Department of Biology, Norwegian University of Science and Technology, Trondheim, Norway.
Chemosphere. 2010 Mar;78(11):1378-84. doi: 10.1016/j.chemosphere.2009.12.070. Epub 2010 Feb 1.
Mercury (Hg) concentrations were analyzed in the livers of Baikal seals and in plankton, zoobenthos and fish which constitute food items for the seals. Concentrations of Hg in the liver of Baikal seals were up to two orders of magnitude lower than those in seals inhabiting other lakes. The low levels of Hg are due to the low levels of the Hg in the fish from the family Comephoride, which reflect the very low concentrations of Hg in Baikal water. The development stage (pups and adults) and the sex of the seals have significant influence on their hepatic Hg concentrations. The differences between Hg accumulation in adult males, adult females and pups could be attributed to the reproductive cycle of the Baikal seals. In spite of low concentrations, Hg is characterized by high values of the concentration factor (CF) for the livers of for Baikal seals. Biomagnification factors (BMFs) suggest biomagnifications of Hg in the fish-seal trophic link.
对贝加尔海豹的肝脏以及构成其食物来源的浮游生物、底栖动物和鱼类中的汞 (Hg) 浓度进行了分析。贝加尔海豹肝脏中的 Hg 浓度比栖息在其他湖泊中的海豹低两个数量级。Hg 浓度较低是由于来自 Comphoride 科的鱼类中 Hg 含量较低，而鱼类中的 Hg 含量反映了贝加尔湖水中的 Hg 含量非常低。海豹的发育阶段（幼崽和成年）和性别对其肝脏中的 Hg 浓度有显著影响。成年雄性、成年雌性和幼崽之间 Hg 积累的差异可归因于贝加尔海豹的繁殖周期。尽管浓度较低，但 Hg 的浓度因子 (CF) 对于贝加尔海豹的肝脏来说非常高。生物放大因子 (BMF) 表明在鱼类-海豹食物链中 Hg 发生了生物放大。
