Alaska’s wild salmon are getting smaller

For years, people in Alaska have been noticing that wild salmon were getting smaller, but the reasons have been unclear. In the new study, published August 19 in Nature Communications, researchers compiled and analyzed data collected over six decades (1957 to 2018) from 12.5 million fish by the Alaska Department of Fish and Game. This unprecedented dataset enabled them to see patterns of body size changes for four species of salmon, Chinook, chum, coho, and sockeye, across all regions of Alaska. The results showed that the decreases in body size are primarily due to salmon returning to their spawning grounds at younger ages than they have in the past. >click to read< 11:24

Leave a Reply

This site uses Akismet to reduce spam. Learn how your comment data is processed.