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

Type Article
Date 2020-03
Language English
Author(s) Rozen-Rechels David1, Dupoue AndreazORCID2, Meylan Sandrine1, Qitout Kenza1, Decenciere BeatrizORCID3, Agostini Simon3, Le Galliard Jean-FrancoisORCID1, 3
Affiliation(s) 1 : Sorbonne Univ, CNRS, INRA, Inst Ecol & Sci Environm,Inst Rech Dev, 4 Pl Jussieu, F-75252 Paris 5, France.
2 : Univ Toulouse III Paul Sabatier, Stn Eecol Theor & Expt, CNRS, UMR 5321, 2 Route CNRS, F-09200 Moulis, France.
3 : Paris Sci & Lettres Res Univ, Ctr Rech Ecol Expt & Predict CEREEP Ecotron IleDe, Ecole Normale Super, Dept Biol,CNRS,UMR 3194, 78 Rue Chateau, F-77140 St Pierre Les Nemours, France.
Source Physiological And Biochemical Zoology (1522-2152) (Univ Chicago Press), 2020-03 , Vol. 93 , N. 2 , P. 160-174
DOI 10.1086/707409
WOS© Times Cited 11
Keyword(s) body temperature, water availability, activity, evaporative water loss, exploration, metabolism, reptiles

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.

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Rozen-Rechels David, Dupoue Andreaz, Meylan Sandrine, Qitout Kenza, Decenciere Beatriz, Agostini Simon, Le Galliard Jean-Francois (2020). Acclimation to Water Restriction Implies Different Paces for Behavioral and Physiological Responses in a Lizard Species. Physiological And Biochemical Zoology, 93(2), 160-174. Publisher's official version : , Open Access version :