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Cortisol (pg/ml swab) response after a 5 min of hand restraint in green treefrogs (A), American toads (B), Northern leopard frogs (C), cricket frogs (D), axolotls (E), red-spotted newts (F), rough-skinned newt (G) and mudpuppy (H). Pre-stress values (dashed lines) were taken prior to the stressor and 0 min represent sample taken immediately after stressor concluded.
