Measuring environmental stress in East Greenland polar bears, 1892-1927 and 1988-2009: What does hair cortisol tell us?

被引：66
作者：
Bechshoft, T. O. [1 ]
Riget, F. F. [1 ]
Sonne, C. [1 ]
Letcher, R. J. [2 ]
Muir, D. C. G. [3 ]
Novak, M. A. [4 ]
Henchey, E. [5 ]
Meyer, J. S. [4 ]
Eulaers, I. [6 ]
Jaspers, V. L. B. [6 ]
Eens, M. [6 ]
Covaci, A. [7 ]
Dietz, R. [1 ]
机构：
[1] Aarhus Univ, Dept Biosci, DK-4000 Roskilde, Denmark
[2] Carleton Univ, Natl Wildlife Res Ctr, Environm Canada, Wildlife & Landscape Sci Directorate, Ottawa, ON K1A 0H3, Canada
[3] Environm Canada Prior Subst Exposure, Burlington, ON L7R 4A6, Canada
[4] Univ Massachusetts, Dept Psychol, Amherst, MA 01003 USA
[5] Univ Massachusetts, Dept Biochem, Amherst, MA 01003 USA
[6] Univ Antwerp, Dept Biol, B-2610 Antwerp, Belgium
[7] Univ Antwerp, Toxicol Ctr, B-2610 Antwerp, Belgium
来源：
ENVIRONMENT INTERNATIONAL | 2012年 / 45卷
关键词：
Polar bear; Hair; Cortisol; EDCs; POPs; HPA; PERSISTENT ORGANIC POLLUTANTS; BROMINATED FLAME RETARDANTS; CONTAMINANT TIME-SERIES; URSUS-MARITIMUS; POLYCHLORINATED-BIPHENYLS; MARINE MAMMALS; LONG-TERM; PERFLUOROALKYL CONTAMINANTS; ORGANOHALOGEN CONTAMINANTS; ORGANOCHLORINES AFFECT;
D O I：
10.1016/j.envint.2012.04.005
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Hair sampled from 96 East Greenland polar bears (Ursus maritimus) over the periods 1892-1927 and 1988-2009 was analyzed for cortisol as a proxy to investigate temporal patterns of environmental stress. Cortisol concentration was independent of sex and age, and was found at significantly higher ) (p<0.001) concentrations in historical hair samples (1892-1927; n = 8) relative to recent ones (1988-2009; n = 88). In addition, there was a linear time trend in cortisol concentration of the recent samples (p<0.01), with an annual decrease of 2.7%. The recent hair samples were also analyzed for major bioaccumulative, persistent organic pollutants (POPs). There were no obvious POP related time trends or correlations between hair cortisol and hair POP concentrations. Thus, polar bear hair appears to be a relatively poor indicator of the animal's general POP load in adipose tissue. However, further investigations are warranted to explore the reasons for the temporal decrease found in the bears' hair cortisol levels. (c) 2012 Elsevier Ltd. All rights reserved.
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页码：15 / 21
页数：7
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