Additive effects of temperature and water availability on pregnancy in a viviparous lizard

Type Article
Date 2020-10
Language English
Author(s) Brusch George A.1, 5, Gavira Rodrigo S. B.1, Viton Robin1, Dupoue AndreazORCID2, Leroux-Coyau MathieuORCID2, Meylan Sandrine2, Le Galliard Jean-FrancoisORCID2, 3, Lourdais OlivierORCID1, 4
Affiliation(s) 1 : Ctr Natl Rech Sci CNRS, Ctr Etud Biol Chize, F-79360 Villiers En Bois, France.
2 : Sorbonne Univ, CNRS, IRD, Inst Ecol & Sci Environm IEES,INRA, 4 Pl Jussieu, F-75252 Paris 5, France.
3 : PSL Univ, Ecole Normale Super, Dept Biol, CNRS,UMS 3194,Ctr Rech Ocol Expt & Predict CEREEP, 11 Chemin Busseau, F-77140 St Pierre Les Nemours, France.
4 : Arizona State Univ, Sch Life Sci, Tempe, AZ 85281 USA.
5 : Oklahoma State Univ, Dept Integrat Biol, Stillwater, OK 74074 USA.
Source Journal Of Experimental Biology (0022-0949) (Company Biologists Ltd), 2020-10 , Vol. 223 , N. 19 , P. jeb228064 (10p.)
DOI 10.1242/jeb.228064
WOS© Times Cited 6
Keyword(s) Pregnancy, Hydration, Temperature constraints, Oxidative status, Osmotic challenge
Abstract One of the greatest current threats to biodiversity is climate change. However, understanding of organismal responses to fluctuations in temperature and water availability is currently lacking, especially during fundamental life-history stages such as reproduction. To further explore how temperature and water availability impact maternal physiology and reproductive output, we used the viviparous form of the European common lizard (Zootoca vivipara) in a two-by-two factorial design manipulating both hydric and thermal conditions, for the first time. We collected blood samples and morphological measurements during early pregnancy and postparturition to investigate how water availability, temperature and a combination of the two influence maternal phenology, morphology, physiology and reproductive output. We observed that dehydration during gestation negatively affects maternal physiological condition (lower mass gain, higher tail reserve mobilization) but has little effect on reproductive output. These effects are mainly additive to temperature regimes, with a proportional increase in maternal costs in warmer environments. Our study demonstrates the importance of considering combined effects of water and temperature when investigating organismal responses to climate changes, especially during periods crucial for species survival such as reproduction.
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Brusch George A., Gavira Rodrigo S. B., Viton Robin, Dupoue Andreaz, Leroux-Coyau Mathieu, Meylan Sandrine, Le Galliard Jean-Francois, Lourdais Olivier (2020). Additive effects of temperature and water availability on pregnancy in a viviparous lizard. Journal Of Experimental Biology, 223(19), jeb228064 (10p.). Publisher's official version : https://doi.org/10.1242/jeb.228064 , Open Access version : https://archimer.ifremer.fr/doc/00731/84317/