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首页> 外文期刊>Chemosphere >Profile of persistent chlorinated contaminants, including selected chiral compounds, in wolverine (Gulo gulo) livers from the Canadian Arctic
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Profile of persistent chlorinated contaminants, including selected chiral compounds, in wolverine (Gulo gulo) livers from the Canadian Arctic

机译：来自加拿大北极地区的金银花（Gulo gulo）肝脏中的持久性氯化污染物（包括选定的手性化合物）的概况

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Wolverines (Gulo gulo) are circumpolar omnivores that live throughout the alpine and arctic tundra ecosystem. Wolverine livers were collected at Kugluktuk (Coppermine), NU (n = 12) in the western Canadian Arctic to report, for the first time, the residue patterns of persistent organochlorine contaminants (OCs) in this species. The enantiomer fractions (EFs) of several chiral OCs, including PCB atropisomers, in wolverines were also determined. Results were compared to OC concentrations and EFs of chiral contaminants in arctic fox (Alopex lagopus) from Ulukhaqtuuq (Holman), NT (n = 20); a closely related species that scavenges the marine and terrestrial arctic environment. The rank order of hepatic concentrations for sum (Σ) OC groups in wolverines were polychlorinated biphenyls (ΣPCB) > chlordane-related components (ΣCHLOR) > DDT-related compounds (ΣDDT) > hexachlorocyclohexane isomers (ΣHCHs). The most abundant OC analytes detected in wolverine liver were PCB-153, PCB-180, and oxy-chlordane (OXY). Wolverine age and gender did not influence OC concentrations, which were comparable to lipid-normalized values in arctic fox. The EFs of several chiral OCs (α-HCH, cis- and trans-chlordane, OXY, heptachlor exo-epoxide) and PCB atropisomers (PCB-136, 149) were nonracemic in arctic fox and wolverine liver and similar to those previously calculated in arctic fox and polar bears from Iceland and the Canadian Arctic. Results suggest that these species have similar ability to biotransform OCs. As well, contaminant profiles suggest that terrestrial mammals do not represent the major source of OC exposure to wolverines and that wolverines are scavenging more contaminated prey items, such as marine mammals. While ΣPCB did not exceed the concentrations associated with mammalian reproductive impairment, future research is required to properly evaluate the potential affect of other OCs on the overall health of wolverines.
机译：金刚狼（Gulo gulo）是生活在整个高山和北极苔原生态系统中的绕极杂食动物。在加拿大西部北极地区的古格鲁克图克（Coppermine），NU（n = 12）收集了金刚狼的肝脏，首次报告了该物种中持久性有机氯污染物（OCs）的残留模式。还测定了金刚狼中几种手性OC（包括PCB阻转异构体）的对映体分数（EF）。将结果与新罕布什尔州乌鲁卡克图克（Holman）的北极狐（Alopex lagopus）中手性污染物的OC浓度和EFs进行比较（n = 20）；清除海洋和陆地北极环境的密切相关物种。金刚狼中总（Σ）OC基团的肝浓度排序为多氯联苯（ΣPCB）>氯丹相关组分（ΣCHLOR）> DDT相关化合物（ΣDDT）>六氯环己烷异构体（ΣHCHs）。在金刚狼肝中检测到的最丰富的OC分析物是PCB-153，PCB-180和氧氯丹（OXY）。金刚狼的年龄和性别都不会影响OC的浓度，这与北极狐中的脂质标准化值相当。几种手性OC（α-HCH，顺式和反式氯丹，OXY，七氯外环氧化物）和PCB阻转异构体（PCB-136，149）的EF在北极狐和金刚狼肝脏中是非消旋的，与先前在来自冰岛和加拿大北极地区的北极狐和北极熊。结果表明，这些物种具有类似的生物转化OC的能力。同样，污染物的分布图表明，陆生哺乳动物并不是金银花中OC暴露的主要来源，并且金银花正在清除更多受污染的猎物，例如海洋哺乳动物。尽管ΣPCB的浓度没有超过与哺乳动物生殖功能障碍相关的浓度，但仍需要进一步的研究来正确评估其他OC对金刚狼整体健康的潜在影响。

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