Tiger trout are infertile. This is caused by the dissimilarity between the chromosome numbers of the two parent species. Brook trout have 84 chromosomes, browns have just 80. This does not mean that the fish taste bad or are unhealthy. Quite the opposite, in fact. Try eating yours stuffed with fiddleheads this spring. Click here for the recipe. If you're interested in fishing for native tigers (or monster Wisconsin browns and brookies), contact Len Harris at Driftless Area Trout Adventures, 608-647-5356, a_trout_angler@yahoo.com.