Their findings highlight the challenge faced by tree frogs: Should they attempt to maintain an optimal temperature for their eggs or risk predation?
When building their nests, tree frogs use a mixed strategy. Sometimes the frogs build nests on the ground and sometimes they build them on tree branches overhanging ponds and marshes. Doctoral student Yukio Ichioka from the Graduate School of Bioagricultural Sciences and his supervisor Professor Kajimura wondered why they did this.
Ichioka and Kajimura found that tree frogs employ a rather complicated egg-laying strategy. When the air temperature was low, the internal temperature in the foam nests on the ground was warmer than that of the surrounding area. "These findings will be an important contribution to understanding the evolution of spawning behavior in amphibians," said Kajimura."They will also shed light on the adaptation strategies of forest organisms to the thermal environment. Our research is important for the relationships between climate and animal behavior and can contribute to understanding the evolution of behavior, especially in the current environment.
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