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
Materias:	Medicine R Science Q
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
work_keys_str_mv	AT riccardoton proximateeffectsoftemperatureversusevolvedintrinsicconstraintsforembryonicdevelopmenttimesamongtemperateandtropicalsongbirds AT thomasemartin proximateeffectsoftemperatureversusevolvedintrinsicconstraintsforembryonicdevelopmenttimesamongtemperateandtropicalsongbirds
_version_	1718395615040241664

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

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