Longitudinal demographic study of wild populations of African annual killifish

Abstract The natural history of model organisms is often overlooked despite its importance to correctly interpret the outcome of laboratory studies. Ageing is particularly understudied in natural populations. To address this gap, we present lifetime demographic data from wild populations of an annua...

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Autores principales:	Milan Vrtílek, Jakub Žák, Matej Polačik, Radim Blažek, Martin Reichard
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2018
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/bae0f65307f94935a25f0880453bedaf
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spelling	oai:doaj.org-article:bae0f65307f94935a25f0880453bedaf2021-12-02T15:08:06ZLongitudinal demographic study of wild populations of African annual killifish10.1038/s41598-018-22878-62045-2322https://doaj.org/article/bae0f65307f94935a25f0880453bedaf2018-03-01T00:00:00Zhttps://doi.org/10.1038/s41598-018-22878-6https://doaj.org/toc/2045-2322Abstract The natural history of model organisms is often overlooked despite its importance to correctly interpret the outcome of laboratory studies. Ageing is particularly understudied in natural populations. To address this gap, we present lifetime demographic data from wild populations of an annual species, the turquoise killifish, Nothobranchius furzeri, a model species in ageing research, and two other species of coexisting annual killifishes. Annual killifish hatch synchronously, have non-overlapping generations, and reproduce daily after reaching sexual maturity. Data from 13 isolated savanna pools in southern Mozambique demonstrate that the pools supporting killifish populations desiccated 1–4 months after their filling, though some pools persisted longer. Declines in population size over the season were stronger than predicted, because they exceeded the effect of steady habitat shrinking on population density that, contrary to the prediction, decreased. Populations of N. furzeri also became more female-biased with progressing season suggesting that males had lower survival. Nothobranchius community composition did not significantly vary across the season. Our data clearly demonstrate that natural populations of N. furzeri and its congeners suffer strong mortality throughout their lives, with apparent selective disappearance (condition-dependent mortality) at the individual level. This represents selective force that can shape the evolution of lifespan, and its variation across populations, beyond the effects of the gradient in habitat persistence.Milan VrtílekJakub ŽákMatej PolačikRadim BlažekMartin ReichardNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 8, Iss 1, Pp 1-12 (2018)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Milan Vrtílek Jakub Žák Matej Polačik Radim Blažek Martin Reichard Longitudinal demographic study of wild populations of African annual killifish
description	Abstract The natural history of model organisms is often overlooked despite its importance to correctly interpret the outcome of laboratory studies. Ageing is particularly understudied in natural populations. To address this gap, we present lifetime demographic data from wild populations of an annual species, the turquoise killifish, Nothobranchius furzeri, a model species in ageing research, and two other species of coexisting annual killifishes. Annual killifish hatch synchronously, have non-overlapping generations, and reproduce daily after reaching sexual maturity. Data from 13 isolated savanna pools in southern Mozambique demonstrate that the pools supporting killifish populations desiccated 1–4 months after their filling, though some pools persisted longer. Declines in population size over the season were stronger than predicted, because they exceeded the effect of steady habitat shrinking on population density that, contrary to the prediction, decreased. Populations of N. furzeri also became more female-biased with progressing season suggesting that males had lower survival. Nothobranchius community composition did not significantly vary across the season. Our data clearly demonstrate that natural populations of N. furzeri and its congeners suffer strong mortality throughout their lives, with apparent selective disappearance (condition-dependent mortality) at the individual level. This represents selective force that can shape the evolution of lifespan, and its variation across populations, beyond the effects of the gradient in habitat persistence.
format	article
author	Milan Vrtílek Jakub Žák Matej Polačik Radim Blažek Martin Reichard
author_facet	Milan Vrtílek Jakub Žák Matej Polačik Radim Blažek Martin Reichard
author_sort	Milan Vrtílek
title	Longitudinal demographic study of wild populations of African annual killifish
title_short	Longitudinal demographic study of wild populations of African annual killifish
title_full	Longitudinal demographic study of wild populations of African annual killifish
title_fullStr	Longitudinal demographic study of wild populations of African annual killifish
title_full_unstemmed	Longitudinal demographic study of wild populations of African annual killifish
title_sort	longitudinal demographic study of wild populations of african annual killifish
publisher	Nature Portfolio
publishDate	2018
url	https://doaj.org/article/bae0f65307f94935a25f0880453bedaf
work_keys_str_mv	AT milanvrtilek longitudinaldemographicstudyofwildpopulationsofafricanannualkillifish AT jakubzak longitudinaldemographicstudyofwildpopulationsofafricanannualkillifish AT matejpolacik longitudinaldemographicstudyofwildpopulationsofafricanannualkillifish AT radimblazek longitudinaldemographicstudyofwildpopulationsofafricanannualkillifish AT martinreichard longitudinaldemographicstudyofwildpopulationsofafricanannualkillifish
_version_	1718388275507363840

Longitudinal demographic study of wild populations of African annual killifish

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