Organochlorine pesticides and heavy metals in fish from Lake Awassa, Ethiopia : Insights from stable isotope analysis

• Yohannes, Yared Beyene

• Ikenaka, Yoshinori

• Nakayama, Shouta M. M.

• Saengtienchai, Aksorn

• Watanabe, Kensuke

• Ishizuka, Mayumi

抄録

The levels and bioaccumulation of organochlorine pesticides (OCPs) and heavy metals were studied in muscle and liver of three fish species, with two trophic levels, from Lake Awassa, Ethiopia. DDTs were the predominant organic pollutant in all species with a maximum level of 73.28 ng g(-1) wet weight (ww). p,p'-DDE was the predominate congener and showed a significant (p <0.001) relationship with delta N-15, which indicates that DDTs could biomagnified in the food web of the lake. Generally, high levels of heavy metals (Cd, Co, Cr, Cu, Ni, Pb, Zn and Hg) were found in liver samples as compared to muscles. The levels of Cd, Co, Cu, Ni, and Pb in liver samples showed negative correlation with delta N-15. They were found markedly higher in the lower trophic level fish species (p < 0.05) that indicates biodilution whereas; Zn level showed positive correlation with delta N-15. (C) 2013 Elsevier Ltd. All rights reserved.

収録刊行物

• Chemosphere

  Chemosphere 91 (6), 857-863, 2013-05

  Elsevier

キーワード

• Bioaccumulation
• OCPs
• Heavy metal
• Fish
• Lake Awassa

詳細情報

• CRID: 1050282677653159680
• NII論文ID: 120005295656
• HANDLE: 2115/52915
• ISSN: 00456535
• 本文言語コード: en
• 資料種別: journal article
• データソース種別:
  • IRDB
  • CiNii Articles