Teleostei (teleosts) >
Cypriniformes (Carps) >
Catostomidae (Suckers) > Catostominae
Etymology: Xyrauchen: Greek, xyreo = that cuts like a knife + Greek, auchen = neck (Ref. 45335).
Environment: milieu / climate zone / depth range / distribution range
Ecology
Freshwater; demersal; potamodromous (Ref. 51243). Temperate; 37°N - 34°N
North America: Formerly throughout medium to large rivers of Colorado River basin from Wyoming and Colorado in USA to Baja California in Mexico. Presently known only above Grand Canyon and in Lakes Mead, Mohave and Havasu on lower Colorado River in USA.
Size / Weight / Age
Maturity: Lm ? range ? - ? cm
Max length : 91.0 cm TL male/unsexed; (Ref. 5723); common length : 50.0 cm TL male/unsexed; (Ref. 12193)
Occurs in silt-bottomed to rock-bottomed backwaters near strong current and deep pools in medium to large rivers, and impoundments.
Life cycle and mating behavior
Maturities | Reproduction | Spawnings | Egg(s) | Fecundities | 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. 130435)
Threat to humans
Harmless
Human uses
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Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 1.0000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00501 (0.00202 - 0.01242), b=3.09 (2.87 - 3.31), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
Trophic level (Ref.
69278): 3.1 ±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): High vulnerability (56 of 100).
