CONSERVATION, Reptiles & amphibians, Research, Behavior, Lizards, Seasons, Foraging behavior, Metabolism, Zoological research, Body temperature, Foraging, Food and nutrition, Bioenergetics, Pedioplanis husabensis, Husab Sand Lizard, désert du Namib, doubly labeled water, taux métabolique sur le terrain, field metabolic rate, Namib Desert, eau doublement marq...