Coregonus pidschian

Taxonomy

Assessment Information

Geographic Range

Population

Habitat and Ecology

Threats

Conservation Actions

Bibliography

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Taxonomy [top]

Kingdom	Phylum	Class	Order	Family
ANIMALIA	CHORDATA	ACTINOPTERYGII	SALMONIFORMES	SALMONIDAE

Scientific Name:

Coregonus pidschian

Species Authority:

Gmelin, 1789

Common Name/s:

English

–

Bottom Whitefish

Assessment Information [top]

Red List Category & Criteria:

Least Concern ver 3.1

Year Published:

2008

Assessor/s:

Freyhof, J. & Kottelat, M.

Reviewer/s:

Bogutskaya, N., & Smith, K. (IUCN Freshwater Biodiversity Unit)

Justification:
The species is found in the Arctic Ocean basin, from Finland (Lapland) to eastern Siberia, Alaska, Canada eastward to Mackenzie drainage. There no known major threats to the species.

History:

1996

–

Data Deficient

Geographic Range [top]

Range Description:	Arctic Ocean basin, from Finland (Lapland) to eastern Siberia, Alaska, Canada eastward to Mackenzie drainage.
Countries:	Native: Canada; Finland; Norway; Russian Federation; United States
Range Map:	Click here to open the map viewer and explore range.

Population [top]

Population:	No information.
Population Trend:	Unknown

Habitat and Ecology [top]

Habitat and Ecology:	Habitat: Lower reaches of rivers with slow current, large lakes with tributaries, floodplain lakes, deltas and estuaries, brackish waters. Rivers during migration. Biology: Males reproduce for the first time at 4-7 years, females at 5-8. Migratory. In July-August, congregates in large schools and migrates upriver to spawning sites. Lacustrine-riverine stocks enter lake tributaries. Distance of migration varies, commonly not very long. Most individuals spawn annually in August-November, sometimes later, in smaller streams or shallows of larger rivers with heavy current over gravel or stone bottom. Lacustrine stocks not migratory. Female lays only a single portion of eggs. Adults migrate downriver to deeper holes of middle stretches to overwinter. Usually starts downstream migration to feeding areas with ice melting. Feeds mainly on large benthic invertebrates (molluscs, gammarids, mysids, chironomids) and plankton in summer, small fishes and terrestrial insects in autumn.
Systems:	Freshwater

Habitat and Ecology:

Habitat:
Lower reaches of rivers with slow current, large lakes with tributaries, floodplain lakes, deltas and estuaries, brackish waters. Rivers during migration.

Biology:
Males reproduce for the first time at 4-7 years, females at 5-8. Migratory. In July-August, congregates in large schools and migrates upriver to spawning sites. Lacustrine-riverine stocks enter lake tributaries. Distance of migration varies, commonly not very long. Most individuals spawn annually in August-November, sometimes later, in smaller streams or shallows of larger rivers with heavy current over gravel or stone bottom. Lacustrine stocks not migratory. Female lays only a single portion of eggs. Adults migrate downriver to deeper holes of middle stretches to overwinter. Usually starts downstream migration to feeding areas with ice melting. Feeds mainly on large benthic invertebrates (molluscs, gammarids, mysids, chironomids) and plankton in summer, small fishes and terrestrial insects in autumn.

Systems:

Freshwater

Threats [top]

Major Threat(s):	No major threats known.

Major Threat(s):

No major threats known.

Conservation Actions [top]

Conservation Actions:	No information.

Conservation Actions:

No information.

Bibliography [top]

	IUCN. 2008. 2008 IUCN Red List of Threatened Species. Available at: http://www.iucnredlist.org. (Accessed: 5 October 2008). Kaukaranta, M., Koljonen, M.-L., Koskiniemi, J., Pennanen, J. and Tammi, J. 2000. Atlas of Finnish fishes. Riistan - Ja Kalantutkimus, Helsinki. Kottelat, M. and Freyhof, J. 2007. Handbook of European Freshwater Fishes. Publications Kottelat, Cornol, Switzerland. Pravdin, I.F. 1954. [Coregonids in Karelo-Finskoy SSR]. Akademia Nauk SSR, Moskva & Leningrad. Reshetnikov, Y.S. 1980. [Ecology and systematics of the coregonid fishes]. Nauka, Moskva. Shaposhnikova, G.K. 1974. [The "pyzhyan" whitefish [Coregonus lavaretus pidschian] of the Soviet Union].

IUCN. 2008. 2008 IUCN Red List of Threatened Species. Available at: http://www.iucnredlist.org. (Accessed: 5 October 2008).

Kaukaranta, M., Koljonen, M.-L., Koskiniemi, J., Pennanen, J. and Tammi, J. 2000. Atlas of Finnish fishes. Riistan - Ja Kalantutkimus, Helsinki.

Kottelat, M. and Freyhof, J. 2007. Handbook of European Freshwater Fishes. Publications Kottelat, Cornol, Switzerland.

Pravdin, I.F. 1954. [Coregonids in Karelo-Finskoy SSR]. Akademia Nauk SSR, Moskva & Leningrad.

Reshetnikov, Y.S. 1980. [Ecology and systematics of the coregonid fishes]. Nauka, Moskva.

Shaposhnikova, G.K. 1974. [The "pyzhyan" whitefish [Coregonus lavaretus pidschian] of the Soviet Union].

Citation:	Freyhof, J. & Kottelat, M. 2008. Coregonus pidschian. In: IUCN 2011. IUCN Red List of Threatened Species. Version 2011.2. <www.iucnredlist.org>. Downloaded on 25 May 2012.
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