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Journal of Wildlife Diseases, 41(3), 2005, pp. 664-668
© Wildlife Disease Association  2005
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SHORT COMMUNICATION

Thallium Contamination in Wild Ducks in Japan

Mariko Mochizuki1,2, Makoto Mori3, Mayumi Akinaga1, Kyoko Yugami1, Chika Oya4, Ryo Hondo1 and Fukiko Ueda1,5

1 Department of Veterinary Public Health, Nippon Veterinary and Animal Science University, Tokyo, Japan;
2 Current address: Department of Veterinary Nursing, Nippon Veterinary and Animal Science University, Tokyo, Japan;
3 Department of Applied Biological Chemistry, Faculty of Agriculture, Shizuoka University, Shizuoka, Japan;
4 Department of Biomedical Science, Graduate School of Agricultural and Life Sciences, University of Tokyo, Tokyo, Japan
5 Corresponding author (email: fueda{at}nvau.ac.jp)

ABSTRACT:   Although thallium (Tl) is toxic to both humans and animals, there is little information on contamination in wildlife. In this study, Tl contents in wild ducks in Japan were determined. Contents of Tl in kidney and liver ranged from 0.42 to 119.61 and 0.10 to 33.94 µg/g dry weight, respectively. Significant correlations between Tl contents in kidney and liver were observed for all dabbling ducks except mallard (Anas platyrhynchos); similar correlations were not observed in diving ducks. Variation in Tl content was observed between sampling locations with the highest mean Tl content in the Eurasian wigeon (Anas penelope) collected in Ibaraki Prefecture.
  Key words:  Duck, thallium, wild bird.






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