Stenodus leucichthys, Sheefish : fisheries, aquaculture, gamefish

Stenodus leucichthys (Güldenstädt, 1772)

Sheefish
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Stenodus leucichthys
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> Salmoniformes (Salmons) > Salmonidae (Salmonids) > Coregoninae
Etymology: Stenodus: Greek, stenos = narrow + Greek, odous = teeth (Ref. 45335); leucichthys: leucichthys meaning white fish (Ref. 1998).

Taxonomic Remarks
Stenodus nelma (Pallas, 1773) is a valid species according to Kottelat and Freyhof (2007: Ref. 82592). The corresponding species summary page will be created in the future.

Umwelt: Milieu / Klimazone / Tiefenbereich / Verbreitungsgebiet Ökologie

seewasser; süßwasser; brackwasser demersal; anadrom (Ref. 138280); tiefenbereich 10 - ? m (Ref. 4779). Boreal; 73°N - 58°N, 36°E - 111°W

Verbreitung Territorien | FAO Gebiete | Ökosysteme | Vorkommen | Punkt Karte | Einführungen | Faunafri

North America: Arctic drainages from Anderson River in Northwest Territories, Canada to Kuskokwim River (Bering Sea tributary) in Alaska. Upstream in Mackenzie River and Yukon River drainages to British Columbia, Canada (Ref. 5723). Eurasia: Caspian Sea (common in central and southern Caspian in summer), Volga, Ural and Terak drainages (Ref. 59043). Hybridization with Coregonus nelsoni, Coregonus autumnalis and Coregonus muksun are due more to the broadcasting of eggs and sperm rather than pairing between species or genera (Ref. 27547).

Länge bei der ersten Reifung / Größe / Gewicht / Alter

Geschlechtsreife: Lm 72.5, range 70 - 75 cm
Max length : 150 cm TL Männchen/unbestimmt; (Ref. 4574); common length : 61.0 cm TL Männchen/unbestimmt; (Ref. 12193); max. veröff. Gewicht: 40.0 kg (Ref. 10318); max. veröff. Alter: 22 Jahre (Ref. 4576)

Kurzbeschreibung Bestimmungsschlüssel | Morphologie | Morphometrie

Rückenflossenstacheln (insgesamt) : 0; Rückenflossenweichstrahlen (insgesamt) : 11 - 19; Afterflossenstacheln: 0; Afterflossenweichstrahlen: 14 - 19; Wirbelzahl: 63 - 69. Distinguished by its large mouth, the protruding lower jaw, and the presence of only 13 to 17 gill rakers on the lower limb of the first gill arch (Ref. 27547). Dorsal fin high and pointed; pelvic fins with well developed axillary process (Ref. 27547). Generally silvery, with the back usually rather green, blue or pale brown; silvery white below; dorsal and caudal fins have dusky margins, other fins pale (Ref. 27547).
Body shape (shape guide): fusiform / normal.

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

Nerito-pelagic (Ref. 58426). Adults occur in coastal brackish waters near mouths of rivers, but usually in rivers or some land-locked lakes (Ref. 4779). At the sea, they are found throughout basin in pelagic zone with temperatures below 18° C and 20-50 m deep (Ref. 59043). Juveniles and adults overwinter and forage at the sea. Encountered in large lowland rivers during migration (Ref. 59043). Adults feed mostly on small fishes; young eat aquatic insect larvae and planktonic crustaceans (Ref. 4779). During spawning migration, it feeds little if at all (Ref. 27547). Mature individuals spawn on gravel shallows (Ref. 59043). Flesh is white, sweet and slightly oily (Ref. 27547). Sold fresh or frozen.

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

Upstream migration from wintering areas begins at ice break-up. Early upstream movement may be associated with feeding, but movement soon becomes a definite migration to the spawning area. Spawning begins at dusk, and continuing well into the night. A female accompanied by a male, swims to the surface near the upstream end of the spawning ground. She rapidly moves across the current, extruding her eggs. The male, stays below the female so that as the eggs sink, sperm released, fertilizes the eggs. After completing a spawning pass, the female drifts downstream. She may repeat the spawning act over the downstream portion of the spawning area or may move upstream to the head of the grounds before releasing more eggs. Following spawning, there is a fairly rapid downstream migration to wintering grounds (Ref. 27547). It is not certain if spawning occurs annually or at longer intervals (Ref. 27547). Russian fish appear to spawn only every third or fourth year (Ref. 28219). Spawning frequency at Selawik, Alaska may be every other year (Ref. 27547).

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Svetovidov, A.N., 1984. Salmonidae. p. 373-385. In P.J.P. Whitehead, M.-L. Bauchot, J.-C. Hureau, J. Nielsen and E. Tortonese (eds.) Fishes of the north-eastern Atlantic and the Mediterranean. UNESCO, Paris. vol. 1. (Ref. 4779)

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

  Gefährdung zunehmend (NT) (C2a(ii)); Date assessed: 18 October 2023

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

Bedrohung für Menschen

  Harmless





Nutzung durch Menschen

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

Phylogenetischer Diversitätsindex (Ref. 82804):  PD50 = 0.7500   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00479 (0.00394 - 0.00581), b=3.18 (3.13 - 3.23), in cm total length, based on LWR estimates for this species (Ref. 93245).
Trophische Ebene (Ref. 69278):  4.1   ±0.74 se; based on food items.
Generation time: 14.7 (8.1 - 19.6) years. Estimated as median ln(3)/K based on 10 growth studies.
Widerstandsfähigkeit (Ref. 120179):  niedrig, Verdopplung der Population dauert 4,5 - 14 Jahre. (K=0.05-0.10; tm=5-12; tmax=22; Fec=80,000).
Prior r = 0.42, 95% CL = 0.28 - 0.63, Based on 2 data-limited stock assessments.
Anfälligkeit der Fischerei (Ref. 59153):  High to very high vulnerability (74 of 100). 🛈
Preiskategorie (Ref. 80766):   Very high.
Nährstoffe (Ref. 124155):  Calcium = 10.3 [5.6, 24.2] mg/100g; Iron = 0.409 [0.208, 0.798] mg/100g; Protein = 18.8 [17.2, 20.2] %; Omega3 = 0.565 [0.227, 1.537] g/100g; Selenium = 17.9 [7.4, 43.7] μg/100g; VitaminA = 8.75 [1.47, 53.62] μg/100g; Zinc = 0.304 [0.204, 0.438] mg/100g (wet weight); based on nutrient studies.