Two polar bears at the Oregon Zoo are helping biologists test new scanning equipment that could provide a non-invasive way to monitor bears in the wild.
While the bears were occupied with frozen treats to keep them in place, scientists trained the laser scanner on them from a roof above their enclosure.
“Nora and Amelia Gray were so fun to work with,” said Lindsey Mangipane, polar bear biologist with the U.S. Fish and Wildlife Service. “And their care staff did a great job getting them in a good position that we could conduct the scans.”
Researchers usually go out on the sea ice and capture wild polar bears in the spring to weigh them, but that has become more difficult with global warming, Mangipane said. The hope is to eliminate the need for the large metal tripod traditionally used to weigh the bears, which requires that they be captured and immobilized, according to Mangipane.
Similar laser technology was used by the National Park Service to image brown bears in Katmai National Park for Fat Bear Week, giving Mangipane and her colleagues the idea to adapt the laser imaging system to other bears in the wild. This is the first time the technology is being used on bears with known weights, allowing the team to accurately calibrate the laser technology, Mangipane said.
Weight is a sign of good health in bears, and being able to track the weights of polar bears could provide insights on the health implications of climate change on the species, according to Mangipane.
“A fat bear is a healthy bear,” Mangipane said. “It’s a really important metric we use as biologists to look at the general health of a population.”
Amelia and Nora have been helping researchers for several years. Nora participates in research on caloric requirements for wild polar bears, spending time in a swim chamber designed to monitor her condition and movements, according to the zoo. Before moving to Oregon, Amelia was one of a few bears testing the Burr on Fur prototype designed by 3M – a science and innovation company – to give scientists a better way to monitor wild bears, the zoo said.
This isn’t the first polar duo at the Oregon Zoo to contribute to science. In 2012, polar bears Conrad and Tasul became the first of their species to give blood without anesthetic – a breakthrough in improved animal welfare, according to Amy Cutting, interim director of animal care and conservation at Oregon Zoo.
Tasul also worked with polar bear scientist Karyn Rode to provide more information about climate change’s effect on the diets of wild polar bears, and on developing a more accurate tracking collar, the announcement said.
“We still have gaps in understanding how climate change is affecting polar bears, so it’s essential that the bears in our care help scientists learn more about their species,” Cutting said. “Zoo bears are perfect candidates to help because they already participate in many health-care behaviors voluntarily.”
Oregon Zoo is a part of several studies with the Polar Bear Research Council. The council has released its 2022 Polar Bear Research Masterplan, providing a roadmap to critical studies for polar bear conservation.
– Austin De Dios
Original Article: Source