Kryshev A I, Riabov I N
Radiats Biol Radioecol. 2005 May-Jun;45(3):338-45.
A dynamic model was developed for evaluation of the fish contamination by 137Cs. The dynamics of the accumulation of the radionuclide and the elimination is calculated taking into account the ecological and physiological characteristics of the fish, such as growth and metabolic rates, its position in the food chains of the aquatic ecosystem. The biological elimination of 137Cs from the freshwater fish is proportional to the metabolic rate of the fish. The dimensionless coefficient of the proportionality is equal to epsilonA = 0.3 +/- 0.1. The model was applied for the reconstruction of the long-term dynamics of 137Cs in the food chain "goldfish-pike" from Lake Kozhanovskoe (Bryansk Region, Russia). In 1990-1999 the specific activity of 137Cs in goldfish (generation of 1990) varied in range about 5-20 kBq/kg, whereas the specific activity of 137Cs in pike (generation of 1989) varied in range about 20-40 kBq/kg. The comparison with the data of the observations confirmed that the presented method allows to evaluate adequately the levels and the dynamics of 137Cs accumulation by the freshwater fish.
开发了一个动态模型，用于评估鱼类受137Cs污染的情况。在考虑鱼类的生态和生理特征（如生长和代谢率及其在水生生态系统食物链中的位置）的情况下，计算放射性核素的积累和消除动态。淡水鱼体内137Cs的生物消除与鱼的代谢率成正比。比例的无量纲系数等于εA = 0.3±0.1。该模型用于重建科扎诺夫斯科耶湖（俄罗斯布良斯克州）“金鱼-梭子鱼”食物链中137Cs的长期动态。1990 - 1999年，金鱼（1990年一代）体内137Cs的比活度在约5 - 20 kBq/kg范围内变化，而梭子鱼（1989年一代）体内137Cs的比活度在约20 - 40 kBq/kg范围内变化。与观测数据的比较证实，所提出的方法能够充分评估淡水鱼体内137Cs的积累水平和动态。
