September 10, 2018 — Scientists have found a reliable gathering place east of Cape Cod for the elusive and little-known True’s beaked whales, following a month’s effort this summer.
“It was huge for us,” Danielle Cholewiak, research ecologist at the National Oceanic and Atmospheric Administration Northeast Fisheries Science Center in Woods Hole, said. Cholewiak was chief scientist for the trip east of Georges Bank, on the edge of the continental shelf.
Only a dozen sightings of True’s beaked whale had occurred since 1913 when Smithsonian Institution curator Frederick True first identified and named the species from an animal stranded on a North Carolina beach. But the dedicated study in July 200 miles east of Cape Cod yielded dozens of sightings, acoustic recordings, genetic samples and photographs, Cholewiak said.
The repeated sightings of whales during the trip allowed scientists to begin a tracking database. The whales now named Elvis and Trident are the “founding members” of the North Atlantic True’s beaked whale photo identification catalog. With over 300 acoustic detections from a hydrophone towed 24 hours a day across the research area the scientists were able to map out where the animals were living, Cholewiak said. The first-time use on a True’s beaked whale of a suction-cup digital recording tag, for 12 hours, is expected to reveal new information about their movements and acoustic behavior.
“This is a 5- or 6-meter whale that we didn’t know anything about until now,” said Dee Allen, research program officer for the Marine Mammal Commission, who was on the trip. In its oversight role of other federal agencies, the commission wants to make sure that the best available science is used for decision-making. There is great value in new or more information on a species that is little-known, Allen said.
“It shows that it can be done,” Allen said. “We can continue to learn more about beaked whales.”