Link: CBC News, Whitehorse Star Yukon wildlife managers brought in temporary caribou hunting restrictions Monday that they hope will save the Porcupine caribou herd's numbers from further decline. The new rules, effective immediately, require hunters to report all the caribou they kill in the Yukon, and to hunt bulls only. As well, licensed Yukon hunters are now limited to hunt just one bull per season. Surveys suggest that Gwich'in and Inuvialuit hunters in the neighbouring Northwest Territories, as well as hunters in Alaska, account for 80 per cent of the 4,000 Porcupine caribou harvested each year. The herd migrates up to 1,500 miles each year between winter range and summer calving grounds.