United States (contiguous states) country information

Common names: Bonytail
Occurrence: native
Salinity: freshwater
Abundance: scarce (very unlikely) | Ref: Page, L.M. and B.M. Burr, 1991
Importance: | Ref:
Aquaculture: experimental | Ref: Sowka, P.A. and P.E. Brunkow, 1999
Regulations: protected | Ref:
Uses: no uses
Comments: Extremely rare (Ref. 86798). Extant only in Green River, Utah and perhaps in some large impoundments of the Colorado River (Ref. 5723). Several factors contributed to the decline of bonytail populations in the Colorado River. These include habitat alteration produced by reservoir construction and predation by introduced species (Ref. 41720). Little recruitment has been observed for over 30 years (Ref. 41720). Also Ref. 3814. Status of threat: endangered; status same as 1989. Criteria: 1,3, 4 (http://fisc.er.usgs.gov/afs/) (Ref. 81264).
National Checklist:
Country Information: https://www.cia.gov/library/publications/resources/the-world-factbook/geos/us.html
National Fisheries Authority: http://www.nmfs.gov
Occurrences: Occurrences Point map
Main Ref: Page, L.M. and B.M. Burr, 2011
National Database:

Common names from other countries

Bonytail Chub, Carpa elegante, Gila zdobená, ... more

Classification / Names Common names | Synonyms | Catalog of Fishes(genus, species) | ITIS | CoL | WoRMS | Cloffa

Teleostei (teleosts) > Cypriniformes (Carps) > Leuciscidae (Minnows) > Laviniinae
Etymology: Gila: A river flowing from SW Mejico to south Arizona.
More on authors: Baird & Girard.

Environment: milieu / climate zone / depth range / distribution range Ecology

Freshwater; benthopelagic; potamodromous (Ref. 51243). Temperate; 42°N - 32°N

Distribution Countries | FAO areas | Ecosystems | Occurrences | Point map | Introductions | Faunafri

North America: Colorado River drainage in Wyoming, Colorado, Utah, New Mexico, Arizona and California in USA; and Mexico.

Size / Weight / Age

Maturity: L_m ? range ? - ? cm
Max length : 62.0 cm TL male/unsexed; (Ref. 5723)

Short description Morphology | Morphometrics

Gila elegans can be distinguished from similar species Gila cypha by having terminal mouth, angle along anal fin base continues well above caudal fin, more slender caudal peduncle, smaller hump on nape, usually dorsal fin with 10 rays; and 75-99 scales on lateral line. Breeding males with red lower side and pectoral and anal-fin bases (Ref. 86798).

Inhabits flowing pools and backwaters, usually over mud or rock. Streamlined body may suggest occasional occurrence in swift runs (Ref. 86798).

Life cycle and mating behavior Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae

Main reference Upload your references | References | Coordinator | Collaborators

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)

Critically Endangered (CR) (B1ab(v)+2ab(v); C2a(i)); Date assessed: 08 February 2012

CITES (Ref. 128078)

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

Harmless

Human uses

FAO(Publication : search) | FishSource |

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Estimates based on models

Phylogenetic diversity index (Ref. 82804): PD₅₀ = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].

Bayesian length-weight: a=0.01148 (0.00455 - 0.02896), b=3.03 (2.81 - 3.25), in cm Total Length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).

Trophic level (Ref. 69278): 2.0 ±0.2 se; based on size and trophs of closest relatives

Resilience (Ref. 120179): Very Low, minimum population doubling time more than 14 years (Preliminary K or Fecundity.).

Fishing Vulnerability (Ref. 59153): Moderate vulnerability (45 of 100).

Gila elegans Baird & Girard, 1853