Transfer of super(137Cs into fish in small forest lakes)

• Published in: Journal of environmental radioactivity Vol. 101; no. 8; pp. 647 - 653
• Main Authors: Saxen, Ritva, Heinaevaara, Sirpa, Rask, Martti, Ruuhijaervi, Jukka, Rand, Heidi
• Format: Journal Article
• Language: English
• Published: 01-08-2010
• Subjects: Drainage
• ISSN: 0265-931X
• DOI: 10.1016/j.jenvrad.2010.04.004

The transfer of super(137Cs into fish in seepage and drainage lakes from 1988 to 1992 was analysed using linear regression. Empirical results for ) super(1)37Cs in lake water and fish were used to calculate concentration factors (CFs). In the drainage lakes the CF decreased during the study period by 9% per year whereas in the seepage lakes the CF increased significantly by 4.3% per year. The transfer of super(137Cs into pike was significantly (1.6 times) higher than that into perch. The CF increased on average by 3.4% for each 1-cm increase in the median size of perch. The relationship between the water chemistry and the CF differed between clear-water seepage and brown-water drainage lakes.)