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Acclimation to Water Restriction Implies Different Paces for Behavioral and Physiological Responses in a Lizard Species.

Acclimation to Water Restriction Implies Different Paces for Behavioral and Physiological Responses in a Lizard Species.

Authors :
Rozen-Rechels D
Dupoué A
Meylan S
Qitout K
Decencière B
Agostini S
Le Galliard JF
Source :
Physiological and biochemical zoology : PBZ [Physiol Biochem Zool] 2020 Mar/Apr; Vol. 93 (2), pp. 160-174.
Publication Year :
2020

Abstract

Chronic changes in climate conditions may select for acclimation responses in terrestrial animals living in fluctuating environments, and beneficial acclimation responses may be key to the resilience of these species to global changes. Despite evidence that climate warming induces changes in water availability, acclimation responses to water restriction are understudied compared with thermal acclimation. In addition, acclimation responses may involve different modes, paces, and trade-offs between physiological and behavioral traits. Here, we tested the dynamical acclimation responses of a dry-skinned terrestrial ectotherm to chronic water restriction. Yearling common lizards ( Zootoca vivipara ) were exposed to sublethal water restriction during 2 mo of the summer season in laboratory conditions, then released in outdoor conditions for 10 additional months. Candidate behavioral (exploration, basking, and thermal preferences) and physiological (metabolism at rest and standard water loss rate) traits potentially involved in the acclimation response were measured repeatedly during and after water restriction. We observed a sequential acclimation response in water-restricted animals (yearlings spent less time basking during the first weeks of water deprivation) that was followed by delayed sex-specific physiological consequences of the water restriction during the following months (thermal depression in males and lower standard evaporative water loss rates in females). Despite short-term negative effects of water restriction on body growth, annual growth, survival, and reproduction were not significantly different between water-restricted and control yearlings. This demonstrates that beneficial acclimation responses to water restriction involve both short-term flexible behavioral responses and delayed changes in thermal and water biology traits.

Details

Language :
English
ISSN :
1537-5293
Volume :
93
Issue :
2
Database :
MEDLINE
Journal :
Physiological and biochemical zoology : PBZ
Publication Type :
Academic Journal
Accession number :
32031477
Full Text :
https://doi.org/10.1086/707409