Coregonus nasus, Broad whitefish : fisheries, gamefish

Coregonus nasus (Pallas, 1776)

Broad whitefish
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Image of Coregonus nasus (Broad whitefish)
Coregonus nasus
Male Photo von Kline, T.

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> Salmoniformes (Salmons) > Salmonidae (Salmonids) > Coregoninae
Etymology: Coregonus: Greek, kore = pupils of the eye + Greek, gonia = angle (Ref. 45335); nasus: nasus refering to shape of nose (Ref. 1998).
More on author: Pallas.

Umwelt: Milieu / Klimazone / Tiefenbereich / Verbreitungsgebiet Ökologie

; süßwasser; brackwasser pelagic-neritic; anadrom (Ref. 138280). Polar; 73°N - 59°N, 46°E - 102°W

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Eurasia and North America: all drainages of Arctic Ocean from Volonga and Pechora to Alaska.

Länge bei der ersten Reifung / Größe / Gewicht / Alter

Geschlechtsreife: Lm ?  range ? - ? cm
Max length : 71.0 cm TL Männchen/unbestimmt; (Ref. 96339); common length : 46.0 cm TL Männchen/unbestimmt; (Ref. 1998); max. veröff. Gewicht: 16.0 kg (Ref. 1998); max. veröff. Alter: 15 Jahre (Ref. 59043)

Kurzbeschreibung Bestimmungsschlüssel | Morphologie | Morphometrie

Rückenflossenstacheln (insgesamt) : 0; Rückenflossenweichstrahlen (insgesamt) : 10 - 13; Afterflossenstacheln: 0; Afterflossenweichstrahlen: 11 - 14; Wirbelzahl: 60 - 65. Distinguished by its short gill rakers, which are less than one-fifth as long as the interorbital width, and the rounded to flat profile of the head (Ref. 27547). Adipose fin fairly large; axillary process present in the pelvic fins (Ref. 27547). Olive-brown to nearly black on back; sides silvery, often with a gray cast; belly white to yellowish; fins usually rather gray in adults, pale in young (Ref. 27547).
Body shape (shape guide): fusiform / normal.

Biologie     Fachlexikon (Englisch) (z.B. epibenthic)

Nerito-pelagic (Ref. 58426). Adults are found in lowland river and lakes (Ref. 59043) but most frequently in streams (Ref. 5723). Lacustrine and estuarine anadromous forms exist (Ref. 593). Alevins and juveniles feed on zooplankton, adults on benthos, mainly chironomid larvae and molluscs (Ref. 1998, 59043). Males reproduce for the first time in 4-8 years, females at 5-9. Adults start upstream migration in late July - August and reach spawning sites by October - November and spawn in stretches with swift current and sand-pebble bottom, often under ice. Spawning lasts 5-7 days and fish leave spawning site soon after, migrating downstream to overwinter in deeper places of lower stretches of rivers together with older juveniles. In spring, alevins drift from spawning sites downstream with flood-water and forage in floodplain lakes and oxbows where they remain until end of summer before moving to river or reaching maturity (if lakes are large enough and do not dry out). Widely used for aquaculture in eastern Europe (Ref. 59043). Flesh is highly esteemed (Ref. 1998). Sold fresh, dried, or smoked (Ref. 1998).

Lebenszyklus und Paarungsverhalten Geschlechtsreife | Fortpflanzung | Ablaichen | Eier | Fruchtbarkeit | Larven

Mature adults make upstream spawning migrations beginning as early as June and may extend to September or later (Ref. 28214, 28852, 28855, 28857) and move back downstream after spawning and overwinter in deep parts of the rivers or in estuaries (Ref. 27547). Young hatch in the spring and move downward (Ref. 27547).

Hauptreferenz Laden Sie Ihre Referenzen hoch | Referenzen | Koordinator | Partner

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. Publ. (20):183 p. (Ref. 3814)

IUCN Rote Liste Status (Ref. 130435: Version 2025-2 (Global))

  nicht bedroht (LC) ; Date assessed: 22 July 2021

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Bedrohung für Menschen

  Harmless





Nutzung durch Menschen

Fischereien: kommerziell; Sportfisch: ja
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Schätzungen auf der Grundlage von Modellen

Phylogenetischer Diversitätsindex (Ref. 82804):  PD50 = 0.5000   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00537 (0.00470 - 0.00613), b=3.22 (3.18 - 3.26), in cm total length, based on LWR estimates for this species (Ref. 93245).
Trophische Ebene (Ref. 69278):  3.5   ±0.1 se; based on diet studies.
Generation time: 7.8 (5.4 - 8.9) years. Estimated as median ln(3)/K based on 15 growth studies.
Widerstandsfähigkeit (Ref. 120179):  niedrig, Verdopplung der Population dauert 4,5 - 14 Jahre. (K=0.10-0.30; tm=7; tmax=15; Fec=10,000).
Prior r = 0.34, 95% CL = 0.22 - 0.51, Based on 2 data-limited stock assessments.
Anfälligkeit der Fischerei (Ref. 59153):  High vulnerability (65 of 100). 🛈
Preiskategorie (Ref. 80766):   Very high.
Nährstoffe (Ref. 124155):  Calcium = 14 [6, 26] mg/100g; Iron = 0.432 [0.202, 0.855] mg/100g; Protein = 18.1 [17.0, 19.3] %; Omega3 = 0.638 [0.254, 1.755] g/100g; Selenium = 12.1 [4.4, 31.1] μg/100g; VitaminA = 7.15 [1.18, 46.59] μg/100g; Zinc = 0.475 [0.354, 0.695] mg/100g (wet weight);