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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2012
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Online Access: | https://era.library.ualberta.ca/items/5313202f-0757-46c6-aad8-d49f2eeb5546 https://doi.org/10.7939/r3-4w0c-4n40 |
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ftunivalberta:oai:era.library.ualberta.ca:5313202f-0757-46c6-aad8-d49f2eeb5546 2024-06-23T07:49:16+00:00 Sex ratios in the arctic—do man‐made chemicals matter? Bjerregaard, Peter Chatwood, Susan Denning, Bryany Joseph, Lawrence Young, T. Kue 2012-01-27T00:00:00+00:00 https://era.library.ualberta.ca/items/5313202f-0757-46c6-aad8-d49f2eeb5546 https://doi.org/10.7939/r3-4w0c-4n40 English eng https://era.library.ualberta.ca/items/5313202f-0757-46c6-aad8-d49f2eeb5546 doi:10.7939/r3-4w0c-4n40 http://creativecommons.org/licenses/by-nc/4.0/ Arctic Regions Endocrine System Environmental Monitoring Female Hazardous Substances Humans Linear Models Male Sex Ratio Article (Published) 2012 ftunivalberta https://doi.org/10.7939/r3-4w0c-4n40 2024-06-03T03:09:00Z 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) Article in Journal/Newspaper Arctic Greenland inuit Alaska University of Alberta: Era - Education and Research Archive Arctic Greenland |
institution |
Open Polar |
collection |
University of Alberta: Era - Education and Research Archive |
op_collection_id |
ftunivalberta |
language |
English |
topic |
Arctic Regions Endocrine System Environmental Monitoring Female Hazardous Substances Humans Linear Models Male Sex Ratio |
spellingShingle |
Arctic Regions Endocrine System Environmental Monitoring Female Hazardous Substances Humans Linear Models Male Sex Ratio Bjerregaard, Peter Chatwood, Susan Denning, Bryany Joseph, Lawrence Young, T. Kue Sex ratios in the arctic—do man‐made chemicals matter? |
topic_facet |
Arctic Regions Endocrine System Environmental Monitoring Female Hazardous Substances Humans Linear Models Male Sex Ratio |
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 |
Article in Journal/Newspaper |
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://era.library.ualberta.ca/items/5313202f-0757-46c6-aad8-d49f2eeb5546 https://doi.org/10.7939/r3-4w0c-4n40 |
geographic |
Arctic Greenland |
geographic_facet |
Arctic Greenland |
genre |
Arctic Greenland inuit Alaska |
genre_facet |
Arctic Greenland inuit Alaska |
op_relation |
https://era.library.ualberta.ca/items/5313202f-0757-46c6-aad8-d49f2eeb5546 doi:10.7939/r3-4w0c-4n40 |
op_rights |
http://creativecommons.org/licenses/by-nc/4.0/ |
op_doi |
https://doi.org/10.7939/r3-4w0c-4n40 |
_version_ |
1802639583744098304 |