But the practice remains popular among many fishermen and among fish and game department biologists. Those in favor of catch and release quote Lee Wulff: "A trout is too valuable to be caught only once." Studies on the mortality of released fish shows a very low rate of from 2 to 5 percent—when caught on artificial lures. When using live bait, the mortality rate is about 50 percent. This indicates that using artificial bait is a strong part of catch and release.