Environment: milieu / climate zone / depth range / distribution range
Ecologie
; zoet water demersaal; potamodroom (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.
Grootte / Gewicht / Leeftijd
Maturity: Lm ? range ? - ? cm
Max length : 180 cm TL mannelijk / geslacht onbekend; (Ref. 5723); common length : 52.5 cm TL mannelijk / geslacht onbekend; (Ref. 12193); max. gerapporteerde leeftijd: 12 Jaren (Ref. 12193)
Korte beschrijving
Determinatiesleutels | Morfologie | Morfometrie
Anale zachte stralen: 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).
Levenscyclus en paargedrag
Maturities | Voortplanting | Spawnings | Egg(s) | Fecundities | Larven
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)
Status op de Rode Lijst van het IUCN (Ref. 130435)
Gevaar voor de mens
Harmless
Gebruik door de mens
Tools
Speciale rapporten
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Internetbronnen
Estimates based on models
Fylogenetische diversiteitsindex (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).
Trofisch niveau (Ref.
69278): 2.0 ±0.2 se; based on size and trophs of closest relatives
Weerstandsvermogen (Ref.
120179): laag, minimale populatieverdubbelingstijd 4,5-14 jaar (tmax=12).
Fishing Vulnerability (Ref.
59153): Very high vulnerability (90 of 100).
