What threats did the petition present to show the need to list the Great Basin redband trout?
The petition provided information about a number of threats. The main threat is from the destruction, modification or limitation to the habitat or range of the Great Basin redband trout. Habitat destruction from livestock grazing, irrigation, removal of all water from streams, fragmentation of populations, stream channelization, and timber harvest are present in the Great Basin. Additional threats occur from competition and predation by non-native fish (crappie, bullhead, bass and brook trout) in most lakes and in some streams. The petitioners stated that despite the adaptations of the Great Basin redband trout to harsh environmental conditions, the combined effects of a prolonged drought; habitat destruction, modification and range limitations; and non-native predators, Great Basin redband trout numbers had declined to a point that threatened their continued survival. 7. What was the decision not to list the Great Basin redband trout based on? The main factor in the decision was that
