Teleostei (teleosts) > Salmoniformes
(Salmons) > Salmonidae
(Salmonids) > Salmoninae
Etymology: Oncorhynchus: Greek, onyx, -ychos = nail + Greek, rhyngchos = snout (Ref. 45335).
Environment: milieu / climate zone / depth range / distribution range
Freshwater; demersal. Temperate; 34°N - 33°N
North America: Upper Salt River and Little Colorado River systems (Colorado River drainage) in Arizona, USA.
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 58.0 cm TL male/unsexed; (Ref. 40637); common length : 25.0 cm TL male/unsexed; (Ref. 12193); max. published weight: 2.4 kg (Ref. 40637)
Inhabits clear, cool mountain headwaters and creeks (generally above 2500 m elevation), and mountain lakes. A 95% (stream km) reduction in range has resulted due to hybridization with Oncorhynchus mykiss and competition from Salvelinus fontinalis and Salmo trutta.
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
Reproductive strategy: synchronous ovarian organization, determinate fecundity (Ref. 51846).
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=0.01047 (0.00482 - 0.02276), b=3.04 (2.87 - 3.21), in cm total length, based on LWR estimates for this Genus-body shape (Ref. 93245
Trophic level (Ref. 69278
): 3.8 ±0.4 se; based on size and trophs of closest relatives
Resilience (Ref. 120179
): Low, minimum population doubling time 4.5 - 14 years (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref. 59153
): Moderate vulnerability (43 of 100).