Latitude induced and behaviorally thermoregulated variations in upper thermal tolerance of Rana uenoi and Bufo sachalinensis

We exposed the tadpoles to increasing temperatures and recorded the CTmax for 270 individuals from 11 populations of R. uenoi collected in rice paddies and 240 individuals from ten populations of B. sachalinensis collected in reservoirs. We also recorded the swimming performance and behavior of tadpoles when placed in the experimental apparatus during CTmax measurements.