Arctic marine life is notoriously difficult to study because of its remoteness. But drones have enabled scientists to monitor and diagnose Arctic whales while being minimally invasive, according to a study published in the journal BMC Veterinary Research.
The drones collect samples of whale breath, or “blow,” from humpback, sperm and fin whales in the northeast Atlantic to screen for pathogens. And using this data, researchers have “confirmed for the first time that a potentially deadly whale virus” is “circulating above the Arctic Circle,” said a news release about the study. The pathogen, cetacean morbillivirus, can cause “immunosuppression and severe disease in cetaceans,” said NPR. The disease has previously caused “several mass die-offs” of whales, dolphins and porpoises.
When whales come to the surface of the ocean to breathe, they “release a plume of air mixed with microscopic droplets from their blowholes,” said Discover. The droplets “carry traces of cells, microbes and viruses from the animals’ respiratory systems.” Researchers “hovered the drone over a whale that looked like it was about to blow” and then “captured the exhales on petri dishes,” said NPR.
“Drone blow sampling is a game changer,” Terry Dawson, a professor at King’s College in London and a co-author of the study, said in the release. Drone surveillance can also identify deadly threats to other marine life before they spread.
Arctic wildlife is facing challenges that include “shifting prey” and shrinking territory, said Discover. Climate change is warming the seas, and the “expanding shipping routes and growing human presence are altering habitats that many species rely on for feeding and migration.” And infectious disease can “compound those pressures, particularly when animals are stressed or concentrated in smaller areas.” |