POPs in Polar Bears: Organochlorines Affect Bone Density
نویسندگان
چکیده
منابع مشابه
Is Bone Mineral Composition Disrupted by Organochlorines in East Greenland Polar Bears (Ursus maritimus)?
We analyzed bone mineral density (BMD) in skulls of polar bears (Ursus maritimus) (n = 139) from East Greenland sampled during 1892-2002. Our primary goal was to detect possible changes in bone mineral content (osteopenia) due to elevated exposure to organochlorine [polychlorinated biphenyls (PCBs), dichlorodiphenyl trichloroethane (DDT) and its metabolites, chlordanes (CHLs), dieldrin, hexacyc...
متن کاملEffects of climate change on polar bears.
In this article, we review the effects on polar bears of global warming that have already been observed, and try to evaluate what may happen to the polar bears in the future. Many researchers have predicted a wide range of impacts of climate change on polar bear demography and conditions. A predicted major reduction in sea ice habitat will reduce the availability of ice associated seals, the ma...
متن کاملNew support for polar bears and tigers
Agency (FSA), announced that meat and milk from cloned cows was safe to eat, a striking aspect of media activity was the contrast between fulsome reports in the ‘upmarket’ newspapers and minimal coverage in the mass circulation tabloids, some of which ignored the announcement entirely. Presumably this reflected their responses to inherently reassuring news. “Cloned meat declared safe to eat” ra...
متن کاملPolar bears shift from thinning ice
A long-term study by the US Geological Survey (USGS) suggests that recent changes in the quality and availability of sea ice in northern Alaska are the most likely explanation for a decrease in female polar bears bringing up cubs on sea ice and an increase in basing themselves on land. Researchers from the USGS used satellite telemetry to evaluate changes in the distribution of female nesting s...
متن کاملMama Grizzly and the polar bears.
A recent paper on the matrilineal population history of two sister species, Ursus maritimus (polar bears) and Ursus arctos (brown bears), based on mtDNA sequence analysis, reveals a comparatively recent introgression. The authors propose that it represents a signature of environ mental stress in marginal habitats [1]. In a nutshell, it means that all modern polar bears probably belong to a mate...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Environmental Health Perspectives
سال: 2004
ISSN: 0091-6765,1552-9924
DOI: 10.1289/ehp.112-a1011