PCBs and OH-PCBs in polar bear mother–cub pairs: A comparative study based on plasma levels in 1998 and 2008

Bytingsvik, Jenny; Lie, Elisabeth; Aars, Jon; Derocher, Andrew E.; Wiig, Øystein; Jenssen, Bjørn Munro

doi:10.1016/j.scitotenv.2011.12.033

Cited by 76 publications

(84 citation statements)

References 92 publications

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“…This has not, to our knowledge, been shown in wild mammals or birds. As mammalian females transfer POPs to their offspring through placenta and milk (Bernhoft et al 1997;Bytingsvik et al 2012), the regression to age is weaker for females. Similarly, female seabirds transfer POPs to their offspring through egg-yolk (Verreault et al 2006).…”

Section: Introductionmentioning

confidence: 99%

The black-legged kittiwake preen gland—an overlooked organ for depuration of fat-soluble contaminants?

et al. 2016

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Section: Introductionmentioning

confidence: 99%

The black-legged kittiwake preen gland—an overlooked organ for depuration of fat-soluble contaminants?

et al. 2016

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“…However, polar bears are known to accumulate much higher levels of contaminants. In addition, polar bears are able to metabolize PCBs to OH-PCBs and might therefore be more susceptible to endocrine disruption (Bytingsvik et al, 2012;Gustavson et al, 2015). Also, positive correlations between androgens (DHT) and contaminants (PCB-118, BDE-100 and ∑PCBs) were observed among males.…”

Section: Discussionmentioning

confidence: 99%

Steroids in house sparrows (Passer domesticus): Effects of POPs and male quality signalling

Nossen

Ciesielski

Dimmen

et al. 2016

Science of The Total Environment

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At high trophic levels, several environmental contaminants, such as polychlorinated biphenyls (PCBs), organochlorine pesticides (OCPs) and polybrominated flame retardants (PBDEs) have been found to affect endocrinological processes governing growth and reproduction. Less attention has been paid to species at lower trophic levels, and it is presently unclear whether or not the lower levels of contaminants observed at lower trophic levels are able to exert negative effects on important endocrinological process governing growth and reproduction.The aim of the present study was to use the house sparrow (Passer domesticus) as a low trophic level model species to study the effects of environmental contaminants on endocrinology. We analysed the levels of some selected PCBs , PBDEs [TS]) in adult house sparrows from a population on the island Leka, mid Norway. Plasma samples were analysed for steroid hormones by gas chromatography tandem mass spectrometry (GC-MS/MS) and liver samples were analysed for environmental contaminants by gas chromatography-electron capture detection (GC-ECD) and gas chromatography mass spectrometry (GC-MS). It was hypothesized that POPs may have endocrine disrupting effects on the local house sparrow population and can thus interfere with the steroid hormone homeostasis.Bivariate correlations revealed negative relationships between PCB-118 and βE2 and p,p'-DDE, ∑OCPs and E1 among female house sparrows. Among male sparrows, bivariate correlations indicted positive relationships between DHT levels and PCB-118, BDE-100 and ∑PCBs. Furthermore, positive relationships were found between AN and TS levels and beak length, as well as ornamental traits such as badge size category and area of the total badge size in males. Although sparrows are in the mid-range trophic levels, the present study indicates that POPs may affect steroid homeostasis in house sparrows, in particular for females. For males, circulating steroid levels appears to be more associated with biometric parameters related to elaborate traits.

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“…Specific studies (BearHealth) comparing mother-cub pairs during two time periods, 1997-1998 and 2008, show that plasma PCB concentrations were approximately twice as high in the first time period compared to the second (Bytingsvik et al 2012a). In the same dataset, plasma PFOS concentrations decreased during the study period whereas most perfluoroalkyl carboxylates showed an opposite trend (Bytingsvik et al 2012b).…”

Section: Contaminant Levels and Trendsmentioning

confidence: 99%

Polar bears: proceedings of the 18th working meeting of the IUCN/SSC Polar Bear Specialist Group, Anchorage, Alaska, 7-11 June 2016

Durner¹,

Laidre²,

York³

2018

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PCBs and OH-PCBs in polar bear mother–cub pairs: A comparative study based on plasma levels in 1998 and 2008

Cited by 76 publications

References 92 publications

The black-legged kittiwake preen gland—an overlooked organ for depuration of fat-soluble contaminants?

The black-legged kittiwake preen gland—an overlooked organ for depuration of fat-soluble contaminants?

Steroids in house sparrows (Passer domesticus): Effects of POPs and male quality signalling

Polar bears: proceedings of the 18th working meeting of the IUCN/SSC Polar Bear Specialist Group, Anchorage, Alaska, 7-11 June 2016

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