Increasing surface area of skin for moisture absorption. Wetting of larger skin surface than is in actual contact with water source. Capillarity may increase the force of water uptake from moist surface. Close eyes, tuck limbs, crouching. Avoid desiccation by utilizing moist microhabitat underground.
Temperature is lower and humidity higher at night.
B. Resorption of stored bladder water. Resorb over long dry periods. Generally higher concentration of urea and salts in urine and plasma. Increase rate of urea production and retention as soils dry, decreases osmotic gradient between frog and soil, decreases water loss. D. Increase water uptake by skin via hormone production.