Environment: milieu / climate zone / depth range / distribution range
Ecologia
; acqua dolce demersale; potamodromo (Ref. 51243). Temperate; 42°N - 31°N
North America: Colorado River drainage in USA (Wyoming, Colorado, Utah, New Mexico, Arizona, Nevada and California) and Mexico. Now mostly restricted to Utah and Colorado; and extirpated from the southern portion of the range by the construction of large dams.
Size / Peso / Age
Maturity: Lm ? range ? - ? cm
Max length : 180 cm TL maschio/sesso non determinato; (Ref. 5723); common length : 52.5 cm TL maschio/sesso non determinato; (Ref. 12193); Età massima riportata: 12 anni (Ref. 12193)
Short description
Chiavi di identificazione | Morfologia | Morfometria
Raggi anali molli: 9. Scales very small with 76-97, usually 80-87 scales on lateral line and 18-23 scales above lateral line; dorsal fin usually with 9 rays; anal fin with 9 rays (Ref. 86798).
Inhabits pools of medium to large rivers. Large individuals usually occur in deep, flowing rocky or sandy pools (Ref. 86798).
Life cycle and mating behavior
Maturities | Riproduzione | Spawnings | Egg(s) | Fecundities | Larve
Page, L.M. and B.M. Burr, 2011. A field guide to freshwater fishes of North America north of Mexico. Boston : Houghton Mifflin Harcourt, 663p. (Ref. 86798)
IUCN Red List Status (Ref. 130435)
Threat to humans
Harmless
Human uses
Strumenti
Special reports
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Fonti Internet
Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5625 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00389 (0.00180 - 0.00842), b=3.12 (2.94 - 3.30), in cm total length, based on all LWR estimates for this body shape (Ref.
93245).
Trophic level (Ref.
69278): 2.0 ±0.2 se; based on size and trophs of closest relatives
Resilienza (Ref.
120179): Basso, tempo minimo di raddoppiamento della popolazione 4.5 - 14 anni (tmax=12).
Fishing Vulnerability (Ref.
59153): Very high vulnerability (90 of 100).
