Energetic physiology mediates individual optimization of breeding phenology in a migratory Arctic Seabird
The influence of variation in individual state on key reproductive decisions impacting fitness is well appreciated in evolutionary ecology. Rowe et al. (1994) developed a condition-dependent individual optimization model predicting that three key factors impact the ability of migratory female birds...
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ftunivwindsor:oai:scholar.uwindsor.ca:ibiopub-1067 2023-06-11T04:09:11+02:00 Energetic physiology mediates individual optimization of breeding phenology in a migratory Arctic Seabird Hennin, Holly L. Bêty, Jöel Legagneux, Pierre Gilchrist, H. Grant Williams, Tony D. Love, Oliver P. 2016-10-01T07:00:00Z application/pdf https://scholar.uwindsor.ca/ibiopub/68 https://doi.org/10.1086/688044 https://scholar.uwindsor.ca/context/ibiopub/article/1067/viewcontent/Energetic_physiology_mediates_individual_optimization_of_breeding.pdf unknown Scholarship at UWindsor https://scholar.uwindsor.ca/ibiopub/68 doi:10.1086/688044 https://scholar.uwindsor.ca/context/ibiopub/article/1067/viewcontent/Energetic_physiology_mediates_individual_optimization_of_breeding.pdf Integrative Biology Publications Breeding phenology Energetic management Fattening rate Glucocorticoids Individual optimization Triglycerides Integrative Biology text 2016 ftunivwindsor https://doi.org/10.1086/688044 2023-05-06T19:11:20Z The influence of variation in individual state on key reproductive decisions impacting fitness is well appreciated in evolutionary ecology. Rowe et al. (1994) developed a condition-dependent individual optimization model predicting that three key factors impact the ability of migratory female birds to individually optimize breeding phenology tomaximize fitness in seasonal environments: arrival condition, arrival date, and ability to gain in condition on the breeding grounds. While empirical studies have confirmed that greater arrival body mass and earlier arrival dates result in earlier laying, no study has assessed whether individual variation in energetic management of condition gain effects this key fitness-related decision. Using an 8-year data set from over 350 prebreeding female Arctic common eiders (Somateria mollissima), we tested this component of the model by examining whether individual variation in two physiological traits influencing energetic management (plasma triglycerides: physiological fattening rate; baseline corticosterone: energetic demand) predicted individual variation in breeding phenology after controlling for arrival date and body mass. As predicted by the optimization model, individuals with higher fattening rates and lower energetic demand had the earliest breeding phenology (shortest delays between arrival and laying; earliest laying dates). Our results are the first to empirically determine that individual flexibility in prebreeding energetic management influences key fitness-related reproductive decisions, suggesting that individuals have the capacity to optimally manage reproductive investment. Text Arctic Somateria mollissima University of Windsor, Ontario: Scholarship at UWindsor Arctic Rowe ENVELOPE(-60.904,-60.904,-62.592,-62.592) The American Naturalist 188 4 434 445 |
institution |
Open Polar |
collection |
University of Windsor, Ontario: Scholarship at UWindsor |
op_collection_id |
ftunivwindsor |
language |
unknown |
topic |
Breeding phenology Energetic management Fattening rate Glucocorticoids Individual optimization Triglycerides Integrative Biology |
spellingShingle |
Breeding phenology Energetic management Fattening rate Glucocorticoids Individual optimization Triglycerides Integrative Biology Hennin, Holly L. Bêty, Jöel Legagneux, Pierre Gilchrist, H. Grant Williams, Tony D. Love, Oliver P. Energetic physiology mediates individual optimization of breeding phenology in a migratory Arctic Seabird |
topic_facet |
Breeding phenology Energetic management Fattening rate Glucocorticoids Individual optimization Triglycerides Integrative Biology |
description |
The influence of variation in individual state on key reproductive decisions impacting fitness is well appreciated in evolutionary ecology. Rowe et al. (1994) developed a condition-dependent individual optimization model predicting that three key factors impact the ability of migratory female birds to individually optimize breeding phenology tomaximize fitness in seasonal environments: arrival condition, arrival date, and ability to gain in condition on the breeding grounds. While empirical studies have confirmed that greater arrival body mass and earlier arrival dates result in earlier laying, no study has assessed whether individual variation in energetic management of condition gain effects this key fitness-related decision. Using an 8-year data set from over 350 prebreeding female Arctic common eiders (Somateria mollissima), we tested this component of the model by examining whether individual variation in two physiological traits influencing energetic management (plasma triglycerides: physiological fattening rate; baseline corticosterone: energetic demand) predicted individual variation in breeding phenology after controlling for arrival date and body mass. As predicted by the optimization model, individuals with higher fattening rates and lower energetic demand had the earliest breeding phenology (shortest delays between arrival and laying; earliest laying dates). Our results are the first to empirically determine that individual flexibility in prebreeding energetic management influences key fitness-related reproductive decisions, suggesting that individuals have the capacity to optimally manage reproductive investment. |
format |
Text |
author |
Hennin, Holly L. Bêty, Jöel Legagneux, Pierre Gilchrist, H. Grant Williams, Tony D. Love, Oliver P. |
author_facet |
Hennin, Holly L. Bêty, Jöel Legagneux, Pierre Gilchrist, H. Grant Williams, Tony D. Love, Oliver P. |
author_sort |
Hennin, Holly L. |
title |
Energetic physiology mediates individual optimization of breeding phenology in a migratory Arctic Seabird |
title_short |
Energetic physiology mediates individual optimization of breeding phenology in a migratory Arctic Seabird |
title_full |
Energetic physiology mediates individual optimization of breeding phenology in a migratory Arctic Seabird |
title_fullStr |
Energetic physiology mediates individual optimization of breeding phenology in a migratory Arctic Seabird |
title_full_unstemmed |
Energetic physiology mediates individual optimization of breeding phenology in a migratory Arctic Seabird |
title_sort |
energetic physiology mediates individual optimization of breeding phenology in a migratory arctic seabird |
publisher |
Scholarship at UWindsor |
publishDate |
2016 |
url |
https://scholar.uwindsor.ca/ibiopub/68 https://doi.org/10.1086/688044 https://scholar.uwindsor.ca/context/ibiopub/article/1067/viewcontent/Energetic_physiology_mediates_individual_optimization_of_breeding.pdf |
long_lat |
ENVELOPE(-60.904,-60.904,-62.592,-62.592) |
geographic |
Arctic Rowe |
geographic_facet |
Arctic Rowe |
genre |
Arctic Somateria mollissima |
genre_facet |
Arctic Somateria mollissima |
op_source |
Integrative Biology Publications |
op_relation |
https://scholar.uwindsor.ca/ibiopub/68 doi:10.1086/688044 https://scholar.uwindsor.ca/context/ibiopub/article/1067/viewcontent/Energetic_physiology_mediates_individual_optimization_of_breeding.pdf |
op_doi |
https://doi.org/10.1086/688044 |
container_title |
The American Naturalist |
container_volume |
188 |
container_issue |
4 |
container_start_page |
434 |
op_container_end_page |
445 |
_version_ |
1768382947588571136 |