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...
Published in: | American Journal of Human Biology |
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2012
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Online Access: | https://portal.findresearcher.sdu.dk/da/publications/e402e3ed-b057-480e-8c67-f75818e6915c https://doi.org/10.1002/ajhb.22214 |
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ftsydanskunivpub:oai:sdu.dk:publications/e402e3ed-b057-480e-8c67-f75818e6915c 2024-05-19T07:33:09+00:00 Sex ratios in the Arctic--do man-made chemicals matter? Bjerregaard, Peter Chatwood, Susan Denning, Bryany Joseph, Lawrence Young, T Kue 2012-03 https://portal.findresearcher.sdu.dk/da/publications/e402e3ed-b057-480e-8c67-f75818e6915c https://doi.org/10.1002/ajhb.22214 eng eng https://portal.findresearcher.sdu.dk/da/publications/e402e3ed-b057-480e-8c67-f75818e6915c info:eu-repo/semantics/restrictedAccess Bjerregaard , P , Chatwood , S , Denning , B , Joseph , L & Young , T K 2012 , ' Sex ratios in the Arctic--do man-made chemicals matter? ' , American Journal of Human Biology , vol. 24 , no. 2 , pp. 165-169 . https://doi.org/10.1002/ajhb.22214 Arctic Regions Endocrine System Environmental Monitoring Female Hazardous Substances Humans Linear Models Male Sex Ratio article 2012 ftsydanskunivpub https://doi.org/10.1002/ajhb.22214 2024-05-01T00:16:00Z 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. Article in Journal/Newspaper Arctic Arctic Greenland inuit Alaska University of Southern Denmark Research Portal American Journal of Human Biology 24 2 165 169 |
institution |
Open Polar |
collection |
University of Southern Denmark Research Portal |
op_collection_id |
ftsydanskunivpub |
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. |
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://portal.findresearcher.sdu.dk/da/publications/e402e3ed-b057-480e-8c67-f75818e6915c https://doi.org/10.1002/ajhb.22214 |
genre |
Arctic Arctic Greenland inuit Alaska |
genre_facet |
Arctic Arctic Greenland inuit Alaska |
op_source |
Bjerregaard , P , Chatwood , S , Denning , B , Joseph , L & Young , T K 2012 , ' Sex ratios in the Arctic--do man-made chemicals matter? ' , American Journal of Human Biology , vol. 24 , no. 2 , pp. 165-169 . https://doi.org/10.1002/ajhb.22214 |
op_relation |
https://portal.findresearcher.sdu.dk/da/publications/e402e3ed-b057-480e-8c67-f75818e6915c |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1002/ajhb.22214 |
container_title |
American Journal of Human Biology |
container_volume |
24 |
container_issue |
2 |
container_start_page |
165 |
op_container_end_page |
169 |
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1799471274456514560 |