These frogs have been steady declining in population due to human cause and non native fish have been preying on them. In recent studies, it has been shown that these little creatures have rapidly been increasing dispite all the things going bad for them. Chief among the culprits in Rana sierrae's once-stark decline is deadly fungal disease called chytridiomycosis, which affects amphibians worldwide and has caused at least 200 species of frogs and salamanders to become extinct within the last 30 years. This fungal disease has believed to be a huge factor in their close to extinction experience. This lead us to a conclusion that frogs have evolved at least partial resistance to the disease. This finding is a huge boost in science because these little guys and others affected by this fungal disease are showing resistance and are evolving.
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