Heritability, plasticity and canalization of Ural owl egg size in a cyclic environment
Abstract Avian egg size is highly variable on the population level, but is considered inflexible on the individual level. On the basis of 2969 measurements of individual eggs collected during 1981–2005, we analysed heritability, plasticity and selection on egg size in the Ural owl, a long‐lived bird...
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crwiley:10.1111/j.1420-9101.2007.01468.x 2023-12-03T10:31:28+01:00 Heritability, plasticity and canalization of Ural owl egg size in a cyclic environment KONTIAINEN, P. BROMMER, J. E. KARELL, P. PIETIÄINEN, H. 2007 http://dx.doi.org/10.1111/j.1420-9101.2007.01468.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1420-9101.2007.01468.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1420-9101.2007.01468.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Evolutionary Biology volume 21, issue 1, page 88-96 ISSN 1010-061X 1420-9101 Ecology, Evolution, Behavior and Systematics journal-article 2007 crwiley https://doi.org/10.1111/j.1420-9101.2007.01468.x 2023-11-09T13:22:02Z Abstract Avian egg size is highly variable on the population level, but is considered inflexible on the individual level. On the basis of 2969 measurements of individual eggs collected during 1981–2005, we analysed heritability, plasticity and selection on egg size in the Ural owl, a long‐lived bird that preys on voles. Vole abundance varied in a 3‐year cycle, creating varying food supply across the cycle’s phases. Ural owl egg size is heritable ( h 2 = 60%). Ural owls lay larger eggs in improved food conditions. On the basis of repeated breeding records of 59 females that bred in all vole cycle phases, we show that intra‐individual adjustment (plasticity) explained 22.4% of the variation in egg size across phases. Egg size was under stabilizing selection. Extremely small and extremely large eggs had reduced hatchability, and individuals who laid either large or small eggs had lower lifetime fledgling production than the ones laying intermediately sized eggs. Our findings illustrate how maternal investment in egg size can both be heritable and highly responsive to variable environmental conditions, and suggest that variation in the investment in egg size across individuals is canalized. Article in Journal/Newspaper Ural Owl Wiley Online Library (via Crossref) Journal of Evolutionary Biology 21 1 88 96 |
institution |
Open Polar |
collection |
Wiley Online Library (via Crossref) |
op_collection_id |
crwiley |
language |
English |
topic |
Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Ecology, Evolution, Behavior and Systematics KONTIAINEN, P. BROMMER, J. E. KARELL, P. PIETIÄINEN, H. Heritability, plasticity and canalization of Ural owl egg size in a cyclic environment |
topic_facet |
Ecology, Evolution, Behavior and Systematics |
description |
Abstract Avian egg size is highly variable on the population level, but is considered inflexible on the individual level. On the basis of 2969 measurements of individual eggs collected during 1981–2005, we analysed heritability, plasticity and selection on egg size in the Ural owl, a long‐lived bird that preys on voles. Vole abundance varied in a 3‐year cycle, creating varying food supply across the cycle’s phases. Ural owl egg size is heritable ( h 2 = 60%). Ural owls lay larger eggs in improved food conditions. On the basis of repeated breeding records of 59 females that bred in all vole cycle phases, we show that intra‐individual adjustment (plasticity) explained 22.4% of the variation in egg size across phases. Egg size was under stabilizing selection. Extremely small and extremely large eggs had reduced hatchability, and individuals who laid either large or small eggs had lower lifetime fledgling production than the ones laying intermediately sized eggs. Our findings illustrate how maternal investment in egg size can both be heritable and highly responsive to variable environmental conditions, and suggest that variation in the investment in egg size across individuals is canalized. |
format |
Article in Journal/Newspaper |
author |
KONTIAINEN, P. BROMMER, J. E. KARELL, P. PIETIÄINEN, H. |
author_facet |
KONTIAINEN, P. BROMMER, J. E. KARELL, P. PIETIÄINEN, H. |
author_sort |
KONTIAINEN, P. |
title |
Heritability, plasticity and canalization of Ural owl egg size in a cyclic environment |
title_short |
Heritability, plasticity and canalization of Ural owl egg size in a cyclic environment |
title_full |
Heritability, plasticity and canalization of Ural owl egg size in a cyclic environment |
title_fullStr |
Heritability, plasticity and canalization of Ural owl egg size in a cyclic environment |
title_full_unstemmed |
Heritability, plasticity and canalization of Ural owl egg size in a cyclic environment |
title_sort |
heritability, plasticity and canalization of ural owl egg size in a cyclic environment |
publisher |
Wiley |
publishDate |
2007 |
url |
http://dx.doi.org/10.1111/j.1420-9101.2007.01468.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1420-9101.2007.01468.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1420-9101.2007.01468.x |
genre |
Ural Owl |
genre_facet |
Ural Owl |
op_source |
Journal of Evolutionary Biology volume 21, issue 1, page 88-96 ISSN 1010-061X 1420-9101 |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1420-9101.2007.01468.x |
container_title |
Journal of Evolutionary Biology |
container_volume |
21 |
container_issue |
1 |
container_start_page |
88 |
op_container_end_page |
96 |
_version_ |
1784257767305904128 |