	The final publication is available at www.springerlink.com
PISSN	0090-4341
関連情報	PMID 23052357
関連情報 (isVersionOf)	出版社版DOI https://doi.org/10.1007/s00244-012-9802-3