Department of Advanced Zoology and Biotechnology, Sadakathullah Appa College (Autonomous), Rahmath Nagar, Tirunelveli, 627 011, Tamil Nadu, India.
Environ Monit Assess. 2012 May;184(5):2993-3011. doi: 10.1007/s10661-011-2166-8. Epub 2011 Jul 9.
The globally distributed fallout radionuclide (137)Cs was monitored in 25 resident and 22 migratory fish species collected from some regions of west and east coast of southern India to establish a baseline data. The samples were collected during June 2008 to June 2009. Higher level of (137)Cs was noted in planktivorous fishes and lower level in herbivores. A significant variation in (137)Cs was observed between fishes with different feeding habits and different migratory pattern. Oceanodromic migratory fishes displayed higher cesium levels than other migratory types. Similarly, migratory fishes displayed higher (137)Cs concentration compared to resident fishes. The overall range of (137)Cs varied from 0.06 to 0.3 Bq/kg in fishes. The biological concentration varied from 55 to 250. The average external dose rate to fishes was calculated to be 2.7 × 10(-7) μGy/h, while the internal dose rate varied from 8.50 × 10(-6) to 5.27 × 10(-5) μGy/h. The hazard quotient for fishes was found to be less than 1. The average intake of (137)Cs via fishes to the public was calculated to be 3.5 Bq/year and subsequently the committed effective dose was 0.05 μSv/year. The data obtained were less than global average and comparable to those of many regions.
在印度南部西海岸和东海岸的一些地区，采集了 25 种定居鱼类和 22 种洄游鱼类，监测了全球分布的放射性核素（137）Cs，以建立基线数据。样本采集于 2008 年 6 月至 2009 年 6 月。浮游生物食性鱼类中（137）Cs 水平较高，草食性鱼类中（137）Cs 水平较低。不同摄食习性和洄游模式的鱼类之间（137）Cs 水平存在显著差异。洄游性鱼类的（137）Cs 水平高于其他洄游类型。同样，洄游鱼类的（137）Cs 浓度高于定居鱼类。鱼类中（137）Cs 的总体范围为 0.06 至 0.3 Bq/kg。生物浓缩系数为 55 至 250。计算得出鱼类的平均外照射剂量率为 2.7×10(-7) μGy/h，内照射剂量率为 8.50×10(-6) 至 5.27×10(-5) μGy/h。鱼类的危险商数小于 1。通过鱼类摄入（137）Cs 对公众的平均摄入量为 3.5 Bq/年，随后的有效剂量为 0.05 μSv/年。所得数据低于全球平均值，与许多地区相当。
