Resumé
| Originalsprog | Engelsk |
|---|---|
| Tidsskrift | Environmental Pollution |
| Vol/bind | 146 |
| Udgave nummer | 1 |
| Sider (fra-til) | 166-73 |
| Antal sider | 7 |
| ISSN | 0269-7491 |
| DOI | |
| Status | Udgivet - 1. mar. 2007 |
| Udgivet eksternt | Ja |
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Age and seasonal variability of polybrominated diphenyl ethers in free-ranging East Greenland polar bears (Ursus maritimus). / Dietz, Rune; Rigét, Frank F; Sonne, Christian; Letcher, Robert J; Backus, Sean; Born, Erik W; Kirkegaard, Maja; Muir, Derek C G.
I: Environmental Pollution, Bind 146, Nr. 1, 01.03.2007, s. 166-73.Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › peer review
TY - JOUR
T1 - Age and seasonal variability of polybrominated diphenyl ethers in free-ranging East Greenland polar bears (Ursus maritimus).
AU - Dietz, Rune
AU - Rigét, Frank F
AU - Sonne, Christian
AU - Letcher, Robert J
AU - Backus, Sean
AU - Born, Erik W
AU - Kirkegaard, Maja
AU - Muir, Derek C G
PY - 2007/3/1
Y1 - 2007/3/1
N2 - Polybrominated diphenyl ethers (PBDEs) were analysed in adipose tissue from 92 East Greenland polar bears (Ursus maritimus) sampled during 1999-2001. Mean SigmaPBDE concentrations were 70 ng/g lipid weight (lw) (range: 22-192 ng/g lw) and showed no relationship with age or sex. Of the 32 analysed PBDE congeners; BDE47, BDE153, BDE99 and BDE100 dominated, and comprised 99.6% of the SigmaPBDE concentration. The SigmaPBDE concentration had a highly significant correlation with SigmaPCB, SigmaCHL, dieldrin, HCB and SigmaHCH concentrations. We found a seasonal pattern of median SigmaPBDE concentration with 1.2 to 1.8 times higher concentrations in March to July than the rest of the year. The seasonal variation also provides a clue to the seasonal exposure, bio-availability, toxic exposure and degradation. We suggest that future geographical PBDE data comparisons may not need corrections for sex or age, but such data sets should be corrected for seasonal variability, using the presented correctional trigonometric regression.
AB - Polybrominated diphenyl ethers (PBDEs) were analysed in adipose tissue from 92 East Greenland polar bears (Ursus maritimus) sampled during 1999-2001. Mean SigmaPBDE concentrations were 70 ng/g lipid weight (lw) (range: 22-192 ng/g lw) and showed no relationship with age or sex. Of the 32 analysed PBDE congeners; BDE47, BDE153, BDE99 and BDE100 dominated, and comprised 99.6% of the SigmaPBDE concentration. The SigmaPBDE concentration had a highly significant correlation with SigmaPCB, SigmaCHL, dieldrin, HCB and SigmaHCH concentrations. We found a seasonal pattern of median SigmaPBDE concentration with 1.2 to 1.8 times higher concentrations in March to July than the rest of the year. The seasonal variation also provides a clue to the seasonal exposure, bio-availability, toxic exposure and degradation. We suggest that future geographical PBDE data comparisons may not need corrections for sex or age, but such data sets should be corrected for seasonal variability, using the presented correctional trigonometric regression.
U2 - 10.1016/j.envpol.2006.05.040
DO - 10.1016/j.envpol.2006.05.040
M3 - Journal article
VL - 146
SP - 166
EP - 173
JO - Environmental Pollution
JF - Environmental Pollution
SN - 0269-7491
IS - 1
ER -