The Bureau of Land Management issued an emergency order banning off-highway vehicle use on 160 acres of public land known as the Yuba Goldfields to protect habitat of spawning Chinook salmon and Central Valley steelhead. The order comes after the federal agency received reports and photos of people riding quads into the river where threatened fish spawn. "They were driving right into the river, right over the spawning 'reds,'" said BLM wildlife biologist Peggy Cranston. "Reds" are gravel areas in the river bed where salmon and steelhead lay their eggs.The federal agency didn't hold a public hearing before calling the …