July 27, 2016 — A stroll on the beach of a remote Bering Sea island two years ago has produced a scientific breakthrough — the discovery of a previously unidentified species of beaked whale that dwells in the deep waters of the North Pacific Ocean.
The conclusion, described in a study published in the journal Marine Mammal Science of the California-based Society for Marine Mammalogy, stems from the 2014 discovery of a beached whale carcass by a local monitoring program called Island Sentinel. Karin Holser, a teacher on St. George Island in the Pribilofs, alerted authorities, and Michelle Ridgway, a Juneau-based biologist involved with a Pribilof science camp, responded quickly.
“She was the one who said, ‘This looks like a Baird’s beaked whale, but it doesn’t,'” said Phillip Morin, a research molecular geneticist with the National Oceanic and Atmospheric Administration and lead author of the new study.
The whale was about two-thirds the size of a Baird’s beaked whale, which typically grows to 35 or 40 feet, Morin said. It was clearly not a juvenile, as its teeth were worn and yellow, “so they were not baby teeth,” he said. Its skull had a distinct slope and its dorsal fin was different from that of the typical Baird’s beaked whale.
Tissue samples were sent to the Marine Mammal and Turtle Division of NOAA Fisheries’ Southwest Fisheries Science Center in California, where Morin works and where the world’s most extensive collection of cetacean tissues is kept. The whale’s skull was sent to the Smithsonian Institution in Washington — and students from the Pribilofs visited the lab there to take part in the examination.
DNA analysis showed it was a species different from the 22 previously known species of beaked whales in the world and the two known to swim in the North Pacific.