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No island-effect on glucocorticoid levels for a rodent from a near-shore archipelago

Island rodents are often larger and live at higher population densities than their mainland counterparts, characteristics that have been referred to as “island syndrome”. Island syndrome has been well studied, but few studies have tested for island-mainland differences in stress physiology. We evalu...

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Autores principales: Stewart, Nathan D., Mastromonaco, Gabriela F., Burness, Gary
Formato: Online Artículo Texto
Lenguaje:English
Publicado: PeerJ Inc. 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7034373/
https://www.ncbi.nlm.nih.gov/pubmed/32110493
http://dx.doi.org/10.7717/peerj.8590
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author Stewart, Nathan D.
Mastromonaco, Gabriela F.
Burness, Gary
author_facet Stewart, Nathan D.
Mastromonaco, Gabriela F.
Burness, Gary
author_sort Stewart, Nathan D.
collection PubMed
description Island rodents are often larger and live at higher population densities than their mainland counterparts, characteristics that have been referred to as “island syndrome”. Island syndrome has been well studied, but few studies have tested for island-mainland differences in stress physiology. We evaluated island syndrome within the context of stress physiology of white-footed mice (Peromyscus leucopus) captured from 11 islands and five mainland sites in Thousand Islands National Park, Ontario, Canada. Stress physiology was evaluated by quantifying corticosterone (a stress biomarker), the primary glucocorticoid in mice, from hair and its related metabolites from fecal samples. White-footed mice captured in this near-shore archipelago did not display characteristics of island syndrome, nor differences in levels of hair corticosterone or fecal corticosterone metabolites compared with mainland mice. We suggest that island white-footed mice experience similar degrees of stress in the Thousand Islands compared with the mainland. Although we did not find evidence of island syndrome or differences in glucocorticoid levels, we identified relationships between internal (sex, body mass) and external (season) factors and our hormonal indices of stress in white-footed mice.
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spelling pubmed-70343732020-02-27 No island-effect on glucocorticoid levels for a rodent from a near-shore archipelago Stewart, Nathan D. Mastromonaco, Gabriela F. Burness, Gary PeerJ Biogeography Island rodents are often larger and live at higher population densities than their mainland counterparts, characteristics that have been referred to as “island syndrome”. Island syndrome has been well studied, but few studies have tested for island-mainland differences in stress physiology. We evaluated island syndrome within the context of stress physiology of white-footed mice (Peromyscus leucopus) captured from 11 islands and five mainland sites in Thousand Islands National Park, Ontario, Canada. Stress physiology was evaluated by quantifying corticosterone (a stress biomarker), the primary glucocorticoid in mice, from hair and its related metabolites from fecal samples. White-footed mice captured in this near-shore archipelago did not display characteristics of island syndrome, nor differences in levels of hair corticosterone or fecal corticosterone metabolites compared with mainland mice. We suggest that island white-footed mice experience similar degrees of stress in the Thousand Islands compared with the mainland. Although we did not find evidence of island syndrome or differences in glucocorticoid levels, we identified relationships between internal (sex, body mass) and external (season) factors and our hormonal indices of stress in white-footed mice. PeerJ Inc. 2020-02-18 /pmc/articles/PMC7034373/ /pubmed/32110493 http://dx.doi.org/10.7717/peerj.8590 Text en ©2020 Stewart et al. https://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, reproduction and adaptation in any medium and for any purpose provided that it is properly attributed. For attribution, the original author(s), title, publication source (PeerJ) and either DOI or URL of the article must be cited.
spellingShingle Biogeography
Stewart, Nathan D.
Mastromonaco, Gabriela F.
Burness, Gary
No island-effect on glucocorticoid levels for a rodent from a near-shore archipelago
title No island-effect on glucocorticoid levels for a rodent from a near-shore archipelago
title_full No island-effect on glucocorticoid levels for a rodent from a near-shore archipelago
title_fullStr No island-effect on glucocorticoid levels for a rodent from a near-shore archipelago
title_full_unstemmed No island-effect on glucocorticoid levels for a rodent from a near-shore archipelago
title_short No island-effect on glucocorticoid levels for a rodent from a near-shore archipelago
title_sort no island-effect on glucocorticoid levels for a rodent from a near-shore archipelago
topic Biogeography
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7034373/
https://www.ncbi.nlm.nih.gov/pubmed/32110493
http://dx.doi.org/10.7717/peerj.8590
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