Cutthroat trout are a type of salmon. The scientists in this study wanted to find out if cutthroat trout behave like other salmonids. Other salmonids had been found to swim into preferred locations once more dominant fish had been removed. Dr. Young and his colleagues guessed that when they removed the most dominant cutthroat trout from a mountain river, other trout would quickly move into the locations the more dominant fish had occupied. Note: In earlier Natural Inquirer articles like this one Topics: Water, Wildlife, Dominant Species, Habitat, Radio Transmitter, Rivers and Streams, Salmon, Trout.