This Sept. 26, 2018 file photo provided by the National Park Service shows NPS staff unloading a crated gray wolf from a United States Fish & Wildlife Service aircraft at Isle Royale National Park in Michigan. Credit: National Park Service via AP, File Wolves on a remote island in Lake Superior appear to be thriving, but they're making deep dents in the moose population that they rely on as a leading food source, according to a report released Monday. Isle Royale is a 134,000-acre (54,200-hectare) national park in far western Lake Superior between Grand Marais, Minnesota, and Thunder Bay, Canada. The island is a natural laboratory, offering scientists a rare opportunity to observe wolves and moose largely free from human influence. Researchers have conducted wolf and moose population surveys on the island since 1958. The surveys had been an annual winter event when the roadless island is closed to visitors, but researchers have run into obstacles in recent years.…