Classification / Names
Common names | Synonyms | Catalog of Fishes(genus, species) | ITIS | CoL | WoRMS | Cloffa
Teleostei (teleosts) >
Cypriniformes (Carps) >
Leuciscidae (Minnows) > Plagopterinae
Etymology: Margariscus: Greek, margariskos = pearl (Ref. 45335).
Eponymy: Henry Francis Nachtrieb (1859–1942) was state zoologist of Minnesota, USA. [...] (Ref. 128868), visit book page.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Freshwater; benthopelagic. Temperate
North America: Atlantic, Hudson Bay, Great Lakes, and Mississippi River basins in south Canada and north USA from Atlantic Coast to south Northwest Territories, east British Columbia, and Montana; south to New York, Wisconsin and Iowa. Isolated population in upper Missouri River basin in South Dakota, Nebraska and Wyoming.
Size / Weight / Age
Maturity: Lm ? range ? - ? cm
Max length : 16.0 cm TL male/unsexed; (Ref. 86798)
Short description
Identification keys | Morphology | Morphometrics
Dorsal soft rays (total): 8; Anal soft rays: 8. <>Margariscus nachtriebi can be distinguished by the possession of the following characters: usually complete lateral line; 60-75 small lateral scales; short head; fairly deep caudal peduncle; flaplike barbel in groove above mouth (often missing on 1 or both side); almost cylindrical body; rounded snout; small, slightly subterminal mouth (seldom reaching front of eye); origin of dorsal fin behind origin of pelvic fin; 8 dorsal rays; 8 anal rays; and pharyngeal teeth 2,5-4,2. Body dark olive gray above, often with black herringbone lines, dark stripe along back; many small black and brown specks (absent in western populations) on silver side; white, yellow or red below; black stripe along side, black caudal spot on young; stripe vague on adult. Breeding male has bright orange-red lower side, pale yellow stripe along belly and many small tubercles on head (Ref. 86798).
Inhabits pools of creeks and small rivers, ponds and lakes. Usually found over sand or gravel (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. 130435: Version 2024-1)
Threat to humans
Harmless
Human uses
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Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.7500 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01000 (0.00244 - 0.04107), b=3.04 (2.81 - 3.27), in cm total length, based on all LWR estimates for this body shape (Ref.
93245).
Trophic level (Ref.
69278): 3.3 ±0.5 se; based on size and trophs of closest relatives
Resilience (Ref.
120179): Medium, minimum population doubling time 1.4 - 4.4 years (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
