IUCN / SSC Cat Specialist Group - Digital Cat Library |
|
||||||||||
|
||||||||||
|
|
| Gjelsvik, R.; Holm, E.; Kalas, J.A.; Persson, B.; Asbrink, J. | |
| Polonium-210 and Caesium-137 in lynx (_Lynx lynx_), wolverine (_Gulo gulo_) and wolves (_Canis lupus_) | |
| 2014 Journal of Environmental Radioactivity (138): 402-409 | |
Wolves, lynx and wolverines are on the top of the food-chain in northern Scandinavia and Finland. 210Po and 137Cs have been analysed in samples of liver, kidney and muscle from 28 wolves from Sweden. In addition blood samples were taken from 27 wolves. In 9 of the wolves, samples of muscle, liver and blood were analysed for 210Po. Samples of liver and muscle were collected from 16 lynx and 16 wolverines from Norway. The liver samples were analysed for 210Po and 137Cs. Only 137Cs analyses were carried out for the muscle samples. The wolves were collected during the winter 2010 and 2011, while the samples for lynx and wolverines were all from 2011. The activity concentrations of 210Po in wolves were higher for liver (range 20e523 Bq kg1 d.w.) and kidney (range 24e942 Bq kg1 d.w.) than muscle (range 1e43 Bq kg1 d.w.) and blood (range 2e54 Bq kg1 d.w.). Activity ratios, 210Po/210Pb, in wolf samples of muscle, liver and blood were in the ranges 2e77, 9e56 and 2e54. Using a wet weight ratio of 3.8 the maximal absorbed dose from 210Po to wolf liver was estimated to 3500 mGy per year. Compared to wolf, the ranges of 210Po in liver samples were lower in lynx (range 22e211 Bq kg1 d.w.) and wolverine (range16 e160 Bq kg1 d.w.). Concentration of 137Cs in wolf samples of muscle, liver, kidney and blood were in the ranges 70e8410 Bq kg1 d.w., 36e4050 Bq kg1 d.w., 31e3453 Bq kg1 d.w. and 4e959 Bq kg1 d.w., respectively. 137Cs in lynx muscle and liver samples were in the ranges 44e13393 Bq kg1 d.w. and 125 e10260 Bq kg1 d.w. The corresponding values for 137Cs in wolverine were 22e3405 Bq kg1 d.w. for liver and 53e4780 Bq kg1 d.w. for muscle. The maximal absorbed dose from 137Cs to lynx was estimated to 3000 mGy per year. |
|
 |
PDF files are only accessible to Friends of the Cat Group. Joining Friends of the Cat Group gives you unlimited access and downloads in the Cat SG Library for one year, and allows you to receive our newsletter Cat News (2 regular issues per year plus special issues). More information how to join here |
(c) IUCN/SSC Cat Specialist Group ( IUCN - The World Conservation Union) |