4/8/2023 0 Comments Woolly rhinocerosThe researchers said this stability “lasted until well after humans began living in Siberia, contrasting the declines that would be expected if the woolly rhinos went extinct due to hunting”.Ĭo-first author Edana Lord, a PhD student at the Centre for Palaeogenetics, said: “The data we looked at only goes up to 18,500 years ago, which is approximately 4,500 years before their extinction, so it implies that they declined sometime in that gap. We found that, after an increase in population size at the start of a cold period some 29,000 years ago, the woolly rhino population size remained constant and that, at this time, in-breeding was low.” Terrified Greg Rutherford 'ignored testicular lump' after shocking lockdown discoveryĬo-first author Nicolas Dussex, a post-doctoral researcher at the Centre for Palaeogenetics, said: “We examined changes in population size and estimated in-breeding.Coronavirus found on frozen food imported to Chinese cities.The researchers looked at the genome, or genetic material, of the creatures to get a picture of whether there was increased in-breeding or reduced genetic diversity – key indicators of ancient population declines among mammals. Also, the hump on their backs contained a fat reserve. The woolly rhinoceros' thick, long hair allowed it to survive in the extreme cold. If anything, we actually see something looking a bit like an increase in population size during this period.” The woolly rhinoceros lived mainly in lowlands, plateaus, and river valleys, with dry to arid climates and migrated to higher elevations in favorable climate phases. “So, the decline towards extinction of the woolly rhinoceros doesn’t coincide so much with the first appearance of humans in the region. But recently there have been several discoveries of much older human occupation sites, the most famous of which is around 30,000 years old. ![]() Senior study author Love Dalen, a professor of evolutionary genetics at the Centre for Palaeogenetics, a joint venture between Stockholm University and the Swedish Museum of Natural History, said: “It was initially thought that humans appeared in north-eastern Siberia 14,000 or 15,000 years ago, around when the woolly rhinoceros went extinct. The species is 'likely' to have died out because of warming temperatures, scientists have said (Image: Fedor Shidlovsky/Cell Press/PA Wire)
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