SEATTLE — Researchers say there’s a new calf among the population of critically endangered killer whales that live in the waters between Washington and Canada. Ken Balcomb, founding director of the Center for Whale Research, told The Seattle Times that staff first saw the calf Friday at the eastern end of the Strait of Juan de Fuca. The youngster looks healthy, but survival rates for baby orcas are only about 50 percent, he said. The whales have been starving amid a dearth of salmon.