Articles, books and book chapters

@article{rozen-rechels_water_2020,

title = {Water restriction induces behavioral fight but impairs thermoregulation in a dry-skinned ectotherm},

author = {David Rozen-Rechels and Arnaud Badiane and Simon Agostini and Sandrine Meylan and Jean-François Le Galliard},

url = {https://onlinelibrary.wiley.com/doi/abs/10.1111/oik.06910},

doi = {10.1111/oik.06910},

issn = {1600-0706},

year  = {2020},

date = {2020-01-01},

urldate = {2020-02-11},

journal = {Oikos},

volume = {129},

number = {4},

pages = {572--584},

abstract = {Behavioral fight responses to desiccation risk are important to predict the vulnerability of terrestrial animals to climate change and yet, they have received little attention so far. In terrestrial ectotherms, behavioral regulation of the water balance (i.e. hydroregulation) is likely to be plastic and may tradeoff with thermoregulation behavior because water loss rates are generally higher in warmer environments and body temperatures. When low water availability and heat stress cause physiological dehydration, we expect to highlight a shift to behavioral water-conservation strategies including changes in activity patterns, micro-habitat selection and thermoregulation strategies. Here, we compared the behavior of adult common lizards Zootoca vivipara in indoor arenas that either had a permanent access to water or underwent a one-week long experimental water restriction. Water-restricted lizards reduced their behavioral activity, selected more often cooler and wetter refuges during daytime, and performed less accurate thermoregulation than control lizards. The activity of water-restricted gravid females shifted towards the cooler and wetter early hours of the day. In addition, they had lower body temperatures and preferred lower body temperatures at the end of the experiment (i.e. thermal depression). Water-restricted lizards suffered from a mild physiological dehydration and had a lower mass change. Heat stress was simulated every second day, which led to a range of heat avoidance and water conservation strategies independent from water restriction. Altogether, these results confirm that chronic water restriction and dehydration induce responses towards water conservation that conflict with thermoregulation accuracy.},

keywords = {activity, body temperature, dehydration, space use, squamate reptiles, water availability},

pubstate = {published},

tppubtype = {article}

}

@article{rozenrechels_short-term_2020,

title = {Short-term change in water availability influences thermoregulation behaviours in a dry-skinned ectotherm},

author = {David Rozen‐Rechels and Pauline Farigoule and Simon Agostini and Arnaud Badiane and Sandrine Meylan and Jean-François Le Galliard},

url = {https://besjournals.onlinelibrary.wiley.com/doi/abs/10.1111/1365-2656.13279},

doi = {10.1111/1365-2656.13279},

issn = {1365-2656},

year  = {2020},

date = {2020-01-01},

urldate = {2020-08-03},

journal = {Journal of Animal Ecology},

volume = {89},

number = {9},

pages = {2099-2110},

abstract = {Mechanistic models of terrestrial ectotherms predict that climate warming will induce activity restriction due to heat stress and loss of shade, leading to the extinction of numerous populations. Such models rely on the assumption that activity patterns are dictated by simple temperature thresholds independent of changes in water availability. However, changes in water availability may further influence thermoregulation behaviour of ectotherms through dehydration risk perception, changes in water balance or changes in microclimatic conditions. Here, we experimentally assess the interactive effects of thermal conditions and water availability on activity patterns, shade selection and thermoregulation efficiency in a model ectothermic species. Thermoregulation behaviour of adult common lizards Zootoca vivipara was monitored in outdoor mesocosms as we manipulated water availability, providing water as mist in the morning and free-standing water during the daytime. We recorded operative temperatures and micro-meteorological conditions to infer thermal constraints and dehydration risk. Activity and shade selection were better predicted by continuous changes in thermal conditions and dehydration risk, respectively, than by threshold functions. In addition, water supplementation increased activity in males and reduced shade selection in both sexes, most probably as a behavioural response to the perception of a stronger dehydration risk. Water supplementation also influenced the thermal quality of the environment, which in turn altered daily activity patterns and thermoregulation statistics. This demonstrates that dual effects of heat and water stress on activity patterns may lead to stronger activity restriction as a result of climate change than currently predicted.},

keywords = {activity, body temperature, dehydration, squamate reptiles, thermoregulation, water availability},

pubstate = {published},

tppubtype = {article}

}

@article{rozen-rechels_acclimation_2020,

title = {Acclimation to water restriction implies different paces for behavioral and physiological responses in a lizard species},

author = {David Rozen-Rechels and Andréaz Dupoué and Sandrine Meylan and Kenza Qitout and Beatriz Decencière and Simon Agostini and Jean-François Le Galliard},

url = {https://www.journals.uchicago.edu/doi/abs/10.1086/707409},

doi = {10.1086/707409},

issn = {1522-2152},

year  = {2020},

date = {2020-01-01},

urldate = {2019-12-11},

journal = {Physiological and Biochemical Zoology},

volume = {93},

number = {2},

pages = {160--174},

keywords = {activity, body temperature, exploration, metabolism, squamate reptiles, water availability, water loss},

pubstate = {published},

tppubtype = {article}

}

@article{rozen-rechels_water_2018,

title = {Water restriction in viviparous lizards causes transgenerational effects on behavioral anxiety and immediate effects on exploration behavior},

author = {David Rozen-Rechels and Andréaz Dupoué and Sandrine Meylan and Beatriz Decencière and Sophie Guingand and Jean-François Le Galliard},

url = {https://doi.org/10.1007/s00265-018-2443-4},

doi = {10.1007/s00265-018-2443-4},

issn = {1432-0762},

year  = {2018},

date = {2018-01-01},

urldate = {2019-09-13},

journal = {Behavioral Ecology and Sociobiology},

volume = {72},

number = {2},

pages = {23},

abstract = {Behavioral plasticity induced by maternal effects is crucial in adjusting offspring phenotype to match the environment. In particular, changes in water availability during development may initiate a range of behavioral responses, such as natal dispersal, but the contribution of maternal effects from water stress in explaining behavioral variation has been overlooked so far. In this study, we examined behavioral plasticity of juvenile common lizards (Zootoca vivipara) in response to changes in pre-natal and post-natal hydric conditions. We exposed pregnant mothers either to a moderate water restriction or to ad libitum access to water. We used neutral arena tests to measure repeatedly activity and space use behaviors of their offspring, either in dry or wet soil conditions, at two distinct life stages (juveniles and yearlings) in order to quantify behavioral flexibility, age differences, and personalities (consistent inter-individual differences). Juveniles and yearlings had greater exploration scores in dry than wet conditions regardless of the pre-natal conditions. Pre-natal water restriction and dry post-natal conditions enhanced thigmotaxis (i.e., a behavior related to anxiety) in juveniles. Maternal environment did not influence behavioral flexibility nor the behavior of yearlings. Behaviors were barely repeatable in juveniles and inconsistent through early life. Assuming that dry conditions may initiate flight responses, these results suggest complex relationships between the developmental timing of water stress, exploration and anxiety behaviors, and dispersal syndromes.Significance statementWater restriction should initiate a range of behaviors related to a flight response. However, there is little evidence that changes in water availability across development influence offspring behavior in wild animals. Experiments with lizards demonstrate that maternal water restriction increased the anxiety of their juveniles, whereas their exploration was higher in dry environments. Thus, water availability may be a critical determinant of space use behavior and dispersal syndromes.},

keywords = {maternal effect, squamate reptiles, stress, thigmotaxis, water availability},

pubstate = {published},

tppubtype = {article}

}