Seasonal changes in body shape and mass in a lotic-breeding and externally fertilizing salamander Hynobius kimurae

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Why is it important?

Both sexes immigrate from land to water for aquatic hibernation during fall. Reproduction-related morphological traits change during a prolonged period from fall to spring. Reproduction-related morphological traits change between the terrestrial and aquatic phases. Reproduction-related morphological traits change according to physiological condition. Sexual dimorphism is detected in the shape of the male’s tail.