The Judas Fish

In Yellowstone National Park scientists have released “Judas fish,” surgically altered lake trout implanted with a radio transmitter, into lakes in order to discover the lake trout’s spawning grounds.  The lake trout are an invasive species which have slowly been killing the native cutthroat trout, whose population in the Yellowstone lakes has been decreasing as they are the trout eaten by the area’s predators while sharing resources with the lake trout, who dwell deep in the lake and are not eaten.  By contrast the lake trout is often found to be endangered in its native lakes.  The goal of finding the breeding grounds is to exterminate it, which may not be the correct approach.  Instead, perhaps the scientists could take and store the trout until they  reach a suitable breeding ground in an area where the lake trout are in danger, such as in the Great Lakes area.  While it may not be successful. they scientists could certainly default back onto their plan of extermination.