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The loss of genetic diversity in small or isolated populations can increase inbreeding, decrease fitness and adaptive potential and increase a species’ probability of extinction. In species with life histories that naturally result in small populations and/or low levels of gene flow, patterns of anthropogenically induced genetic erosion can be obscured by evolutionary history; yet these species may still be susceptible to genetic loss. Leer más.

This week’s spotlight animal is a critically endangered species that livesexclusively in the dry spiny forests of southern and southwestern Madagascar. This herbivore is considered one of the most beautiful tortoises in the world, but unfortunately it is also one of the rarest. Explorers, meet the radiated tortoise (Astrochelys radiata). Leer más.