Lam James C W, Tanabe Shinsuke, Chan Simon K F, Lam Michael H W, Martin Michael, Lam Paul K S
Center for Coastal Pollution and Conservation, Department of Biology and Chemistry, City University of Hong Kong, Kowloon, Hong Kong SAR, PR China.
Environ Pollut. 2006 Dec;144(3):790-801. doi: 10.1016/j.envpol.2006.02.016. Epub 2006 Apr 17.
Concentrations of 22 trace elements were determined in green turtle (Chelonia mydas) eggs collected from Hong Kong. Concentrations of selenium, lead and nickel in these eggs were generally higher than those reported in other studies. The predicted no effect concentrations (PNEC; ng/g wet weight) of Pb (1000), Se (340 and 6000 for the worst-case and best-case scenarios, respectively) and Ni (17) in the green turtle eggs were estimated. Hazard quotients (HQs) estimate that Se (HQs: 0.2-24.5) and Ni (HQs: 4.0-26.4) may pose some risks to the turtles. Our study also found that concentrations of Ag, Se, Zn, Hg and Pb in the shell of the turtle eggs were significantly correlated with levels in the whole egg contents (yolk+albumen). Once the precise relationships of specific elements are established, egg-shell concentrations may be used as a non-lethal, non-invasive, surrogate for predicting whole egg burden of certain contaminants in marine turtles.
对从香港采集的绿海龟(蠵龟)卵中的22种微量元素浓度进行了测定。这些卵中硒、铅和镍的浓度普遍高于其他研究报告的浓度。估算了绿海龟卵中铅(1000)、硒(最坏情况和最佳情况分别为340和6000)和镍(17)的预测无效应浓度(PNEC,纳克/克湿重)。危害商数(HQs)估计,硒(HQs:0.2 - 24.5)和镍(HQs:4.0 - 26.4)可能会对海龟构成一定风险。我们的研究还发现,龟卵壳中银、硒、锌、汞和铅的浓度与整个卵内容物(蛋黄 + 蛋清)中的含量显著相关。一旦确定了特定元素的精确关系,卵壳浓度可用作预测海龟某些污染物全卵负荷的非致命、非侵入性替代指标。