Fant M L, Nyman M, Helle E, Rudbäck E
Department of Ecology and Systematics, Zoological Laboratory, University of Helsinki, PO Box 17 FIN-00014, Helsinki, Finland.
Environ Pollut. 2001;111(3):493-501. doi: 10.1016/s0269-7491(00)00078-6.
The concentrations of mercury (Hg), cadmium (Cd), lead (Pb) and selenium (Se) were determined in liver, kidney and muscle samples from 20 Baltic ringed seals (Phoca hispida botnica) (3-32 years), and from 17 ringed seals (Phoca hispida) (0-20 years) from Svalbard, in the Arctic. The concentrations of Hg and Se were considerably higher in the Baltic ringed seals, but the Cd concentrations lower than in the Svalbard ringed seals. There was no big geographical difference with respect to Pb concentrations. Se and Hg concentrations showed a significant positive correlation in both regions. By comparison with earlier studies on Baltic seals, the metal concentrations have remained at the same level since the 1980s. Of the metals we studied, only the level of Hg in Baltic ringed seals can be considered high (mean 53 mg/kg, range 6.5-124 mg/kg wet wt. for liver), but probably not high enough to cause metal intoxication. No pathological changes associated with metal intoxication were observed in the seals.
测定了来自波罗的海的20只环斑海豹（Phoca hispida botnica，3至32岁）以及来自北极斯瓦尔巴群岛的17只环斑海豹（Phoca hispida，0至20岁）的肝脏、肾脏和肌肉样本中汞（Hg）、镉（Cd）、铅（Pb）和硒（Se）的浓度。波罗的海环斑海豹体内汞和硒的浓度显著更高，但镉浓度低于斯瓦尔巴群岛的环斑海豹。铅浓度在地理上没有太大差异。两个地区的硒和汞浓度均呈现显著正相关。与早期对波罗的海海豹的研究相比，自20世纪80年代以来金属浓度一直保持在同一水平。在我们研究的金属中，只有波罗的海环斑海豹体内的汞含量可被认为较高（肝脏湿重平均为53毫克/千克，范围为6.5至124毫克/千克），但可能还不足以导致金属中毒。在海豹身上未观察到与金属中毒相关的病理变化。
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