Sources of diel variation in energetic physiology in an Arctic-breeding, diving seaduck
Diel variation in baseline glucocorticoid (GC) secretion influences energetics and foraging behaviors. In temperate breeding, diurnal vertebrates, studies have shown that daily patterns of baseline GC secretion are influenced by environmental photoperiod, with baseline GCs peaking prior to sunrise t...
Published in: | General and Comparative Endocrinology |
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ftunivwindsor:oai:scholar.uwindsor.ca:biologypub-1871 2023-06-11T04:08:43+02:00 Sources of diel variation in energetic physiology in an Arctic-breeding, diving seaduck Steenweg, Rolanda J. Hennin, Holly L. Bêty, Joël Gilchrist, H. Grant Williams, Tony D. Crossin, Glenn T. Love, Oliver P. 2015-01-01T08:00:00Z application/pdf https://scholar.uwindsor.ca/biologypub/871 https://doi.org/10.1016/j.ygcen.2015.04.012 https://scholar.uwindsor.ca/context/biologypub/article/1871/viewcontent/Steenweg_et_al.___2015___Sources_of_diel_variation_in_energetic_physiology_.pdf unknown Scholarship at UWindsor https://scholar.uwindsor.ca/biologypub/871 doi:10.1016/j.ygcen.2015.04.012 https://scholar.uwindsor.ca/context/biologypub/article/1871/viewcontent/Steenweg_et_al.___2015___Sources_of_diel_variation_in_energetic_physiology_.pdf Biological Sciences Publications Biology Life Sciences text 2015 ftunivwindsor https://doi.org/10.1016/j.ygcen.2015.04.012 2023-05-06T18:53:01Z Diel variation in baseline glucocorticoid (GC) secretion influences energetics and foraging behaviors. In temperate breeding, diurnal vertebrates, studies have shown that daily patterns of baseline GC secretion are influenced by environmental photoperiod, with baseline GCs peaking prior to sunrise to stimulate waking and foraging behaviors. Measures of physiological energy acquisition are also expected to peak in response to foraging activity, but their relationship to GC levels have not been well studied. In contrast to temperate breeding species, virtually nothing is known about diel GC and energetic metabolite secretion in Arctic breeding species, which experience almost constant photoperiods in spring and summer. Using a ten-year dataset, we examined the daily, 24-h pattern of baseline corticosterone (CORT) and triglyceride (TRIG) secretion in approximately 800 female pre-breeding Arctic-nesting common eiders (Somateria mollissima). We related these traits to environmental photoperiod and to tidal cycle. In contrast to temperate breeding species, we found that that neither time of day nor tidal trend predicted diel variation in CORT or TRIG secretion in Arctic-breeding eiders. Given the narrow window of opportunity for breeding in polar regions, we suggest that eiders must decouple their daily foraging activity from light and tidal cycles if they are to accrue sufficient energy for successful breeding. As CORT is known to influence foraging behavior, the absence of a distinct diel pattern of CORT secretion may therefore be an adaptation to optimize reproductive investment and likelihood for success in some polar-breeding species. Text Arctic Somateria mollissima University of Windsor, Ontario: Scholarship at UWindsor Arctic General and Comparative Endocrinology 216 39 45 |
institution |
Open Polar |
collection |
University of Windsor, Ontario: Scholarship at UWindsor |
op_collection_id |
ftunivwindsor |
language |
unknown |
topic |
Biology Life Sciences |
spellingShingle |
Biology Life Sciences Steenweg, Rolanda J. Hennin, Holly L. Bêty, Joël Gilchrist, H. Grant Williams, Tony D. Crossin, Glenn T. Love, Oliver P. Sources of diel variation in energetic physiology in an Arctic-breeding, diving seaduck |
topic_facet |
Biology Life Sciences |
description |
Diel variation in baseline glucocorticoid (GC) secretion influences energetics and foraging behaviors. In temperate breeding, diurnal vertebrates, studies have shown that daily patterns of baseline GC secretion are influenced by environmental photoperiod, with baseline GCs peaking prior to sunrise to stimulate waking and foraging behaviors. Measures of physiological energy acquisition are also expected to peak in response to foraging activity, but their relationship to GC levels have not been well studied. In contrast to temperate breeding species, virtually nothing is known about diel GC and energetic metabolite secretion in Arctic breeding species, which experience almost constant photoperiods in spring and summer. Using a ten-year dataset, we examined the daily, 24-h pattern of baseline corticosterone (CORT) and triglyceride (TRIG) secretion in approximately 800 female pre-breeding Arctic-nesting common eiders (Somateria mollissima). We related these traits to environmental photoperiod and to tidal cycle. In contrast to temperate breeding species, we found that that neither time of day nor tidal trend predicted diel variation in CORT or TRIG secretion in Arctic-breeding eiders. Given the narrow window of opportunity for breeding in polar regions, we suggest that eiders must decouple their daily foraging activity from light and tidal cycles if they are to accrue sufficient energy for successful breeding. As CORT is known to influence foraging behavior, the absence of a distinct diel pattern of CORT secretion may therefore be an adaptation to optimize reproductive investment and likelihood for success in some polar-breeding species. |
format |
Text |
author |
Steenweg, Rolanda J. Hennin, Holly L. Bêty, Joël Gilchrist, H. Grant Williams, Tony D. Crossin, Glenn T. Love, Oliver P. |
author_facet |
Steenweg, Rolanda J. Hennin, Holly L. Bêty, Joël Gilchrist, H. Grant Williams, Tony D. Crossin, Glenn T. Love, Oliver P. |
author_sort |
Steenweg, Rolanda J. |
title |
Sources of diel variation in energetic physiology in an Arctic-breeding, diving seaduck |
title_short |
Sources of diel variation in energetic physiology in an Arctic-breeding, diving seaduck |
title_full |
Sources of diel variation in energetic physiology in an Arctic-breeding, diving seaduck |
title_fullStr |
Sources of diel variation in energetic physiology in an Arctic-breeding, diving seaduck |
title_full_unstemmed |
Sources of diel variation in energetic physiology in an Arctic-breeding, diving seaduck |
title_sort |
sources of diel variation in energetic physiology in an arctic-breeding, diving seaduck |
publisher |
Scholarship at UWindsor |
publishDate |
2015 |
url |
https://scholar.uwindsor.ca/biologypub/871 https://doi.org/10.1016/j.ygcen.2015.04.012 https://scholar.uwindsor.ca/context/biologypub/article/1871/viewcontent/Steenweg_et_al.___2015___Sources_of_diel_variation_in_energetic_physiology_.pdf |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Somateria mollissima |
genre_facet |
Arctic Somateria mollissima |
op_source |
Biological Sciences Publications |
op_relation |
https://scholar.uwindsor.ca/biologypub/871 doi:10.1016/j.ygcen.2015.04.012 https://scholar.uwindsor.ca/context/biologypub/article/1871/viewcontent/Steenweg_et_al.___2015___Sources_of_diel_variation_in_energetic_physiology_.pdf |
op_doi |
https://doi.org/10.1016/j.ygcen.2015.04.012 |
container_title |
General and Comparative Endocrinology |
container_volume |
216 |
container_start_page |
39 |
op_container_end_page |
45 |
_version_ |
1768382181322784768 |