STATUS: Endangered without critical habitat.|
DESCRIPTION: Bull trout is olive green overall with yellow spots on its back, the bull trout has sides flecked wth red speckles. Its fins, trimmed with a white or cream-colored leading edge, are devoid of spots, although a few yellow spots daub the tailfin. It has no wavy line on the fins and back like the brook trout. Usually does not exceed 30.5 cm in length.
HABITAT: They can live in either lakes or rivers and streams, but only in the icy cold, pure waters associated with springs and glaciers. Spawning adults migrate upstream to reach shallow runs or poools with gravel bottoms.
Present: Found in many large river systems of he western United States and Canada.
THREATS AND/OR REASONS FOR DECLINE: Dam construction; introduction of nonnative trout.
Historic: In California it was limited to the lower McCloud River in Shasta and Siskiyou counties. The last of this population is believed to have disappeared during the 1970s.
OTHER INFORMATION: The fish spawn in September. After the eggs are hatched the juveniles drift downstream, where they grow to adult size. Bull trout are opportunistic feeders that feed on anything even their own species for food.
Life on the Edge. Biosystems Books 1994. Santa Cruz, California