Sex ratios in the arctic—do man‐made chemicals matter?
Objectives: The objective was to analyze the variation of secondary sex ratios across the Arctic and to estimate the time trend. The rationale for this was claims in news media that, in the Arctic, sex ratios have become reduced due to exposure to anthropogenic contaminants in the environment. Metho...
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fttriple:oai:gotriple.eu:10670/1.zqldea 2023-05-15T14:41:57+02:00 Sex ratios in the arctic—do man‐made chemicals matter? Bjerregaard, Peter Chatwood, Susan Denning, Bryany Joseph, Lawrence Young, T. Kue 2012-01-27 https://doi.org/10.7939/r3-4w0c-4n40 https://era.library.ualberta.ca/items/5313202f-0757-46c6-aad8-d49f2eeb5546 en eng doi:10.7939/r3-4w0c-4n40 10670/1.zqldea https://era.library.ualberta.ca/items/5313202f-0757-46c6-aad8-d49f2eeb5546 lic_creative-commons ERA : Education and Research Archive envir geo Other https://vocabularies.coar-repositories.org/resource_types/c_1843/ 2012 fttriple https://doi.org/10.7939/r3-4w0c-4n40 2023-01-22T17:55:37Z Objectives: The objective was to analyze the variation of secondary sex ratios across the Arctic and to estimate the time trend. The rationale for this was claims in news media that, in the Arctic, sex ratios have become reduced due to exposure to anthropogenic contaminants in the environment. Methods: Data was collected from 27 circumpolar jurisdictions from public websites of the eight Arctic countries. Sex ratios at birth were calculated for each jurisdiction and each available year. Linear regression models of the sex ratios across time were fit within each jurisdiction to estimate the change in sex ratio over time. Results: All male:female sex ratios were close to 1.05 with time trends close to 0. In a Bayesian hierarchical model overall sex ratio was estimated at 1.054 (95% confidence interval 1.048, 1.058). The estimate for the 10‐year slope across all jurisdictions was 0.0010 (95% confidence interval −0.0021, 0.0046). Separate analyses of indigenous populations in Alaska and Greenland gave similar results and similar sex ratios were found among Greenland Inuit in 1900 and today. Conclusions: The absence of deviation of the secondary sex ratio in any of the Arctic jurisdictions indicates that the contaminants that are present are not disrupting endocrine systems to the extent that sex ratios are being affected." (as cited in abstract) Other/Unknown Material Arctic Greenland inuit Alaska Unknown Arctic Greenland |
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English |
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envir geo Bjerregaard, Peter Chatwood, Susan Denning, Bryany Joseph, Lawrence Young, T. Kue Sex ratios in the arctic—do man‐made chemicals matter? |
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envir geo |
description |
Objectives: The objective was to analyze the variation of secondary sex ratios across the Arctic and to estimate the time trend. The rationale for this was claims in news media that, in the Arctic, sex ratios have become reduced due to exposure to anthropogenic contaminants in the environment. Methods: Data was collected from 27 circumpolar jurisdictions from public websites of the eight Arctic countries. Sex ratios at birth were calculated for each jurisdiction and each available year. Linear regression models of the sex ratios across time were fit within each jurisdiction to estimate the change in sex ratio over time. Results: All male:female sex ratios were close to 1.05 with time trends close to 0. In a Bayesian hierarchical model overall sex ratio was estimated at 1.054 (95% confidence interval 1.048, 1.058). The estimate for the 10‐year slope across all jurisdictions was 0.0010 (95% confidence interval −0.0021, 0.0046). Separate analyses of indigenous populations in Alaska and Greenland gave similar results and similar sex ratios were found among Greenland Inuit in 1900 and today. Conclusions: The absence of deviation of the secondary sex ratio in any of the Arctic jurisdictions indicates that the contaminants that are present are not disrupting endocrine systems to the extent that sex ratios are being affected." (as cited in abstract) |
format |
Other/Unknown Material |
author |
Bjerregaard, Peter Chatwood, Susan Denning, Bryany Joseph, Lawrence Young, T. Kue |
author_facet |
Bjerregaard, Peter Chatwood, Susan Denning, Bryany Joseph, Lawrence Young, T. Kue |
author_sort |
Bjerregaard, Peter |
title |
Sex ratios in the arctic—do man‐made chemicals matter? |
title_short |
Sex ratios in the arctic—do man‐made chemicals matter? |
title_full |
Sex ratios in the arctic—do man‐made chemicals matter? |
title_fullStr |
Sex ratios in the arctic—do man‐made chemicals matter? |
title_full_unstemmed |
Sex ratios in the arctic—do man‐made chemicals matter? |
title_sort |
sex ratios in the arctic—do man‐made chemicals matter? |
publishDate |
2012 |
url |
https://doi.org/10.7939/r3-4w0c-4n40 https://era.library.ualberta.ca/items/5313202f-0757-46c6-aad8-d49f2eeb5546 |
geographic |
Arctic Greenland |
geographic_facet |
Arctic Greenland |
genre |
Arctic Greenland inuit Alaska |
genre_facet |
Arctic Greenland inuit Alaska |
op_source |
ERA : Education and Research Archive |
op_relation |
doi:10.7939/r3-4w0c-4n40 10670/1.zqldea https://era.library.ualberta.ca/items/5313202f-0757-46c6-aad8-d49f2eeb5546 |
op_rights |
lic_creative-commons |
op_doi |
https://doi.org/10.7939/r3-4w0c-4n40 |
_version_ |
1766313642539614208 |