Classification / Names
Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa
Actinopterygii (ray-finned fishes) > Cypriniformes
(Carps) > Cyprinidae
(Minnows or carps) > Leuciscinae
Etymology: Gila: A river flowing from SW Mejico to south Arizona.
Environment / Climate / Range
Freshwater; benthopelagic. Subtropical; 33°N - 30°N
Size / Weight / Age
Maturity: Lm ?  range ? - ? cm
Max length : 24.0 cm TL male/unsexed; (Ref. 86798)
Morphology | Morphometrics
soft rays: 8. Gila nigrescens can be distinguished by the following characters: lateral line with 67-78 scales; dorsal fin with 9 rays; anal fin with 8 rays; 1st gill arch with 9014 rakers; pharyngeal teeth 2,5-4,2; deep, compressed body; long, fairly slender caudal peduncle; terminal mouth on rounded snout; olive-gray above; silver side; clear to slate gray fins; and breeding individuals with red-orange mouth and paired and anal-fin bases (Ref. 86798).
North America: Mimbres River in New Mexico, USA; Lagunas Guzman and Bustillos, Chihuahua in Mexico.
Inhabits flowing pools of creeks and small rivers, usually near brush or other cover (Ref. 86798).
Life cycle and mating behavior
Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae
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. 96402)
CITES (Ref. 94142)
Threat to humans
Common namesSynonymsMetabolismPredatorsEcotoxicologyReproductionMaturitySpawningFecundityEggsEgg development
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingMass conversion
Estimates of some properties based on models
Phylogenetic diversity index (Ref. 82805
= 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00813 (0.00386 - 0.01712), b=3.13 (2.96 - 3.30), based on LWR estimates for this (Sub)family-body shape (Ref. 93245
Trophic Level (Ref. 69278
): 3.0 ±0.2 se; Based on size and trophs of closest relatives
Resilience (Ref. 69278
): Medium, minimum population doubling time 1.4 - 4.4 years (Preliminary K or Fecundity.).
Vulnerability (Ref. 59153
): Low to moderate vulnerability (32 of 100) .