April 10, 2017 — The quickly fading population of vaquitas sets a worrisome example for those trying to save North Atlantic right whales.
“It has me slightly terrified,” said Woods Hole Oceanographic Institution biologist Mark Baumgartner, who heads up the North Atlantic Right Whale Consortium, at the annual U.S. Marine Mammal Commission meeting, held last week at the Sea Creat Beach Hotel in North Falmouth.
In 1997, scientists first counted 567 of the small porpoises in the Bay of California in Mexico, but in 20 years that has dropped precipitously — to 30 — as the vaquitas drown when caught underwater in gillnets.
The North Atlantic right whale population, at 524 animals, is currently on a downward trend, too, members of the consortium announced in November. This year’s low calving rate —only 3 right whale calves were documented — is one thing, Baumgartner said.
But a low calving rate coupled with increasing deaths due to fishing gear entanglement spells trouble.
“What could we expect in the next 5 to 10 years?” he said.
At the annual commission meeting, scientists delivered the sobering news that, starting in October, several vaquitas would be captured in the wild and placed in a conservation area for safekeeping and breeding. A recent and intense market in China for the swim bladder of totoaba, which is caught illegally in the bay using gillnets, “caught everybody by surprise,” said Peter Thomas, Marine Mammal Commission International and Policy Program Director. The vaquitas get caught in the gillnets and drown; their corpses are then brought up with the fish and are discarded by the fishermen.