Difference between revisions of "Brown Trout"

Brown Trout

Brown trout are native to Europe and were introduce to tributaries in the Grand Canyon in the 1920s. They are capable of withstanding slightly higher temperature than other trout. Unlike most other trout species, brown trout spawn in the late fall. Their spawning behavior, however, is similar to other trout species. Like rainbow trout, young brown trout feed on aquatic and terrestrial insects and invertebrates but brown trout are more apt to switch to eating other fish as they get bigger. The rainbow trout found in Grand Canyon are more likely to continue to eat mostly insects and invertebrates even as adults. Many studies have shown that rainbow trout and native fish like humpback chub often have a difficult time persisting with large populations of brown trout.[1]

Desired Future Condition for the Lees Ferry Trout Fishery

A high quality trout fishery in GCNRA, as further described in the Recreation DFC that does not adversely affect the native aquatic community in GCNP.
• Minimize emigration of non-native fish from the Lees Ferry reach in Glen Canyon National Recreation Area to downstream locations.
• Minimize emigration of non-native warm water fish to the mainstem Colorado River.