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Rhinichthys atratulus (Hermann, 1804)

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

Teleostei (teleosts) > Cypriniformes (Carps) > Leuciscidae (Minnows) > Pogonichthyinae
Etymology: Rhinichthys: Greek, rhinos = nose + Greek, ichthys = fish (Ref. 45335);  atratulus: From the word atratus, meaning clothed in black (Ref. 10294).

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

Freshwater; demersal. Temperate; 0°C - 29°C (Ref. 35682); 57°N - 34°N

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

North America: Atlantic, Great Lakes, Hudson Bay, Mississippi River, and upper Mobile Bay drainages Nova Scotia to Manitoba, Canada and south to northern Georgia and northern Alabama, USA.

Size / Weight / Age

Maturity: Lm ?  range ? - ? cm
Max length : 12.4 cm TL male/unsexed; (Ref. 10294); common length : 5.7 cm TL male/unsexed; (Ref. 12193); max. reported age: 3.00 years (Ref. 12193)

Short description Identification keys | Morphology | Morphometrics

Dorsal soft rays (total): 8; Anal soft rays: 7. Rhinichthys atratulus can be diagnosed by the following characters: back and side with many brown-black specks; deep caudal peduncle; barbel in corner of mouth; groove separating snout from upper lip absent; pointed snout slightly overhangs mouth; 53-70 scales on lateral line; 7 anal rays; pharyngeal teeth 2,4-4,2. Body light brown above, black spot followed by silver spot on dorsal fin base; black stripe along side, through eye and onto snout, continuous in young, as blotches in adult; often a silver stripe above black stripe; and silver white below. Breeding male can be distinguished by having pads on upper surface of pectoral fin, yellow-white pectoral and pelvic fins, white to red stripe below black body stripe (Ref. 86798). Body stout, spindle-shaped; mouth slightly inferior, slightly oblique and extending to below nostril; pointed barbel in groove at angle of mouth. Gill rakers short, conical, widely spaced (Ref. 54725).

Biology     Glossary (e.g. epibenthic)

Inhabits rocky runs and pools of headwaters, creeks and small rivers (Ref. 5723, 10294, 86798). Feeds on aquatic insects (Ref. 54729, 10294), diatoms and other algae (Ref. 54725). Considered as an attractive aquarium pet and propagation through artificial fertilization is practical (Ref. 54725).

Life cycle and mating behavior Maturities | Reproduction | Spawnings | Egg(s) | Fecundities | 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)

  Least Concern (LC) ; Date assessed: 01 March 2012

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Threat to humans

  Harmless





Human uses

FAO - Publication: search | FishSource |

More information

Trophic ecology
Food items
Diet compositions
Food consumptions
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Ecology
Ecology
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Max. ages / sizes
Length-weight rel.
Length-length rel.
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Mass conversions
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Distribution
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Physiology
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Visual pigment(s)
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Diseases / Parasites
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Genetics
Genetics
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Stamps, coins, misc.
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References

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Internet sources

AFORO (otoliths) | Alien/Invasive Species database | Aquatic Commons | BHL | Cloffa | BOLDSystems | Websites from users | Check FishWatcher | CISTI | Catalog of Fishes: genus, species | DiscoverLife | ECOTOX | FAO - Publication: search | Faunafri | Fishipedia | Fishtrace | GenBank: genome, nucleotide | GloBI | Google Books | Google Scholar | Google | IGFA World Record | MitoFish | Otolith Atlas of Taiwan Fishes | PubMed | Reef Life Survey | Socotra Atlas | Tree of Life | Wikipedia: Go, Search | World Records Freshwater Fishing | Zoological Record

Estimates based on models

Phylogenetic diversity index (Ref. 82804):  PD50 = 0.5020   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00851 (0.00376 - 0.01926), b=3.06 (2.86 - 3.26), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
Trophic level (Ref. 69278):  3.1   ±0.39 se; based on food items.
Resilience (Ref. 120179):  High, minimum population doubling time less than 15 months (tmax=3).
Fishing Vulnerability (Ref. 59153):  Low vulnerability (10 of 100).