Martin Pamela A, McDaniel Tana V, Hughes Kimberley D, Hunter Bruce
Environment and Climate Change Canada, 867 Lakeshore Road, Burlington, Ontario, L7S 1A1, Canada.
Broadwing Biological Consulting, 1944 Parkside Drive, Pickering, Ontario, L1V 3N5, Canada.
Environ Monit Assess. 2017 Aug 19;189(9):459. doi: 10.1007/s10661-017-6154-5.
Organochlorine contaminants were measured in livers of wild mink (Neovison vison) trapped in the lower Great Lakes basin from 1998 to 2006. To assess exposure and potential risk in mink feeding on Great Lakes biota, concentrations of contaminants were compared in mink trapped within 7.8 km of the shoreline as well as at inland sites (i.e., 8-40 km). Overall, significant spatial variation in mean hepatic concentrations of sum PCBs and seven other organochlorines was found in mink from 13 Great Lakes sites, many of which are within the Great Lakes Areas of Concern. Mean sum PCB concentrations, on a lipid weight basis, ranged from 2 μg/g in mink from inland Lake Ontario sites to 44 μg/g in mink from western Lake Erie. Concentrations of other organochlorines in mink were generally low. Mink from western Lake Erie had the highest mean cumulative organochlorine burdens dominated largely by PCBs. A significant age effect was found with 1-year-old mink having significantly higher PCB burdens than mink less than 1 year in age. With respect to published PCB threshold effect concentrations, some mink exceeded those associated with effects on reproduction and survival as well as the presence of jaw lesions. This was most consistently found in western Lake Erie where the health of populations of wild mink may be adversely affected and where no mink 2 years of age or older were collected.
1998年至2006年期间，对在大湖盆地下游捕获的野生水貂（Neovison vison）肝脏中的有机氯污染物进行了测量。为了评估以五大湖生物群为食的水貂的暴露情况和潜在风险，比较了在海岸线7.8公里范围内捕获的水貂以及内陆地区（即8 - 40公里）捕获的水貂体内污染物的浓度。总体而言，在来自13个大湖地区的水貂中，多氯联苯总和其他七种有机氯的平均肝脏浓度存在显著的空间差异，其中许多地区属于五大湖关注区域。以脂质重量为基础，多氯联苯的平均总浓度范围为：安大略湖内陆地区水貂为2μg/g，伊利湖西部水貂为44μg/g。水貂体内其他有机氯的浓度普遍较低。伊利湖西部的水貂平均累积有机氯负担最高，主要由多氯联苯主导。发现了显著的年龄效应，1岁水貂的多氯联苯负担明显高于年龄小于1岁的水貂。关于已公布的多氯联苯阈值效应浓度，一些水貂超过了与繁殖、生存以及颌部病变相关的浓度。在伊利湖西部最常发现这种情况，那里野生水貂种群的健康可能受到不利影响，而且没有收集到2岁及以上的水貂。
