Ideas:
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Aboriginal American dogs: Why so few remain. Although historians and anthropologists had observed that, by the mid-nineteenth century, dog populations associated with Indigenous groups often appeared to be primarily of European descent, the almost complete disappearance of aboriginal canine DNA in the Americas only began to be verified genetically at the end of the twentieth century. Elucidating the biological and sociocultural reasons for this disappearance requires correlating historical, anthropological, and genetic data. What happened was not an analog to the destruction of Indigenous human groups as only certain population pressures applied to both species, such as disease, intentional destruction in warfare, and geographic removal of human populations. Other factors, such as interbreeding with European dogs, were far more rapid and extensive than occurred among human populations.
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