More info | Plus d'info | Mais info | Fishwatchers: Add your observation | Attach your web site to this page | FishBase

English | Español | Português | Français | Deutsch | Italiano | Nederlands | Chinese      More languages...

Coregonus pidschian in Finland
Humpback whitefish

Go to Species Summary

Coregonus pidschian   (Gmelin, 1789)
Family:	Salmonidae (Salmonids) , subfamily: Coregoninae			picture (Copid_u0.jpg) by Kline, T.
Order:	Salmoniformes  (salmons)
Class:	Actinopterygii (ray-finned fishes)
FishBase name:	Humpback whitefish
Max. size:	46.0 cm TL (male/unsexed; Ref. 5723); max. reported age: 14 years
Environment:	demersal; anadromous
Climate:	polar; 71°N - 61°N
Global Importance:	fisheries: commercial; aquaculture: commercial
Resilience:	Low, minimum population doubling time 4.5 - 14 years (tm=3-14; tmax=14; Fec=8,000)
Distribution:	Arctic: Sweden and Finland to the extreme northeast of Siberia, in the western portion of the Bering Sea basin, and partly in the basin of the Sea of Okhotsk. In Alaska in the tributaries of the Beaufort, Chukchi, and Bering seas (Ref. 5723). Additional populations in Poland and in the Alps (Ref. 683). Appendix III of the Bern Convention (protected fauna). Belongs to Coregonus clupeaformis complex (Ref. 27547).
Diagnosis:	Dorsal spines (total): 0-0; Dorsal soft rays (total): 11-13; Anal spines: 0-0; Anal soft rays: 10-14; Vertebrae: 58-63. 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).
Biology:	Inhabits coastal waters near shore (Ref. 5723). 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)
Threatened:	, (Ref. 36508)
Dangerous:	harmless
Coordinator:
Main Ref:	Kottelat, M.. 1997. (Ref. 13696)
Update | Add

Finland country information
Common names:	Pohjasiika		Ref:  Blanc, M., J.-L. Gaudet, P. Banarescu and J.-C. Hureau, 1971
Status:	native		Ref:  Kallio-Nyberg, I. and M.-L. Koljonen, 1990
Salinity:	freshwater, brackish
Importance:	subsistence fisheries		Ref:
Aquaculture:	commercial		Ref:
Uses:	no uses
Comments:	Occurs in lakes in northern Finland and Kuusamo. Also Ref. 6114, 6320.
Country Information:	www.cia.gov/cia/publications/factbook/geos/fi.html
Occurrences:	Occurrences    Point map
Main Ref:	Koli, L., 1990
Update

More information:	Countries FAO areas Occurrences Introductions Ecosystem Ecology Diet Food items Food consumption Ration Predators Ciguatera Fish loss Common names Synonyms Pictures Sounds Reproduction Maturity Spawning Eggs Egg dev. Larvae Larval dynamics References Growth L-W relationship L-L relationship Length frequencies Recruitment Max. age & size Metabolism Morphology Morphometrics Gill area Brains Vision Collaborators Genetics Allele frequencies Heritability Strains Aquaculture Aquaculture profile Diseases Ecotoxicology Processing Speed Swim. type Stamps
	Note: No data are available if label is black .
Tools:	Biogeographic modelling | E-book | Field guide | Length-frequency Wizard | Life-history tool | Point map |
Internet sources:	BiOSC Point Data | CISTI | Google | GOBASE | GenBank ( genome, nucleotide ) | National databases | PubMed | Scirus | Tree of Life | Zoological Record Other web sites |
	Note: use the Back button of your browser to return to FishBase.
	Modified:  Kuosmanen-Postila, Sari	Entered:  Reyes, Rodolfo B.

	Ref.:				Glossary
		(e.g. 9948)				(e.g. cephalopods)
ThisFishForum      Comments & Corrections      Sign our Guest Book
Back to Search

CGNET - US

Page created by: Eli, 20.10.03, last modified by Eli, 26.06.07