Yellowstone Releases First “Judas Fish”

As Kirk Johnson reports in yesterday’s New York Times, Yellowstone National Park biologists are hoping that lake trout fitted with radio transmitters will lead them to the eggs of their invasive brethren.  “The superintendent at Yellowstone National Park, Daniel N. Wenk, says he thinks the park has no choice but to fight for the cutthroats, which he described as the keystone species for a mostly still-wild ecosystem.”