The secret life of ground squirrels: accelerometry reveals sex-dependent plasticity in above-ground activity
The sexes differ in how and when they allocate energy towards reproduction, but how this influences phenotypic plasticity in daily activity patterns is unclear. Here, we use collar-mounted light loggers and triaxial accelerometers to examine factors that affect time spent above ground and overall dy...
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ftpubmed:oai:pubmedcentral.nih.gov:5043325 2023-05-15T15:09:37+02:00 The secret life of ground squirrels: accelerometry reveals sex-dependent plasticity in above-ground activity Williams, Cory T. Wilsterman, Kathryn Zhang, Victor Moore, Jeanette Barnes, Brian M. Buck, C. Loren 2016-09-28 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5043325/ http://www.ncbi.nlm.nih.gov/pubmed/27703706 https://doi.org/10.1098/rsos.160404 en eng The Royal Society http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5043325/ http://www.ncbi.nlm.nih.gov/pubmed/27703706 http://dx.doi.org/10.1098/rsos.160404 © 2016 The Authors. http://creativecommons.org/licenses/by/4.0/ Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited. CC-BY Biology (Whole Organism) Text 2016 ftpubmed https://doi.org/10.1098/rsos.160404 2016-10-09T00:13:26Z The sexes differ in how and when they allocate energy towards reproduction, but how this influences phenotypic plasticity in daily activity patterns is unclear. Here, we use collar-mounted light loggers and triaxial accelerometers to examine factors that affect time spent above ground and overall dynamic body acceleration (ODBA), an index of activity-specific energy expenditure, across the active season of free-living, semi-fossorial arctic ground squirrels (Urocitellus parryii). We found high day-to-day variability in time spent above ground and ODBA with most of the variance explained by environmental conditions known to affect thermal exchange. In both years, females spent more time below ground compared with males during parturition and early lactation; however, this difference was fourfold larger in the second year, possibly, because females were in better body condition. Daily ODBA positively correlated with time spent above ground in both sexes, but females were more active per unit time above ground. Consequently, daily ODBA did not differ between the sexes when females were early in lactation, even though females were above ground three to six fewer hours each day. Further, on top of having the additional burden of milk production, ODBA data indicate females also had fragmented rest patterns and were more active during late lactation. Our results indicate that sex differences in reproductive requirements can have a substantial influence on activity patterns, but the size of this effect may be dependent on capital resources accrued during gestation. Text Arctic Urocitellus parryii PubMed Central (PMC) Arctic Royal Society Open Science 3 9 160404 |
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topic |
Biology (Whole Organism) |
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Biology (Whole Organism) Williams, Cory T. Wilsterman, Kathryn Zhang, Victor Moore, Jeanette Barnes, Brian M. Buck, C. Loren The secret life of ground squirrels: accelerometry reveals sex-dependent plasticity in above-ground activity |
topic_facet |
Biology (Whole Organism) |
description |
The sexes differ in how and when they allocate energy towards reproduction, but how this influences phenotypic plasticity in daily activity patterns is unclear. Here, we use collar-mounted light loggers and triaxial accelerometers to examine factors that affect time spent above ground and overall dynamic body acceleration (ODBA), an index of activity-specific energy expenditure, across the active season of free-living, semi-fossorial arctic ground squirrels (Urocitellus parryii). We found high day-to-day variability in time spent above ground and ODBA with most of the variance explained by environmental conditions known to affect thermal exchange. In both years, females spent more time below ground compared with males during parturition and early lactation; however, this difference was fourfold larger in the second year, possibly, because females were in better body condition. Daily ODBA positively correlated with time spent above ground in both sexes, but females were more active per unit time above ground. Consequently, daily ODBA did not differ between the sexes when females were early in lactation, even though females were above ground three to six fewer hours each day. Further, on top of having the additional burden of milk production, ODBA data indicate females also had fragmented rest patterns and were more active during late lactation. Our results indicate that sex differences in reproductive requirements can have a substantial influence on activity patterns, but the size of this effect may be dependent on capital resources accrued during gestation. |
format |
Text |
author |
Williams, Cory T. Wilsterman, Kathryn Zhang, Victor Moore, Jeanette Barnes, Brian M. Buck, C. Loren |
author_facet |
Williams, Cory T. Wilsterman, Kathryn Zhang, Victor Moore, Jeanette Barnes, Brian M. Buck, C. Loren |
author_sort |
Williams, Cory T. |
title |
The secret life of ground squirrels: accelerometry reveals sex-dependent plasticity in above-ground activity |
title_short |
The secret life of ground squirrels: accelerometry reveals sex-dependent plasticity in above-ground activity |
title_full |
The secret life of ground squirrels: accelerometry reveals sex-dependent plasticity in above-ground activity |
title_fullStr |
The secret life of ground squirrels: accelerometry reveals sex-dependent plasticity in above-ground activity |
title_full_unstemmed |
The secret life of ground squirrels: accelerometry reveals sex-dependent plasticity in above-ground activity |
title_sort |
secret life of ground squirrels: accelerometry reveals sex-dependent plasticity in above-ground activity |
publisher |
The Royal Society |
publishDate |
2016 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5043325/ http://www.ncbi.nlm.nih.gov/pubmed/27703706 https://doi.org/10.1098/rsos.160404 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Urocitellus parryii |
genre_facet |
Arctic Urocitellus parryii |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5043325/ http://www.ncbi.nlm.nih.gov/pubmed/27703706 http://dx.doi.org/10.1098/rsos.160404 |
op_rights |
© 2016 The Authors. http://creativecommons.org/licenses/by/4.0/ Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/, which permits unrestricted use, provided the original author and source are credited. |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1098/rsos.160404 |
container_title |
Royal Society Open Science |
container_volume |
3 |
container_issue |
9 |
container_start_page |
160404 |
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