Higher rates of prebreeding condition gain positively impacts clutch size : a mechanistic test of the condition- dependent individual optimization model
A combination of timing of and body condition (i.e., mass) at arrival on the breeding grounds interact to influence the optimal combination of the timing of reproduction and clutch size in migratory species. This relationship has been formalized by Rowe et al. in a condition-dependent individual opt...
Published in: | Functional Ecology |
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Main Authors: | , , , , , , |
Format: | Other/Unknown Material |
Language: | English |
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Blackwell Scientific Publications
2020
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Online Access: | https://hdl.handle.net/20.500.11794/40357 https://doi.org/10.1111/1365-2435.13133 |
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ftunivlavalcorp:oai:corpus.ulaval.ca:20.500.11794/40357 2024-06-23T07:50:54+00:00 Higher rates of prebreeding condition gain positively impacts clutch size : a mechanistic test of the condition- dependent individual optimization model Hennin, Holly L. Bêty, Joël Dey, Cody J. Gilchrist, H. Grant Legagneux, Pierre Williams, Tony D. Love, Oliver P. 2020-09-08T10:51:04Z application/pdf https://hdl.handle.net/20.500.11794/40357 https://doi.org/10.1111/1365-2435.13133 eng eng Blackwell Scientific Publications 0269-8463 http://hdl.handle.net/20.500.11794/40357 doi:10.1111/1365-2435.13133 http://purl.org/coar/access_right/c_abf2 Clutch size Common eider Condition gain Fattening rate Individual optimization Laying date Path analysis Triglyceride Eider à duvet -- Reproduction Eider à duvet -- Physiologie article de recherche COAR1_1::Texte::Périodique::Revue::Contribution à un journal::Article::Article de recherche 2020 ftunivlavalcorp https://doi.org/20.500.11794/4035710.1111/1365-2435.13133 2024-06-10T23:42:53Z A combination of timing of and body condition (i.e., mass) at arrival on the breeding grounds interact to influence the optimal combination of the timing of reproduction and clutch size in migratory species. This relationship has been formalized by Rowe et al. in a condition-dependent individual optimization model (American Naturalist, 1994, 143, 689-722), which has been empirically tested and validated in avian species with a capital-based breeding strategy. This model makes a key, but currently untested prediction; that variation in the rate of body condition gain will shift the optimal combination of laying date and clutch size. This prediction is essential because it implies that individuals can compensate for the challenges associated with late timing of arrival or poor body condition at arrival on the breeding grounds through adjustment of their life history investment decisions, in an attempt to maximize fitness. Using an 11-year data set in arctic-nesting common eiders (Somateria mollissima), quantification of fattening rates using plasma triglycerides (an energetic metabolite), and a path analysis approach, we test this prediction of this optimization model; controlling for arrival date and body condition, females that fatten more quickly will adjust the optimal combination of lay date and clutch size, in favour of a larger clutch size. As predicted, females fattening at higher rates initiated clutches earlier and produced larger clutch sizes, indicating that fattening rate is an important factor in addition to arrival date and body condition in predicting individual variation in reproductive investment. However, there was no direct effect of fattening rate on clutch size (i.e., birds laying on the same date had similar clutch sizes, independent of their fattening rate). Instead, fattening rate indirectly affected clutch size via earlier lay dates, thus not supporting the original predictions of the optimization model. Our results demonstrate that variation in the rate of condition gain allows ... Other/Unknown Material Arctic Common Eider Eider à duvet Somateria mollissima Université Laval: CorpusUL Arctic Rowe ENVELOPE(-60.904,-60.904,-62.592,-62.592) Functional Ecology 32 8 2019 2028 |
institution |
Open Polar |
collection |
Université Laval: CorpusUL |
op_collection_id |
ftunivlavalcorp |
language |
English |
topic |
Clutch size Common eider Condition gain Fattening rate Individual optimization Laying date Path analysis Triglyceride Eider à duvet -- Reproduction Eider à duvet -- Physiologie |
spellingShingle |
Clutch size Common eider Condition gain Fattening rate Individual optimization Laying date Path analysis Triglyceride Eider à duvet -- Reproduction Eider à duvet -- Physiologie Hennin, Holly L. Bêty, Joël Dey, Cody J. Gilchrist, H. Grant Legagneux, Pierre Williams, Tony D. Love, Oliver P. Higher rates of prebreeding condition gain positively impacts clutch size : a mechanistic test of the condition- dependent individual optimization model |
topic_facet |
Clutch size Common eider Condition gain Fattening rate Individual optimization Laying date Path analysis Triglyceride Eider à duvet -- Reproduction Eider à duvet -- Physiologie |
description |
A combination of timing of and body condition (i.e., mass) at arrival on the breeding grounds interact to influence the optimal combination of the timing of reproduction and clutch size in migratory species. This relationship has been formalized by Rowe et al. in a condition-dependent individual optimization model (American Naturalist, 1994, 143, 689-722), which has been empirically tested and validated in avian species with a capital-based breeding strategy. This model makes a key, but currently untested prediction; that variation in the rate of body condition gain will shift the optimal combination of laying date and clutch size. This prediction is essential because it implies that individuals can compensate for the challenges associated with late timing of arrival or poor body condition at arrival on the breeding grounds through adjustment of their life history investment decisions, in an attempt to maximize fitness. Using an 11-year data set in arctic-nesting common eiders (Somateria mollissima), quantification of fattening rates using plasma triglycerides (an energetic metabolite), and a path analysis approach, we test this prediction of this optimization model; controlling for arrival date and body condition, females that fatten more quickly will adjust the optimal combination of lay date and clutch size, in favour of a larger clutch size. As predicted, females fattening at higher rates initiated clutches earlier and produced larger clutch sizes, indicating that fattening rate is an important factor in addition to arrival date and body condition in predicting individual variation in reproductive investment. However, there was no direct effect of fattening rate on clutch size (i.e., birds laying on the same date had similar clutch sizes, independent of their fattening rate). Instead, fattening rate indirectly affected clutch size via earlier lay dates, thus not supporting the original predictions of the optimization model. Our results demonstrate that variation in the rate of condition gain allows ... |
format |
Other/Unknown Material |
author |
Hennin, Holly L. Bêty, Joël Dey, Cody J. Gilchrist, H. Grant Legagneux, Pierre Williams, Tony D. Love, Oliver P. |
author_facet |
Hennin, Holly L. Bêty, Joël Dey, Cody J. Gilchrist, H. Grant Legagneux, Pierre Williams, Tony D. Love, Oliver P. |
author_sort |
Hennin, Holly L. |
title |
Higher rates of prebreeding condition gain positively impacts clutch size : a mechanistic test of the condition- dependent individual optimization model |
title_short |
Higher rates of prebreeding condition gain positively impacts clutch size : a mechanistic test of the condition- dependent individual optimization model |
title_full |
Higher rates of prebreeding condition gain positively impacts clutch size : a mechanistic test of the condition- dependent individual optimization model |
title_fullStr |
Higher rates of prebreeding condition gain positively impacts clutch size : a mechanistic test of the condition- dependent individual optimization model |
title_full_unstemmed |
Higher rates of prebreeding condition gain positively impacts clutch size : a mechanistic test of the condition- dependent individual optimization model |
title_sort |
higher rates of prebreeding condition gain positively impacts clutch size : a mechanistic test of the condition- dependent individual optimization model |
publisher |
Blackwell Scientific Publications |
publishDate |
2020 |
url |
https://hdl.handle.net/20.500.11794/40357 https://doi.org/10.1111/1365-2435.13133 |
long_lat |
ENVELOPE(-60.904,-60.904,-62.592,-62.592) |
geographic |
Arctic Rowe |
geographic_facet |
Arctic Rowe |
genre |
Arctic Common Eider Eider à duvet Somateria mollissima |
genre_facet |
Arctic Common Eider Eider à duvet Somateria mollissima |
op_relation |
0269-8463 http://hdl.handle.net/20.500.11794/40357 doi:10.1111/1365-2435.13133 |
op_rights |
http://purl.org/coar/access_right/c_abf2 |
op_doi |
https://doi.org/20.500.11794/4035710.1111/1365-2435.13133 |
container_title |
Functional Ecology |
container_volume |
32 |
container_issue |
8 |
container_start_page |
2019 |
op_container_end_page |
2028 |
_version_ |
1802641839873851392 |