Environment: milieu / climate zone / depth range / distribution range
Freshwater; demersal. Temperate; 38°N - 32°N
North America: Colorado River drainage from southwestern Wyoming to southern Arizona in the USA.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 56.0 cm TL male/unsexed; (Ref. 5723); common length : 35.0 cm TL male/unsexed; (Ref. 12193); max. published weight: 920.00 g (Ref. 4699)
Adults inhabit rocky pools, runs and riffles of medium to large rivers. Less often found in creeks and small rivers.
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Page, L.M. and B.M. Burr, 1991. A field guide to freshwater fishes of North America north of Mexico. Houghton Mifflin Company, Boston. 432 p. (Ref. 5723)
IUCN Red List Status (Ref. 126983)
Threat to humans
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingNutrientsMass conversion
Estimates based on models
Phylogenetic diversity index (Ref. 82804
= 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01175 (0.00563 - 0.02452), b=3.00 (2.81 - 3.19), in cm total length, based on LWR estimates for this Subfamily-BS (Ref. 93245
Trophic level (Ref. 69278
): 2.8 ±0.2 se; based on size and trophs of closest relatives
Resilience (Ref. 120179
): Medium, minimum population doubling time 1.4 - 4.4 years (K=0.38-0.46).
Fishing Vulnerability (Ref. 59153
): Low to moderate vulnerability (33 of 100).