Mike Mullaney, a longtime fixture in the bond management world of Boston, most recently at Boston Partners, where he was head of taxable fixed income, is leaving to take an equity portfolio management job at Fiduciary Trust Corporation in Boston. Mullaney says that after 18 years of bond management, including a 14-year stint at Putnam Investments, he was looking for a new challenge. He says he is looking forward to working with FTC's growing high net-worth individual practice, and that he will start in the "next couple of weeks." Bill Leach, who will run the Boston Partner's bond efforts out of its Los Angeles office, will replace him. Leach did not return a phone call seeking comment by press time.