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[en] The fossorial life-history emerged as a response to hostile environmental conditions, such as extreme temperatures and dryness. It evolved independently in different lineages of amphibians, which are particularly vulnerable to dehydration and require a continuous level of humidity because of their permeable skin. For the first time, we test the hypothesis that amphibians are able to adapt their fossorial behaviour to substrate humidity, using the Pacific horned frogs (Ceratophrys stolzmanni) from the Ecuadorian dry forest as a model. When exposed to dry substrate, the animals burrowed much deeper than the ones in wet soil. The capacity to excavate was particularly high in this species: frogs from the dry treatment could be found at more than one-meter depth after just a few hours. Our results reveal a conditional strategy that contributes to explain the persistence of amphibians in dry environments.
Research Center/Unit :
FOCUS - Freshwater and OCeanic science Unit of reSearch - ULiège
Disciplines :
Environmental sciences & ecology Zoology
Author, co-author :
Székely, Diana ; Université de Liège - ULiège > Laboratory of Fish and Amphibian Ethology > Form. doct. sc. (biol. orga. & écol. - paysage)
Cogălniceanu, Dan; Ovidius University Constanța
Székely, Paul; Universidad Técnica Particular de Loja
Denoël, Mathieu ; Université de Liège - ULiège > Département de Biologie, Ecologie et Evolution > Biologie du comportement - Ethologie et psychologie animale
Language :
English
Title :
Dryness affects burrowing depth in a semi-fossorial amphibian
Publication date :
August 2018
Journal title :
Journal of Arid Environments
ISSN :
0140-1963
eISSN :
1095-922X
Publisher :
Elsevier, Atlanta, United States
Volume :
155
Pages :
79-81
Peer reviewed :
Peer Reviewed verified by ORBi
Funders :
F.R.S.-FNRS - Fonds de la Recherche Scientifique WBI - Wallonie-Bruxelles International SENESCYT - Secretaría de Educación Superior Ciencia Tecnología e Innovación
Funding text :
PS and DC received funding from Ecuadorian SENESCYT through Prometeo Project. MD is a Senior Research Associate at Fonds de la Recherche Scientifique –FNRS and was supported by F.R.S. grant J.0112.16. The collaborative research between the Walloon and Romanian teams was supported by a grant from Wallonie-Bruxelles International and CCCDI-UEFISCDI (ANCS), project number 105BM/2017.
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