Number of the records: 1

Longitudinal demographic study of wild populations of African annual killifish

SYSNO ASEP	0488800
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Longitudinal demographic study of wild populations of African annual killifish
Author(s)	Vrtílek, Milan (UBO-W)_{RID, ORCID, SAI} Žák, Jakub (UBO-W)_{RID, ORCID, SAI} Polačik, Matej (UBO-W)_{RID, SAI, ORCID} Blažek, Radim (UBO-W)_{RID, ORCID, SAI} Reichard, Martin (UBO-W)_{RID, ORCID, SAI, SAI}
Number of authors	5
Article number	4774
Source Title	Scientific Reports. - : Nature Publishing Group - ISSN 2045-2322 Roč. 8, č. 1 (2018)
Number of pages	12 s.
Language	eng - English
Country	GB - United Kingdom
Keywords	annual nothobranchius fishes ; short-lived fish ; adult sex-ratio ; life-span ; natural-populations ; senescence ; mortality ; evolution ; furzeri ; model
Subject RIV	EG - Zoology
OECD category	Zoology
R&D Projects	GA16-00291S GA ČR - Czech Science Foundation (CSF)
Institutional support	UBO-W - RVO:68081766
UT WOS	000427684900005
EID SCOPUS	85044210928
DOI	10.1038/s41598-018-22878-6
Annotation	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.
Workplace	Institute of Vertebrate Biology
Contact	Hana Slabáková, slabakova@ivb.cz, Tel.: 543 422 524
Year of Publishing	2019

Number of the records: 1