ScoreU - Unknown
ScoreE - 5,000-20,000 km squared (about 2,000-8,000 square miles)
Comment5000-20,000km (2,000-8,000square miles)
Area of Occupancy
Comment40-200 km (25-125 miles) linear river
Length of Occupancy
ScoreLC - 40-200 km (about 25-125 miles)
ScoreE - Relatively Stable (±25% change)
CommentSiltation and stream temperature increases with loss of riparian shading and lower snowpack probably contributed to some decline
ScoreE - Stable. Population, range, area occupied, and/or number or condition of occurrences unchanged or remaining within ±10% fluctuation
ScoreG - Slightly threatened. Threats, while recognizable, are of low severity, or affecting only a small portion of the population or area.
CommentClimate Change, increasing stream temperatures and lower snowpack could seriously impact the habitat that this speces exists in
SeverityLow - Low but nontrivial reduction of species population or reversible degradation or reduction of habitat in area affected, with recovery expected in 10-50 years.
ScopeLow - 5-20% of total population or area affected
ImmediacyLow - Threat is likely to be operational within 5-20 years.
CommentThreat is not fully operational now, but some areas have been lost.
ScoreC - Not Intrinsically Vulnerable. Species matures quickly, reproduces frequently, and/or has high fecundity such that populations recover quickly (< 5 years or 2 generations) from decreases in abundance; or species has high dispersal capability such that extirpated populations soon become reestablished through natural recolonization (unaided by humans).
ScoreB - Narrow. Specialist. Specific habitat(s) or other abiotic and/or biotic factors (see above) are used or required by the Element, but these key requirements are common and within the generalized range of the species within the area of interest.
CommentCold water stenotherm, cannot survive increases in water temperatures or will have to migrart to cooler temps