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Tiger trout are known to be highly piscivorous, meaning the eat fish and are a good control against rough fish populations. This makes tigers popular with many fish stocking programs Tiger trout are one of the ways the DWR is working on controlling the Utah Chub populations in Scofield Reservoir. Tiger trout population numbers can be tightly controlled as well, since they are sterile. Our Burt Brothers quiz question tonight is. What two fish are used to create the tiger trout?