title: Trace Element Contamination in Tissues of Four Bird Species from the Rift Valley Region, Ethiopia.
abstract: Concentrations of ten trace elements (Hg, As, Cd, Pb, Co, Cr, Cu, Ni, Se and Zn) were determined in different tissues (liver, kidney, muscle, heart and brain) of African sacred ibis (Threskiornis aethiopicus), Hamerkop (Scopus umbretta), marabou stork (Leptoptilos crumeniferus) and great white pelican (Pelecanus onocrotalus) inhabiting the Ethiopian Rift Valley region. There were differences in trace element patterns among the bird species. Significantly (p < 0.05) higher concentrations of Cd (5.53 µg/g dw ± 2.94) in kidney and Hg (0.75 µg/g ww ± 0.30) in liver were observed in the great white pelican compared to the other species, and liver concentrations of these two elements showed positive correlations with trophic level. Concentrations of toxic elements (As, Cd, Pb and Hg) in liver were below their respective toxicological thresholds, indicating that the data may provide baseline information for future studies.
authors.affiliation: Laboratory of Toxicology, Department of Environmental Veterinary Sciences, Graduate School of Veterinary Medicine, Hokkaido University, Kita 18, Nishi 9, Kita-ku, Sapporo, 060-0818, Japan.|Department of Chemistry, College of Natural and Computational Sciences, University of Gondar, P.O. Box 196, Gondar, Ethiopia.
authors.forename: Yared Beyene
authors.initials: YB
authors.lastname: Yohannes
authors.affiliation: Laboratory of Toxicology, Department of Environmental Veterinary Sciences, Graduate School of Veterinary Medicine, Hokkaido University, Kita 18, Nishi 9, Kita-ku, Sapporo, 060-0818, Japan.|Water Research Group, Unit for Environmental Sciences and Management, North-West University, Potchefstroom, 2520, South Africa.
authors.forename: Yoshinori
authors.initials: Y
authors.lastname: Ikenaka
authors.affiliation: Laboratory of Toxicology, Department of Environmental Veterinary Sciences, Graduate School of Veterinary Medicine, Hokkaido University, Kita 18, Nishi 9, Kita-ku, Sapporo, 060-0818, Japan.
authors.forename: Shouta M M
authors.initials: SM
authors.lastname: Nakayama
authors.affiliation: Department of Environmental Veterinary Sciences, Graduate School of Veterinary Medicine, Hokkaido University, Kita 18, Nishi 9, Kita-ku, Sapporo, 060-0818, Japan.
authors.forename: Hazuki
authors.initials: H
authors.lastname: Mizukawa
authors.affiliation: Laboratory of Toxicology, Department of Environmental Veterinary Sciences, Graduate School of Veterinary Medicine, Hokkaido University, Kita 18, Nishi 9, Kita-ku, Sapporo, 060-0818, Japan. ishizum@vetmed.hokudai.ac.jp.
authors.forename: Mayumi
authors.initials: M
authors.lastname: Ishizuka
mesh_terms: D000818:Animals; D001717:Birds / Q000378:metabolism*; D004784:Environmental Monitoring; D004785:Environmental Pollutants / Q000032:analysis / Q000378:metabolism*; D005002:Ethiopia; D007668:Kidney / Q000378:metabolism; D008099:Liver / Q000378:metabolism; D009132:Muscles / Q000378:metabolism; D014131:Trace Elements / Q000032:analysis / Q000378:metabolism*
chemical_list: D004785:Environmental Pollutants; D014131:Trace Elements
keywords: Bird; Ecological risk assessment; Ethiopian rift valley; Tissue; Trace element