title: Organochlorine pesticides in bird species and their prey (fish) from the Ethiopian Rift Valley region, Ethiopia.
abstract: Organochlorine pesticides (OCPs) and stable isotopes were measured in muscle from 4 bird and 5 fish species from the Ethiopian Rift Valley region where DDT is used for malaria control and vast agricultural activities are carried out. We investigated the bioaccumulation of OCPs such as DDTs, HCHs, chlordanes, and heptachlors between the species, and examined the potential risk posed by these compounds for bird species. Significant differences in contaminant profiles and levels were observed within the species. Levels of total OCPs ranged from 3.7 to 148.7 μg/g lipid in bird and 0.04 to 10.9 μg/g lipid in fish species. DDTs were the predominant contaminant, and a positive relationship between δ(15)N and ΣDDT concentrations was found. The main DDT metabolite, p,p'-DDE was the most abundant and significantly greater concentrations in bird species (up to 138.5 μg/g lipid), which could have deleterious effects on survival and/or reproduction of birds.
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; University of Gondar, Faculty of Natural and Computational Science, Department of Chemistry, 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.
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: 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. Electronic address: ishizum@vetmed.hokudai.ac.jp.
authors.forename: Mayumi
authors.initials: M
authors.lastname: Ishizuka
mesh_terms: D000383:Agriculture; D000818:Animals; D001717:Birds / Q000378:metabolism*; D003633:Dichlorodiphenyl Dichloroethylene / Q000378:metabolism; D004784:Environmental Monitoring; D005002:Ethiopia; D005399:Fishes / Q000378:metabolism*; D020387:Food Chain; D006843:Hydrocarbons, Chlorinated / Q000032:analysis / Q000378:metabolism*; D010575:Pesticides / Q000032:analysis / Q000378:metabolism*; D045483:Rivers; D014874:Water Pollutants, Chemical / Q000032:analysis / Q000378:metabolism*
chemical_list: D006843:Hydrocarbons, Chlorinated; D010575:Pesticides; D014874:Water Pollutants, Chemical; D003633:Dichlorodiphenyl Dichloroethylene
keywords: Bioaccumulation; Bird; DDTs; Ethiopian Rift Valley; OCPs