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: Margariscus: Greek, margariskos = pearl (Ref. 45335).
Environment / Climate / Range
Freshwater; demersal. Subtropical; 34°N - 30°N
Length at first maturity / Size / Weight / Age
Maturity: Lm 9.4  range ? - ? cm
Max length : 16.0 cm TL male/unsexed; (Ref. 5723); common length : 9.3 cm TL male/unsexed; (Ref. 12193); max. reported age: 4 years (Ref. 12193)
North America: Atlantic, Hudson Bay, Great Lakes, and Mississippi River basins in southern Canada and northern USA from Atlantic Coast to southern Northwest Territories, eastern British Columbia in Canada and Montana, USA; south to Virginia, Michigan, Wisconsin and Iowa, USA; in upper Missouri River basin.
Adults inhabit pools of creeks and small rivers, also ponds and lakes. They usually occur over sand or gravel. Feed on copepods, cladocerans, chironomids, beetles, filamentous algae, and Chara (Ref. 1998). Spawning occurs during the spring (Ref. 1998).
Spawning occurs in shallow rivers with moderate current, on sand or gravel. Males maintained territories 20.3 cm wide (at least 1.83 m apart from each other). A ripe female is driven onto the territory. The male places his pectoral fin beneath the female's body anteriorly, and his caudal fin placed over the caudal peduncle of the female. The pair vibrates and the eggs are deposited. Females spawn with different males.
Robins, C.R., R.M. Bailey, C.E. Bond, J.R. Brooker, E.A. Lachner, R.N. Lea and W.B. Scott, 1991. Common and scientific names of fishes from the United States and Canada. Am. Fish. Soc. Spec. Pub. (20):183 p. (Ref. 3814)
IUCN Red List Status (Ref. 96402)
CITES (Ref. 94142)
Threat to humans
ReferencesAquacultureAquaculture profileStrainsGeneticsAllele frequenciesHeritabilityDiseasesProcessingMass conversion
Estimates of some properties based on models
Phylogenetic diversity index (Ref. 82805
= 0.7500 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00631 (0.00296 - 0.01347), b=3.05 (2.86 - 3.24), based on LWR estimates for this Subfamily-body shape (Ref. 93245
Trophic Level (Ref. 69278
): 3.1 ±0.36 se; Based on food items.
Resilience (Ref. 69278
): Medium, minimum population doubling time 1.4 - 4.4 years (tm=4).
Vulnerability (Ref. 59153
): Moderate vulnerability (36 of 100) .