Catriona Harington

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The widespread extinctions of large mammals at the end of the Pleistocene epoch have often been attributed to the depredations of humans; here we present genetic evidence that questions this assumption. We used ancient DNA and Bayesian techniques to reconstruct a detailed genetic history of bison throughout the late Pleistocene and Holocene epochs. Our(More)
1626-1631. 11. Hallstrom, I., Blanck, A., and Atuma, S. (1984). Genetic variation in cytochrome P-450 and xenobiotic metabolism in Drosophila melanogaster. Biochem. Pharmacol. 33, 13-20. 12. Snook, R.R., Cleland, S.Y., Wolfner, M.F., and Karr, T.L. (2000). Offsetting effects of Wolbachia infection and heat shock on sperm production in Drosophila simulans:(More)
Lions were the most widespread carnivores in the late Pleistocene, ranging from southern Africa to the southern USA, but little is known about the evolutionary relationships among these Pleistocene populations or the dynamics that led to their extinction. Using ancient DNA techniques, we obtained mitochondrial sequences from 52 individuals sampled across(More)
A peat deposit on Ellesmere Island, Nunavut, Canada, allows a unique glimpse of the Early Pliocene terrestrial biota north of the Arctic Circle. The peat accumulated in a beaver pond surrounded by boreal larch forest near regional tree line in coastal hills close to the Arctic Ocean. The ecological affinities of the plant and beetle remains contained in the(More)
Instrumental records reveal that the current rate of Arctic warming greatly exceeds mean global warming. However, Arctic temperatures during the Pliocene were considerably warmer than present, making it an excellent time period for investigating potential consequences of current warming trends. Here we focus on an early Pliocene (4 to 5 Ma) peat deposit(More)
The bear-sized ground sloth Megalonyx, endemic to North America, was widespread during the Pleistocene, reaching as far north as Alaska, Yukon, and Northwest Territories. Twenty-two specimens collected from 10 localities in the Old Crow Basin, northern Yukon, include several bones that can be referred to Jefferson’s ground sloth (Megalonyx jeffersonii) on(More)
Saiga antelopes (Saiga tatarica), presently confined to Central Asia, spread westward to England and eastward to the Northwest Territories of Canada during the late Pleistocene. Two saiga cranial fragments from the Yukon Territory and the Northwest Territories have yielded radiocarbon dates of 13 390 ± 180 and 14 920 ± 160 B.P. respectively. Thus, saigas(More)
This review deals only with the evolutionary history of core Arctic marine mammals: polar bear (Ursus maritimus), walrus (Odobenus rosmarus), bearded seal (Erignathus barbatus), harp seal (Pagophilus groenlandica), ringed seal (Phoca hispida), bowhead whale (Balaena mysticetus), white whale (Delphinapterus leucas), and narwhal (Monodon monoceras). Sections(More)