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Climatic forcing and individual heterogeneity in a resident mountain bird: legacy data reveal effects on reproductive strategies
Optimization of clutch size and timing of reproduction have substantial effects on lifetime reproductive success in vertebrates, and both individual quality and environmental variation may impact life history strategies. We tested hypotheses related to maternal investment and timing of reproduction,...
Autores principales: | , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
The Royal Society
2023
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10206478/ https://www.ncbi.nlm.nih.gov/pubmed/37234506 http://dx.doi.org/10.1098/rsos.221427 |
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author | Eriksen, Lasse Frost Ringsby, Thor Harald Pedersen, Hans Chr. Nilsen, Erlend B. |
author_facet | Eriksen, Lasse Frost Ringsby, Thor Harald Pedersen, Hans Chr. Nilsen, Erlend B. |
author_sort | Eriksen, Lasse Frost |
collection | PubMed |
description | Optimization of clutch size and timing of reproduction have substantial effects on lifetime reproductive success in vertebrates, and both individual quality and environmental variation may impact life history strategies. We tested hypotheses related to maternal investment and timing of reproduction, using 17 years (1978–1994) of individual-based life history data on willow ptarmigan (Lagopus l. lagopus, n = 290 breeding females with n = 319 breeding attempts) in central Norway. We analysed whether climatic variation and individual state variables (age and body mass) affected the number of offspring and timing of reproduction, and individual repeatability in strategies. The results suggest that willow ptarmigan share a common optimal clutch size that is largely independent of measured individual states. While we found no clear direct weather effects on clutch size, higher spring temperatures advanced onset of breeding, and early breeding was followed by an increased number of offspring. Warmer springs were positively related to maternal mass, and mass interacted with clutch size in production of hatchlings. Finally, clutch size and timing of reproduction were highly repeatable within individuals, indicating that individual quality guided trade-offs in reproductive effort. Our results demonstrate how climatic forcing and individual heterogeneity in combination influenced life history traits in a resident montane keystone species. |
format | Online Article Text |
id | pubmed-10206478 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | The Royal Society |
record_format | MEDLINE/PubMed |
spelling | pubmed-102064782023-05-25 Climatic forcing and individual heterogeneity in a resident mountain bird: legacy data reveal effects on reproductive strategies Eriksen, Lasse Frost Ringsby, Thor Harald Pedersen, Hans Chr. Nilsen, Erlend B. R Soc Open Sci Ecology, Conservation and Global Change Biology Optimization of clutch size and timing of reproduction have substantial effects on lifetime reproductive success in vertebrates, and both individual quality and environmental variation may impact life history strategies. We tested hypotheses related to maternal investment and timing of reproduction, using 17 years (1978–1994) of individual-based life history data on willow ptarmigan (Lagopus l. lagopus, n = 290 breeding females with n = 319 breeding attempts) in central Norway. We analysed whether climatic variation and individual state variables (age and body mass) affected the number of offspring and timing of reproduction, and individual repeatability in strategies. The results suggest that willow ptarmigan share a common optimal clutch size that is largely independent of measured individual states. While we found no clear direct weather effects on clutch size, higher spring temperatures advanced onset of breeding, and early breeding was followed by an increased number of offspring. Warmer springs were positively related to maternal mass, and mass interacted with clutch size in production of hatchlings. Finally, clutch size and timing of reproduction were highly repeatable within individuals, indicating that individual quality guided trade-offs in reproductive effort. Our results demonstrate how climatic forcing and individual heterogeneity in combination influenced life history traits in a resident montane keystone species. The Royal Society 2023-05-24 /pmc/articles/PMC10206478/ /pubmed/37234506 http://dx.doi.org/10.1098/rsos.221427 Text en © 2023 The Authors. https://creativecommons.org/licenses/by/4.0/Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, provided the original author and source are credited. |
spellingShingle | Ecology, Conservation and Global Change Biology Eriksen, Lasse Frost Ringsby, Thor Harald Pedersen, Hans Chr. Nilsen, Erlend B. Climatic forcing and individual heterogeneity in a resident mountain bird: legacy data reveal effects on reproductive strategies |
title | Climatic forcing and individual heterogeneity in a resident mountain bird: legacy data reveal effects on reproductive strategies |
title_full | Climatic forcing and individual heterogeneity in a resident mountain bird: legacy data reveal effects on reproductive strategies |
title_fullStr | Climatic forcing and individual heterogeneity in a resident mountain bird: legacy data reveal effects on reproductive strategies |
title_full_unstemmed | Climatic forcing and individual heterogeneity in a resident mountain bird: legacy data reveal effects on reproductive strategies |
title_short | Climatic forcing and individual heterogeneity in a resident mountain bird: legacy data reveal effects on reproductive strategies |
title_sort | climatic forcing and individual heterogeneity in a resident mountain bird: legacy data reveal effects on reproductive strategies |
topic | Ecology, Conservation and Global Change Biology |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10206478/ https://www.ncbi.nlm.nih.gov/pubmed/37234506 http://dx.doi.org/10.1098/rsos.221427 |
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