Proximate effects of temperature versus evolved intrinsic constraints for embryonic development times among temperate and tropical songbirds

Abstract The relative importance of intrinsic constraints imposed by evolved physiological trade-offs versus the proximate effects of temperature for interspecific variation in embryonic development time remains unclear. Understanding this distinction is important because slow development due to evo...

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Autores principales: Riccardo Ton, Thomas E. Martin
Formato: article
Lenguaje:EN
Publicado: Nature Portfolio 2017
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Acceso en línea:https://doaj.org/article/eafe7d5989aa47bbb309df929f6f0506
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spelling oai:doaj.org-article:eafe7d5989aa47bbb309df929f6f05062021-12-02T11:40:42ZProximate effects of temperature versus evolved intrinsic constraints for embryonic development times among temperate and tropical songbirds10.1038/s41598-017-00885-32045-2322https://doaj.org/article/eafe7d5989aa47bbb309df929f6f05062017-04-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-00885-3https://doaj.org/toc/2045-2322Abstract The relative importance of intrinsic constraints imposed by evolved physiological trade-offs versus the proximate effects of temperature for interspecific variation in embryonic development time remains unclear. Understanding this distinction is important because slow development due to evolved trade-offs can yield phenotypic benefits, whereas slow development from low temperature can yield costs. We experimentally increased embryonic temperature in free-living tropical and north temperate songbird species to test these alternatives. Warmer temperatures consistently shortened development time without costs to embryo mass or metabolism. However, proximate effects of temperature played an increasingly stronger role than intrinsic constraints for development time among species with colder natural incubation temperatures. Long development times of tropical birds have been thought to primarily reflect evolved physiological trade-offs that facilitate their greater longevity. In contrast, our results indicate a much stronger role of temperature in embryonic development time than currently thought.Riccardo TonThomas E. MartinNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-9 (2017)
institution DOAJ
collection DOAJ
language EN
topic Medicine
R
Science
Q
spellingShingle Medicine
R
Science
Q
Riccardo Ton
Thomas E. Martin
Proximate effects of temperature versus evolved intrinsic constraints for embryonic development times among temperate and tropical songbirds
description Abstract The relative importance of intrinsic constraints imposed by evolved physiological trade-offs versus the proximate effects of temperature for interspecific variation in embryonic development time remains unclear. Understanding this distinction is important because slow development due to evolved trade-offs can yield phenotypic benefits, whereas slow development from low temperature can yield costs. We experimentally increased embryonic temperature in free-living tropical and north temperate songbird species to test these alternatives. Warmer temperatures consistently shortened development time without costs to embryo mass or metabolism. However, proximate effects of temperature played an increasingly stronger role than intrinsic constraints for development time among species with colder natural incubation temperatures. Long development times of tropical birds have been thought to primarily reflect evolved physiological trade-offs that facilitate their greater longevity. In contrast, our results indicate a much stronger role of temperature in embryonic development time than currently thought.
format article
author Riccardo Ton
Thomas E. Martin
author_facet Riccardo Ton
Thomas E. Martin
author_sort Riccardo Ton
title Proximate effects of temperature versus evolved intrinsic constraints for embryonic development times among temperate and tropical songbirds
title_short Proximate effects of temperature versus evolved intrinsic constraints for embryonic development times among temperate and tropical songbirds
title_full Proximate effects of temperature versus evolved intrinsic constraints for embryonic development times among temperate and tropical songbirds
title_fullStr Proximate effects of temperature versus evolved intrinsic constraints for embryonic development times among temperate and tropical songbirds
title_full_unstemmed Proximate effects of temperature versus evolved intrinsic constraints for embryonic development times among temperate and tropical songbirds
title_sort proximate effects of temperature versus evolved intrinsic constraints for embryonic development times among temperate and tropical songbirds
publisher Nature Portfolio
publishDate 2017
url https://doaj.org/article/eafe7d5989aa47bbb309df929f6f0506
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AT thomasemartin proximateeffectsoftemperatureversusevolvedintrinsicconstraintsforembryonicdevelopmenttimesamongtemperateandtropicalsongbirds
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