The Green River fisheries biologists endorsing the Mac Attack are concerned that the large number of lake trout less than 25 inches in the reservoir consume a significant number of juvenile kokanee. A population estimate completed this year found the number of small lake trout is three times greater than similar estimates from the 1980s, or over 143,000 small lake trout in Flaming Gorge today. Recent research also indicated that juvenile kokanee make up approximately 25% of the diet of small lake trout, suggesting that predation by small lake trout can significantly reduce the population of kokanee salmon and trout in the reservoir.