July 7, 2017 — The deaths of six North Atlantic right whales in the Gulf of St. Lawrence last month have raised alarms among whale biologists who fear for the future of one of the rarest whales on the planet.
Robert Kenney, a marine mammal expert at the University of Rhode Island’s Graduate School of Oceanography, called the unexpected deaths “a major concern” because the population of right whales totals fewer than 500 animals and their numbers have been declining since 2011. The dead whales represent more than 1 percent of the population.
While the deaths raise many questions, one of the first, according to Kenney, is what were they doing in the Gulf of St. Lawrence in the first place?
“Right whales go to the same places to feed every year — the Great South Channel, the Bay of Fundy, the Nova Scotia shelf — feeding grounds they probably learned from their mothers in their first year of life,” said Kenney, who manages the sighting database for the North Atlantic Right Whale Consortium. “But recently they seem to be wandering farther afield. If there’s not enough food where they traditionally feed, they go to other places. That’s what we think is going on.”
What caused the deaths of the six whales in the Gulf of St. Lawrence — the water body surrounded by Newfoundland, Quebec, Nova Scotia and New Brunswick — is uncertain. Preliminary results of necropsies on three of the animals showed evidence of blunt trauma from ship strikes on two of the whales and fishing gear entanglement on the third. But a news release from Canada’s Marine Animal Response Society said other problems that “may have predisposed these animals to this trauma cannot be ruled out at this stage.”