Iowans hunting for animals with fur this weekend are expected to find good numbers of raccoons, coyotes, bobcats, river otters, and mink when the furbearer trapping and hunting season opens Saturday. The market is booming as the trade has gained more than 2,000 trappers each year, for the past three years, highlighted by last year’s total topping 19,000. Ken Kenyon with the Marion County DNR says that beginning this year, the DNR will collect the complete lower jaw or intact skull of bobcats, and river otters for population monitoring purposes, rather than the whole carcass as in the past.