VICTORIA — Hunters in British Columbia kill up to 300 grizzly bears every year, but it is habitat loss that is actually the greatest threat to the imposing predators, says auditor general Carol Bellringer in a report. Growing communities, roads created to expand the forest industry, and oil and gas development in remote areas pose larger dangers to the overall health and growth of the species, says the report released Tuesday. Bellringer’s audit of the B.C. government’s grizzly management plan found an absence of provincial monitoring and inventory strategies, and incomplete commitments to save grizzly populations, estimated at 15,000 provincewide.