population structure Argentina 58 nonhuman 30 Animals 28 controlled study 22 article 18 genetic differentiation 18 animal 16 female 16 genetic structure 16 human 16 Atlantic Ocean 14 South America 14 genetic marker 14 genetic variation 14 male 14 priority journal 14 Article 12 Population structure 12 abundance 12 gene flow 12 population distribution 12 Humans 10 Patagonia 10 genetic variability 10 mitochondrial DNA 10 phytoplankton 10 population genetics 10 Chagas Disease 8 Conservation 8