The Genetic Variation of the Fiddler Crab Found Only Taiwan

Previous studies have indicated that the population of the endemic fiddler crab X. formosensis was large and stable in the past. However, recent anthropogenic activities have led to a rapid decline in population and suitable habitat along Taiwan's western coast. Therefore, it is imperative to comprehend the genetic variation of X. formosensis for effective conservation strategies. We examined the genetic structure of seven X. formosensis populations using DNA fingerprinting and COI analysis. The result revealed over 90% genetic variation within populations, along with a weak population genetic structure. Additionally, we unexpectedly discovered that X. formosensis exhibits relatively high nucleotide and genetic diversity, suggesting the potential for population recovery given suitable habitat conservation measures. Overall, our research aims to protect and manage this endangered crab species, establishing a foundation to prevent further genetic loss.

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