气候变化领域集成服务门户(CCPortal): Body measurements and blood plasma lipid, PCB and OH-PCB content of polar bear (U. maritimus) mothers and cubs, Svalbard

CCPortal

DOI	https://doi.org/10.1594/PANGAEA.808112
	Body measurements and blood plasma lipid, PCB and OH-PCB content of polar bear (U. maritimus) mothers and cubs, Svalbard
	Bytingsvik; Jenny; Lie; Elisabeth; Aars; Jon; Derocher; Andrew E; Wiig; Øystein; Jenssen; Bjørn Munro
发布日期	2012-02-27
数据集类型	dataset
英文简介	The aim of this study was to examine the plasma concentrations and prevalence of polychlorinated biphenyls (PCBs) and hydroxylated PCB-metabolites (OH-PCBs) in polar bear (Ursus maritimus) mothers (n = 26) and their 4 months old cubs-of-the-year (n = 38) from Svalbard to gain insight into the mother-cub transfer, biotransformation and to evaluate the health risk associated with the exposure to these contaminants. As samplings were performed in 1997/1998 and 2008, we further investigated the differences in levels and pattern of PCBs between the two sampling years. The plasma concentrations of Sum(21)PCBs (1997/1998: 5710 ± 3090 ng/g lipid weight [lw], 2008: 2560±1500 ng/g lw) and Sum(6)OH-PCBs (1997/1998: 228 ± 60 ng/g wet weight [ww], 2008: 80 ± 38 ng/g ww) in mothers were significantly lower in 2008 compared to in 1997/1998. In cubs, the plasma concentrations of Sum(21)PCBs (1997/1998: 14680 ± 5350 ng/g lw, 2008: 6070 ± 2590 ng/g lw) and Sum(6)OH-PCBs (1997/1998: 98 ± 23 ng/g ww, 2008: 49 ± 21 ng/g ww) were also significantly lower in 2008 than in 1997/1998. Sum(21)PCBs in cubs was 2.7 ± 0.7 times higher than in their mothers. This is due to a significant maternal transfer of these contaminants. In contrast, Sum(6)OH-PCBs in cubs were approximately 0.53 ± 0.16 times the concentration in their mothers. This indicates a lower maternal transfer of OH-PCBs compared to PCBs. The majority of the metabolite/precursor-ratios were lower in cubs compared to mothers. This may indicate that cubs have a lower endogenous capacity to biotransform PCBs to OH-PCBs than polar bear mothers. Exposure to PCBs and OH-PCBs is a potential health risk for polar bears, and the levels of PCBs and OH-PCBs in cubs from 2008 were still above levels associated with health effects in humans and wildlife.
空间范围	Median Latitude: 77.700000 * Median Longitude: 20.950000 * South-bound Latitude: 77.400000 * West-bound Longitude: 18.000000 * North-bound Latitude: 78.000000 * East-bound Longitude: 23.900000
时间范围	1998-04-14T00:00:00 - 2008-04-21T00:00:00
语种	英语
国家	国际
学科大类	气候变化
学科子类	气候变化
文献类型	数据集
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/215541
推荐引用方式 GB/T 7714	Bytingsvik,Jenny,Lie,et al. Body measurements and blood plasma lipid, PCB and OH-PCB content of polar bear (U. maritimus) mothers and cubs, Svalbard.2012-02-27.https://doi.org/10.1594/PANGAEA.808112.