Persistent organochlorine compounds in the blubber of ringed seals (Phoca hispida) from the Belcher Islands, Northwest Territories, Canada
Persistent organochlorine compounds in the blubber of ringed seals (Phoca hispida) from the Belcher Islands, Northwest Territories, Canada
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DOI：
10.1016/0141-1136(96)00005-0
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发表时间：
1997-02
影响因子：
3.3
通讯作者：
M. Cameron;T. Metcalfe;C. Metcalfe;C. Macdonald
中科院分区：
文献类型：
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作者：
M. Cameron;T. Metcalfe;C. Metcalfe;C. Macdonald
1991年，研究人员从位于贝尔彻群岛附近哈德逊湾东南部的一群环斑海豹（Phoca hispida）身上获得了鲸脂样本和形态测量数据。在这些动物的脂肪中检测到几种多氯联苯同系物、滴滴涕及其代谢物、技术氯丹成分、六氯环己烷化合物、狄氏剂和灭螨的浓度低于150纳克/克脂质。该地区雌海豹的多氯联苯同系物、DDT化合物和氯丹化合物的浓度低于雄海豹，但六氯环己烷化合物、狄氏剂和灭螨的浓度没有性别特异性差异。观察到雄性海豹的年龄与其估计的总多氯联苯和总滴滴涕的“鲸脂负荷”（毫克）之间的相关性。有证据表明，与1989年从加拿大西北北极的霍尔曼岛种群中取样的雄性海豹相比，贝尔切群岛的雄性海豹的总多氯联苯浓度和鲸脂负荷更高，总高氯联苯浓度更低。形态计量学数据表明，在采样时，霍尔曼岛海豹的状况优于贝尔彻岛海豹。由于环斑海豹体内污染物浓度与动物健康状况呈负相关关系，海豹脂肪负荷分析可能是监测北极环斑海豹污染时空变化趋势的较好方法。
Samples of blubber and morphometric data were obtained in 1991 from a population of ringed seals (Phoca hispida) located in southeastern Hudson Bay, near the Belcher Islands. Several PCB congeners, DDT and its metabolites, components of technical chlordane, HCH compounds, dieldrin and mirex were detected at concentrations below 150 ng/g lipid in the blubber of these animals. Female seals had lower concentrations of PCB congeners, DDT compounds and chlordane compounds in the blubber than male seals from this region, but there were no sex-specific differences observed for HCH compounds, dieldrin and mirex. Correlations were observed between the age of male seals and their estimated ‘blubber burdens’ (mg) of total PCBs and total DDT. There was evidence that the male seals from the Belcher Islands had higher concentrations and blubber burdens of total PCBs and lower concentrations of total HCHs than male seals sampled in 1989 from a population at Holman Island in the northwest Canadian arctic. Morphometric data indicated that the Holman Island seals were in better condition than the Belcher Islands seals at the time of sampling. Due to the negative correlation observed between contaminant concentrations in ringed seals and the condition of the animals, analysis of blubber burdens in seals may be a preferable method for monitoring spatial and temporal trends in the contamination of ringed seals in the arctic.