Prosopium coulterii, Pygmy whitefish : gamefish

Prosopium coulterii (Eigenmann & Eigenmann, 1892)

Pygmy whitefish
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Image of Prosopium coulterii (Pygmy whitefish)
Prosopium coulterii
Afbeelding van Lyons, J.

Classificatie / Namen Lokale namen | Synoniemen | Catalog of Fishes(Genus, Soort(en)) | ITIS | CoL | WoRMS | Cloffa

> Salmoniformes (Salmons) > Salmonidae (Salmonids) > Coregoninae
Etymology: Prosopium: Greek, prosopon = face (Ref. 45335)coulterii: Named after Dr. J.M. Coulter, a distinguished botanist.
Eponymy: Dr John Merle Coulter (1851–1928) was an American botanist. [...] (Ref. 128868), visit book page.
More on authors: Eigenmann & Eigenmann.

Milieu: milieu / Klimaatzone / Diepte / verspreidingsgebied Ecologie

; zoet water benthopelagisch; potamodroom (Ref. 126106); diepte 18 - 168 m (Ref. 27547), usually 55 - 70 m (Ref. 1998). Temperate; 59°N - 47°N

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North America: three disjunct areas: Lake Superior in Ontario, Canada and Michigan, USA; Yukon River drainage in Yukon, Canada to Columbia River drainage in western Montana and Washington, USA; and Chignik, Naknek and Wood River drainages in southwest Alaska. Europe: Russia (Ref. 26334).

Grootte / Gewicht / Leeftijd

Maturiteit: Lm ?  range ? - ? cm
Max length : 28.0 cm TL mannelijk / geslacht onbekend; (Ref. 5723); common length : 11.5 cm TL mannelijk / geslacht onbekend; (Ref. 12193); max. gerapporteerde leeftijd: 9 Jaren (Ref. 10320)

Korte beschrijving Determinatiesleutels | Morfologie | Morfometrie

Dorsale stekels (totaal) : 0; Dorsale zachte stralen (totaal) : 10 - 13; Anale stekels: 0; Anale zachte stralen: 10 - 14; Wervels: 49 - 55. Body elongate, almost cylindrical. Head elongate, its length slightly greater than body depth; eye relatively large, its diameter greater than snout length; snout bluntly rounded, overhanging mouth, not obviously pointed, a single flap of skin present between nostrils. Nuptial tubercles developed in both males and females, but more conspicuous in males, and occur on top of head, on scales on back and sides, and on paired fins. Body is brownish above, silvery on sides and white below. Dorsal, caudal, and pectoral fins usually clear, anal and pelvic whitish and immaculate, a faint dark spot sometimes present on base of caudal fin. A series of 12 - 14 similar spots present along the midline of the back, and 7 - 14 dark, round or oval parr marks with diffuse borders present along the lateral line of young and sub adults, although some Alaskan forms retain parr marks even on largest fish.
Body shape (shape guide): elongated; Cross section: oval.

Biologie     Verklarende woordenlijst (bv. epibenthic)

Adults inhabit lakes and rivers of mountainous areas (Ref. 1998). They feed mainly on crustaceans and aquatic insect larvae (Ref. 1998). Minimum depth reported from Ref. 1998.

Levenscyclus en paargedrag Maturiteit | Voortplanting | Paaien | Eieren | Fecunditeit | Larven

Moves to spawning grounds in the early winter and presumably back into deeper water after spawning. Spawns at night, presumably the eggs are broadcast, settling into interstices in the gravel. Hatching occurs the following spring (Ref. 27547).

Hoofdreferentie Upload uw referenties | Referenties | Coördinator | Medewerkers

Page, L.M. and B.M. Burr, 1991. A field guide to freshwater fishes of North America north of Mexico. Houghton Mifflin Company, Boston. 432 p. (Ref. 5723)

Status op de Rode Lijst van het IUCN (Ref. 130435: Version 2025-2 (Global))

  Niet bedreigd (LC) ; Date assessed: 18 September 2020

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Gevaar voor de mens

  Harmless





Gebruik door de mens

Visserij: van geen belang; sportvis: ja
FAO - Publication: search | FishSource |

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Schattingen op basis van modellen

Fylogenetische diversiteitsindex
(Ref. 82804)
PD50 = 0.5156 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight a=0.00457 (0.00241 - 0.00868), b=3.14 (2.96 - 3.32), in cm total length, based on LWR estimates for this species & (Sub)family-body (Ref. 93245).
Trofisch niveau
(Ref. 69278)
3.1   ±0.35 se; based on food items.
Generation time 2.0 ( na - na) years. Estimated as median ln(3)/K based on 1 growth studies.
Weerstandsvermogen
(Ref. 120179)
Gemiddeld, minimale populatieverdubbelingstijd 1,4-4,4 jaar (tm=1-2; tmax=9; Fec=103).
Kwetsbaarheid van de visserij
(Ref. 59153)
Low vulnerability (25 of 100). 🛈