Context-dependent fitness costs of reproduction despite stable body mass costs in an Arctic herbivore
1.The cost of reproduction on demographic rates is often assumed to operate through changing body condition. Several studies have found that reproduction depresses body mass more if the current conditions are severe, such as high population densities or adverse weather, than under benign environment...
Published in: | Journal of Animal Ecology |
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Main Authors: | , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
Wiley
2021
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Subjects: | |
Online Access: | https://hdl.handle.net/10037/23386 https://doi.org/10.1111/1365-2656.13593 |
id |
ftunivtroemsoe:oai:munin.uit.no:10037/23386 |
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record_format |
openpolar |
institution |
Open Polar |
collection |
University of Tromsø: Munin Open Research Archive |
op_collection_id |
ftunivtroemsoe |
language |
English |
topic |
VDP::Mathematics and natural science: 400::Zoology and botany: 480::Marine biology: 497 VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Marinbiologi: 497 |
spellingShingle |
VDP::Mathematics and natural science: 400::Zoology and botany: 480::Marine biology: 497 VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Marinbiologi: 497 Pigeon, Gabriel Albon, Steve Loe, Leif Egil Bischof, Richard Bonenfant, Christophe Ropstad, Erik Veiberg, Vebjørn Stien, Audun Context-dependent fitness costs of reproduction despite stable body mass costs in an Arctic herbivore |
topic_facet |
VDP::Mathematics and natural science: 400::Zoology and botany: 480::Marine biology: 497 VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Marinbiologi: 497 |
description |
1.The cost of reproduction on demographic rates is often assumed to operate through changing body condition. Several studies have found that reproduction depresses body mass more if the current conditions are severe, such as high population densities or adverse weather, than under benign environmental conditions. However, few studies have investigated the association between the fitness components and body mass costs of reproduction. 2.Using 25 years of individual-based capture–recapture data from Svalbard reindeer Rangifer tarandus platyrhynchus, we built a novel Bayesian state-space model that jointly estimated interannual change in mass, annual reproductive success and survival, while accounting for incomplete observations. The model allowed us to partition the differential effects of intrinsic and extrinsic factors on both non-reproductive mass change and the body mass cost of reproduction, and to quantify their consequences on demographic rates. 3. Contrary to our expectation, the body mass cost of reproduction (mean = –5.8 kg) varied little between years (CV = 0.08), whereas the between-year variation in body mass changes, that were independent of the previous year's reproductive state, varied substantially (CV = 0.4) in relation to autumn temperature and the amount of rain-on-snow in winter. This body mass loss led to a cost of reproduction on the next reproduction, which was amplified by the same environmental covariates, from a 10% reduction in reproductive success in benign years, to a 50% reduction in harsh years. The reproductive mass loss also resulted in a small reduction in survival. 4. Our results show how demographic costs of reproduction, driven by interannual fluctuations in individual body condition, result from the balance between body mass costs of reproduction and body mass changes that are independent of previous reproductive state. We illustrate how a strong context-dependent fitness cost of reproduction can occur, despite a relatively fixed body mass cost of reproduction. This suggests that female reindeer display a very conservative energy allocation strategy, either aborting their reproductive attempt at an early stage or weaning at a relatively constant cost. Such a strategy might be common in species living in a highly stochastic and food limited environment. |
format |
Article in Journal/Newspaper |
author |
Pigeon, Gabriel Albon, Steve Loe, Leif Egil Bischof, Richard Bonenfant, Christophe Ropstad, Erik Veiberg, Vebjørn Stien, Audun |
author_facet |
Pigeon, Gabriel Albon, Steve Loe, Leif Egil Bischof, Richard Bonenfant, Christophe Ropstad, Erik Veiberg, Vebjørn Stien, Audun |
author_sort |
Pigeon, Gabriel |
title |
Context-dependent fitness costs of reproduction despite stable body mass costs in an Arctic herbivore |
title_short |
Context-dependent fitness costs of reproduction despite stable body mass costs in an Arctic herbivore |
title_full |
Context-dependent fitness costs of reproduction despite stable body mass costs in an Arctic herbivore |
title_fullStr |
Context-dependent fitness costs of reproduction despite stable body mass costs in an Arctic herbivore |
title_full_unstemmed |
Context-dependent fitness costs of reproduction despite stable body mass costs in an Arctic herbivore |
title_sort |
context-dependent fitness costs of reproduction despite stable body mass costs in an arctic herbivore |
publisher |
Wiley |
publishDate |
2021 |
url |
https://hdl.handle.net/10037/23386 https://doi.org/10.1111/1365-2656.13593 |
geographic |
Arctic Svalbard |
geographic_facet |
Arctic Svalbard |
genre |
Arctic Arctic Rangifer tarandus Rangifer tarandus platyrhynchus Svalbard svalbard reindeer |
genre_facet |
Arctic Arctic Rangifer tarandus Rangifer tarandus platyrhynchus Svalbard svalbard reindeer |
op_relation |
Journal of Animal Ecology info:eu-repo/grantAgreement/RCN/POLARPROG/216051/Norway/Predicting effects of climate change on Svalbard reindeer population dynamics: a mechanistic approach // info:eu-repo/grantAgreement/RCN/KLIMAFORSK/244647/Norway/Sustainable management of renewable resources in a changing environment: an integrated approach across ecosystems// info:eu-repo/grantAgreement/RCN/KLIMAFORSK/267613/Norway/Trapped in a cold-adapted body: the causes and consequences of phenotypic change in a rapidly warming Arctic// Pigeon G, Albon, Loe LE, Bischof R, Bonenfant C, Forchhammer MC, Irvine RJ, Ropstad E, Veiberg V, Stien A. Context-dependent fitness costs of reproduction despite stable body mass costs in an Arctic herbivore. Journal of Animal Ecology. 2021 FRIDAID 1946271 doi:10.1111/1365-2656.13593 0021-8790 1365-2656 https://hdl.handle.net/10037/23386 |
op_rights |
openAccess Copyright 2021 The Author(s) |
op_doi |
https://doi.org/10.1111/1365-2656.13593 |
container_title |
Journal of Animal Ecology |
_version_ |
1766299058453872640 |
spelling |
ftunivtroemsoe:oai:munin.uit.no:10037/23386 2023-05-15T14:26:29+02:00 Context-dependent fitness costs of reproduction despite stable body mass costs in an Arctic herbivore Pigeon, Gabriel Albon, Steve Loe, Leif Egil Bischof, Richard Bonenfant, Christophe Ropstad, Erik Veiberg, Vebjørn Stien, Audun 2021-09-20 https://hdl.handle.net/10037/23386 https://doi.org/10.1111/1365-2656.13593 eng eng Wiley Journal of Animal Ecology info:eu-repo/grantAgreement/RCN/POLARPROG/216051/Norway/Predicting effects of climate change on Svalbard reindeer population dynamics: a mechanistic approach // info:eu-repo/grantAgreement/RCN/KLIMAFORSK/244647/Norway/Sustainable management of renewable resources in a changing environment: an integrated approach across ecosystems// info:eu-repo/grantAgreement/RCN/KLIMAFORSK/267613/Norway/Trapped in a cold-adapted body: the causes and consequences of phenotypic change in a rapidly warming Arctic// Pigeon G, Albon, Loe LE, Bischof R, Bonenfant C, Forchhammer MC, Irvine RJ, Ropstad E, Veiberg V, Stien A. Context-dependent fitness costs of reproduction despite stable body mass costs in an Arctic herbivore. Journal of Animal Ecology. 2021 FRIDAID 1946271 doi:10.1111/1365-2656.13593 0021-8790 1365-2656 https://hdl.handle.net/10037/23386 openAccess Copyright 2021 The Author(s) VDP::Mathematics and natural science: 400::Zoology and botany: 480::Marine biology: 497 VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Marinbiologi: 497 Journal article Tidsskriftartikkel Peer reviewed publishedVersion 2021 ftunivtroemsoe https://doi.org/10.1111/1365-2656.13593 2021-12-15T23:55:29Z 1.The cost of reproduction on demographic rates is often assumed to operate through changing body condition. Several studies have found that reproduction depresses body mass more if the current conditions are severe, such as high population densities or adverse weather, than under benign environmental conditions. However, few studies have investigated the association between the fitness components and body mass costs of reproduction. 2.Using 25 years of individual-based capture–recapture data from Svalbard reindeer Rangifer tarandus platyrhynchus, we built a novel Bayesian state-space model that jointly estimated interannual change in mass, annual reproductive success and survival, while accounting for incomplete observations. The model allowed us to partition the differential effects of intrinsic and extrinsic factors on both non-reproductive mass change and the body mass cost of reproduction, and to quantify their consequences on demographic rates. 3. Contrary to our expectation, the body mass cost of reproduction (mean = –5.8 kg) varied little between years (CV = 0.08), whereas the between-year variation in body mass changes, that were independent of the previous year's reproductive state, varied substantially (CV = 0.4) in relation to autumn temperature and the amount of rain-on-snow in winter. This body mass loss led to a cost of reproduction on the next reproduction, which was amplified by the same environmental covariates, from a 10% reduction in reproductive success in benign years, to a 50% reduction in harsh years. The reproductive mass loss also resulted in a small reduction in survival. 4. Our results show how demographic costs of reproduction, driven by interannual fluctuations in individual body condition, result from the balance between body mass costs of reproduction and body mass changes that are independent of previous reproductive state. We illustrate how a strong context-dependent fitness cost of reproduction can occur, despite a relatively fixed body mass cost of reproduction. This suggests that female reindeer display a very conservative energy allocation strategy, either aborting their reproductive attempt at an early stage or weaning at a relatively constant cost. Such a strategy might be common in species living in a highly stochastic and food limited environment. Article in Journal/Newspaper Arctic Arctic Rangifer tarandus Rangifer tarandus platyrhynchus Svalbard svalbard reindeer University of Tromsø: Munin Open Research Archive Arctic Svalbard Journal of Animal Ecology |