title: Hydroregulation in a tropical dry-skinned ectotherm.
abstract: While temperature effects on species' vulnerability to climate change are well studied, desiccation effects receive comparatively little attention. In addition, we poorly understand the capacity of ectotherms, and especially reptiles, to control water loss rates behaviourally by selecting suitable microhabitats. This study examined water loss rates and behavioural hydroregulation in the tropical rainforest skink Carlia rubrigularis to assess whether this dry-skinned ectotherm actively avoids desiccation and whether trade-offs occur between desiccation avoidance and selection of optimal temperatures, as previously shown in amphibians. Higher temperatures elicited humid refuge choice despite placing individuals in suboptimal thermal conditions, as indicated by preferred substrate temperatures. This finding emphasizes the importance of water loss even for taxa traditionally assumed to be highly desiccation resistant, and highlights this factor's potential influence on vulnerability to climate change by limiting activity times or by restricting individuals to thermally suboptimal microhabitats.
authors.affiliation: Centre for Tropical Biodiversity and Climate Change, College of Marine and Environmental Sciences, James Cook University, Cairns, QLD, 4878, Australia. Anna.Pintor@my.jcu.edu.au.
authors.forename: Anna F V
authors.initials: AF
authors.lastname: Pintor
authors.affiliation: Centre for Tropical Biodiversity and Climate Change, College of Marine and Environmental Sciences, James Cook University, Townsville, QLD, 4811, Australia.
authors.forename: Lin
authors.initials: L
authors.lastname: Schwarzkopf
authors.affiliation: Centre for Tropical Biodiversity and Climate Change, College of Marine and Environmental Sciences, James Cook University, Cairns, QLD, 4878, Australia.
authors.forename: Andrew K
authors.initials: AK
authors.lastname: Krockenberger
mesh_terms: D000818:Animals; D057231:Climate Change; D017753:Ecosystem; D008116:Lizards; D065947:Rainforest; D013696:Temperature; D014882:Water-Electrolyte Balance
keywords: Climate change; Desiccation threshold; Lizards; Skinks; Water loss