bio.wikisort.org - Animal

Coregonus widegreni, also called the Valaam whitefish, is a putative species of freshwater whitefish, a part of the common whitefish complex (Coregonus lavaretus sensu lato) from Northern Europe. It is a demersal form of freshwater whitefish that feeds on benthic invertebrates.[2] It spawns in late autumn, and can reach a length of 55 cm maximum.[2] It is characterized by a low gill raker density.[3]

Coregonus widegreni
Conservation status
Data Deficient  (IUCN 3.1)[1]
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Actinopterygii
Order:	Salmoniformes
Family:	Salmonidae
Genus:	Coregonus
Species:	C. widegreni
Binomial name
Coregonus widegreni Malmgren, 1863
Synonyms
Coregonus lavaretus widegreni Malmgren, 1863

In the strict sense the name C. widegreni refers to a population of whitefish that inhabits relatively deep waters (50–150 m) of Lake Ladoga in Northwest Russia.[1] More often the range is thought to comprise coastal areas of the Baltic Sea (except southern section of the Swedish coast) and several larger lakes in Sweden (e.g. Vänern, Vättern) and Northwest Russia (Onega).[2][4] It is one of several types of whitefish co-distributed in Northern Europe and exhibiting different breeding and feeding habits. In the Northern Baltic, C. [lavaretus] widegreni has referred to bottom-feeding whitefish that spawn in the sea ("lesser sparsely-rakered whitefish", in contrast to migratory anadromous whitefish referred to as C. lavaretus lavaretus.[3]

In contemporary Nordic usage, C. widegreni is not recognised as a distinct species, but at most as an ecotype or morphotype of Coregonus lavaretus[3][5] or of Coregonus maraena.[6]

References

На других языках

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- [en] Coregonus widegreni

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[ru] Валаамка

Валаа́мка, сиг валаамский, зобатый сиг (лат. Coregonus widegreni) — вид пресноводных рыб из рода сигов.

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