Bioaccumulation of ¹³⁷Cs in the Main Species of Fishes in Lakes of Central Italy

Calibration of NaI(TI) spectrometer for radiocesium volume-samples. Some results from Transylvania region

“…The results show an important deposit in the NE-SW direction which is 2-8 times larger than the average value for Romania [14]. This direction was also pointed out by other measurement [11][12][13].…”

“…4 we can conclude that an important Cs deposit (especially on NE-SW direction) exists in Romania, due to the fact that this direction coincided with the radioactive cloud direction (1-4 May 1996) and a large amount of rainfall was recorded at that time. Also in the same direction, in other countries, (North-Western Bulgaria, Serbia, North of Greece, Albania, Italy), an important radioactive fallout was measured [11][12][13].…”

Cesium accumulation by fish following acute input to lakes: a comparison of experimental and Chernobyl-impacted systems

“…This lack is especially noteworthy given that 137 Cs concentrations in fish 1) may not reach their maximum concentrations until months after the initial input (Grimas, 1989;Hakanson et al, 1992;Monte et al, 1993;Sundbom et al, 2003;Saxen and Sundell, 2006), and 2) may retain these high concentrations for some months thereafter (Jonsson et al, 1999;Smith et al, 2000Smith et al, , 2002Sundbom et al, 2003;Franic and Marovic, 2007). These delayed maxima and continuing high concentrations reflect 1) the time required for Cs to pass through lake food chains leading to fish, 2) continued elevated Cs concentrations in the water column due to either continuing Cs inputs from the watershed (Smith et al, 1997;Hakanson, 2004) or the recycling of Cs from lake sediments (Alberts et al, 1979;Evans et al, 1983), and 3) the often low rate of elimination of Cs by fish (Ugedal et al, 1992;Rowan and Rasmussen, 1995).…”