When food enters the small intestine, bile travels through the common bile duct to reach the duodenum. Gallstones are hard deposits that form inside the gallbladder when there is too much bilirubin or cholesterol in the bile.
That said, there is a considerable consensus that all three major trout species (brook, brown and rainbow) begin to experience some level of stress at around 68Â°F (20Â°C), with that stress increasing rapidly as the temperature rises further.
Stream trout lakes. The DNR manages roughly 180 lakes for stream trout. Because stream trout don't reproduce in lakes, regular stocking is required to sustain these fisheries. Each year, the DNR stocks these waters with a total of roughly 400,000 rainbow trout, 150,000 splake, 90,000 brook trout, and 20,000 brown trout.