Hair Color, Molt, and Testis Size in Male Short-Tailed Weasels Treated with Melatonin

    August 1969 in “ Science ”
    C Rust, Roland K. Meyer
    TLDR Melatonin causes weasels to grow white fur and become reproductively inactive.
    The study investigated the effects of melatonin on hair color, molting, and testis size in male short-tailed weasels. The research aimed to understand how melatonin treatment influenced these physiological traits, which are typically affected by seasonal changes. The findings suggested that melatonin played a role in altering hair color and molting patterns, as well as affecting testis size, indicating its potential impact on reproductive and seasonal adaptations in these animals. However, the document did not specify the number of weasels involved in the study, which is important for assessing the strength of the findings.
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