Constant mate-switching appears to help maintain strong genetic diversity and avoid inbreeding, even in a relatively small, isolated population of about 2,000 beluga whales. Credit: Shutterstock Beluga whales are among the most challenging marine mammals to study. Much of their lives are spent beneath Arctic waters and sea ice, making direct observation difficult. Now, a long-term DNA study has provided rare insight into how a population of belugas in Bristol Bay, Alaska, forms family

Tag-uri: DNA