Individual heterogeneity in fitness in a long‐lived herbivore

Abstract Heterogeneity in the intrinsic quality and nutritional condition of individuals affects reproductive success and consequently fitness. Black brant (Branta bernicla nigricans) are long‐lived, migratory, specialist herbivores. Long migratory pathways and short summer breeding seasons constrai...

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Autores principales:	Madeleine G. Lohman, Thomas V. Riecke, Perry J. Williams, James S. Sedinger
Formato:	article
Lenguaje:	EN
Publicado:	Wiley 2021
Materias:	black brant breeding probability fitness life‐history reproduction survival Ecology QH540-549.5
Acceso en línea:	https://doaj.org/article/9a824a4a5a4d4b43ad67c1103e128f8a
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spelling	oai:doaj.org-article:9a824a4a5a4d4b43ad67c1103e128f8a2021-11-08T17:10:41ZIndividual heterogeneity in fitness in a long‐lived herbivore2045-775810.1002/ece3.8197https://doaj.org/article/9a824a4a5a4d4b43ad67c1103e128f8a2021-11-01T00:00:00Zhttps://doi.org/10.1002/ece3.8197https://doaj.org/toc/2045-7758Abstract Heterogeneity in the intrinsic quality and nutritional condition of individuals affects reproductive success and consequently fitness. Black brant (Branta bernicla nigricans) are long‐lived, migratory, specialist herbivores. Long migratory pathways and short summer breeding seasons constrain the time and energy available for reproduction, thus magnifying life‐history trade‐offs. These constraints, combined with long lifespans and trade‐offs between current and future reproductive value, provide a model system to examine the role of individual heterogeneity in driving life‐history strategies and individual heterogeneity in fitness. We used hierarchical Bayesian models to examine reproductive trade‐offs, modeling the relationships between within‐year measures of reproductive energy allocation and among‐year demographic rates of individual females breeding on the Yukon‐Kuskokwim Delta, Alaska, using capture–recapture and reproductive data from 1988 to 2014. We generally found that annual survival tended to be buffered against variation in reproductive investment, while breeding probability varied considerably over the range of clutch size‐laying date combinations. We provide evidence for relationships between breeding probability and clutch size, breeding probability and nest initiation date, and an interaction between clutch size and initiation date. Average lifetime clutch size also had a weak positive relationship with apparent survival probability. Our results support the use of demographic buffering strategies for black brant. These results also indirectly suggest associations among environmental conditions during growth, fitness, and energy allocation, highlighting the effects of early growth conditions on individual heterogeneity, and subsequently, lifetime reproductive investment.Madeleine G. LohmanThomas V. RieckePerry J. WilliamsJames S. SedingerWileyarticleblack brantbreeding probabilityfitnesslife‐historyreproductionsurvivalEcologyQH540-549.5ENEcology and Evolution, Vol 11, Iss 21, Pp 15164-15173 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	black brant breeding probability fitness life‐history reproduction survival Ecology QH540-549.5
spellingShingle	black brant breeding probability fitness life‐history reproduction survival Ecology QH540-549.5 Madeleine G. Lohman Thomas V. Riecke Perry J. Williams James S. Sedinger Individual heterogeneity in fitness in a long‐lived herbivore
description	Abstract Heterogeneity in the intrinsic quality and nutritional condition of individuals affects reproductive success and consequently fitness. Black brant (Branta bernicla nigricans) are long‐lived, migratory, specialist herbivores. Long migratory pathways and short summer breeding seasons constrain the time and energy available for reproduction, thus magnifying life‐history trade‐offs. These constraints, combined with long lifespans and trade‐offs between current and future reproductive value, provide a model system to examine the role of individual heterogeneity in driving life‐history strategies and individual heterogeneity in fitness. We used hierarchical Bayesian models to examine reproductive trade‐offs, modeling the relationships between within‐year measures of reproductive energy allocation and among‐year demographic rates of individual females breeding on the Yukon‐Kuskokwim Delta, Alaska, using capture–recapture and reproductive data from 1988 to 2014. We generally found that annual survival tended to be buffered against variation in reproductive investment, while breeding probability varied considerably over the range of clutch size‐laying date combinations. We provide evidence for relationships between breeding probability and clutch size, breeding probability and nest initiation date, and an interaction between clutch size and initiation date. Average lifetime clutch size also had a weak positive relationship with apparent survival probability. Our results support the use of demographic buffering strategies for black brant. These results also indirectly suggest associations among environmental conditions during growth, fitness, and energy allocation, highlighting the effects of early growth conditions on individual heterogeneity, and subsequently, lifetime reproductive investment.
format	article
author	Madeleine G. Lohman Thomas V. Riecke Perry J. Williams James S. Sedinger
author_facet	Madeleine G. Lohman Thomas V. Riecke Perry J. Williams James S. Sedinger
author_sort	Madeleine G. Lohman
title	Individual heterogeneity in fitness in a long‐lived herbivore
title_short	Individual heterogeneity in fitness in a long‐lived herbivore
title_full	Individual heterogeneity in fitness in a long‐lived herbivore
title_fullStr	Individual heterogeneity in fitness in a long‐lived herbivore
title_full_unstemmed	Individual heterogeneity in fitness in a long‐lived herbivore
title_sort	individual heterogeneity in fitness in a long‐lived herbivore
publisher	Wiley
publishDate	2021
url	https://doaj.org/article/9a824a4a5a4d4b43ad67c1103e128f8a
work_keys_str_mv	AT madeleineglohman individualheterogeneityinfitnessinalonglivedherbivore AT thomasvriecke individualheterogeneityinfitnessinalonglivedherbivore AT perryjwilliams individualheterogeneityinfitnessinalonglivedherbivore AT jamesssedinger individualheterogeneityinfitnessinalonglivedherbivore
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Individual heterogeneity in fitness in a long‐lived herbivore

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