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Diagnostic Description

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Distinguished by the gill rakers that are longer than 20% of the interorbital width, 19 to 25 gill rakers (with modal counts of 22 or 23), and a pronounced hump behind the head in adults (Ref. 27547). Adipose fin well developed, often larger in males; axillary process present in pelvic fins (Ref. 27547). Dark brown to midnight blue above fading to silver on sides and wide beneath; no parr marks in young (Ref. 27547).
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Recorder
Cristina V. Garilao
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Life Cycle

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Upstream spawning migrations may be extensive but some populations seldom venture far upstream and still others may never go to sea at all (Ref. 593). Mature adults migrate upstream as early as June to spawn in October. It is assumed that the young hatch in late winter and spring, subsequently moving downstream, to return as mature adults 4 to 6 years later (Ref. 27547).
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Armi G. Torres
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Migration

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Anadromous. Fish that ascend rivers to spawn, as salmon and hilsa do. Sub-division of diadromous. Migrations should be cyclical and predictable and cover more than 100 km.
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Rainer Froese
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Morphology

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Dorsal spines (total): 0; Dorsal soft rays (total): 11 - 13; Analspines: 0; Analsoft rays: 10 - 14; Vertebrae: 58 - 63
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Cristina V. Garilao
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Trophic Strategy

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Feeds on worms, mollusks and crustaceans.
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Peter N. Yershov
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Biology

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Inhabits coastal waters near shore (Ref. 5723), lower reaches of rivers with slow current, large lakes with tributaries, floodplain lakes, deltas and estuaries, brackish waters (Ref. 59043). Migrates up to more than 1,200 km inland for spawning (Ref. 5723). Overwinters near river mouths (Ref. 5723). There are non-migratory freshwater populations. Adults feed mostly on mollusks, crustaceans and chironomid larvae (Ref. 28219).
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Rainer Froese
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Importance

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fisheries: commercial; aquaculture: commercial
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Rainer Froese
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Humpback whitefish

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The humpback whitefish (Coregonus pidschian),[2] also referred to as the bottom whitefish,[2][3] the Arctic whitefish[4] or the pidschian,[4] is a species of freshwater whitefish with a northern distribution. It is one of the members in the broader common whitefish complex, or the Coregonus clupeaformis complex.[2] This fish lives in estuaries and brackish water near river mouths, in deltas and in slowly running rivers, in large lakes with tributaries, and floodplain lakes.[2][3] It can migrate long distances upriver for spawning.

The distribution of Coregonus pidschian is in the Arctic basin, ranging from Northern Norway and Finland across the Russian coast to Alaska and up to the Mackenzie River drainage in North-West Canada.[3] It is also found in the Okhotsk Sea basin.[5]

References

  1. ^ Freyhof, J. & Kottelat, M. (2008). "Coregonus pidschian". IUCN Red List of Threatened Species. 2008: e.T5375A11125375. doi:10.2305/IUCN.UK.2008.RLTS.T5375A11125375.en.
  2. ^ a b c d Froese, Rainer and Pauly, Daniel, eds. (2010). "Coregonus pidschian" in FishBase. February 2010 version.
  3. ^ a b c Freyhof, J. & Kottelat, M. 2008. Coregonus pidschian. In: IUCN 2011. IUCN Red List of Threatened Species. Version 2011.1. Downloaded on 26 August 2011.
  4. ^ a b Kottelat, M. and Freyhof, J. 2007. Handbook of European Freshwater Fishes. Publications Kottelat, Cornol, Switzerland.
  5. ^ Пыжьян Red Book of the Kamchatka Krai.
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Humpback whitefish: Brief Summary

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The humpback whitefish (Coregonus pidschian), also referred to as the bottom whitefish, the Arctic whitefish or the pidschian, is a species of freshwater whitefish with a northern distribution. It is one of the members in the broader common whitefish complex, or the Coregonus clupeaformis complex. This fish lives in estuaries and brackish water near river mouths, in deltas and in slowly running rivers, in large lakes with tributaries, and floodplain lakes. It can migrate long distances upriver for spawning.

The distribution of Coregonus pidschian is in the Arctic basin, ranging from Northern Norway and Finland across the Russian coast to Alaska and up to the Mackenzie River drainage in North-West Canada. It is also found in the Okhotsk Sea basin.

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