Valaam whitefish (Coregonus widegreni) fish species and information / pictures of Valaam whitefish - Coregonus widegreni

Valaam whitefish (Coregonus widegreni) fish species information

Scientific Name
Coregonus widegreni

Common Name
Valaam whitefish

Biology
Recorded from coastal waters at sea. Lacustrine, at depths greater than 30 m, in Lake Ladoga commonly at 50-150 m (Ref. 59043). Specimens measuring 36-40 cm are more than 5 years old. Spawns for the first time at 4-6 years (Ref. 59043). Spawns from the end of November to 20 December (Ref. 593). Oviparous (Ref. 205). Eggs are buried in unguarded nests (Ref. 205). Feeds on benthic invertebrates, especially gammarids, molluscs and insect larvae (Ref. 59043).

Classification

Classified By

Malmgren, 1863

Class

Ray-finned fishes (Actinopterygii)

Order

Salmons (Salmoniformes)

Family

Salmonids (Salmonidae)

Distribution

Region

Europe

Distribution

Europe: Baltic: Bothnian Gulf, Gotland (missing along Swedish coast southward of Stockholm); southern Baltic: from Germany to Gulf of Finland; several landlocked populations in Sweden (Lakes V?nern, V?ttern, Locknesj?n, Storvindeln, Storlaisan, Skalka-Parkijaur, Arjeplog) and Russia (Neva drainage, Lakes Ladoga and Onega).

Range

Unknown

Environment

Climate

Temperate

Water Temperature From

Unknown °C

Water Temperature To

Unknown °C

Depth From - meters

30 m

Depth To - meters

150 m

Zone

demersal

Environment

Freshwater; demersal; depth range 30 - 150 m (Ref. 59043)

Trophic Level

3.34 s.e. 0.45 Based on size and trophs of closest relatives

Occurs in Marine / Salt water

False

Occurs in Brackish water

False

Occurs in Fresh Water

True

Occurs on Reefs

False

Is kept in Aquariums

False

Physical Size and Genetics

Maximum Length

55.0 cm

Common Length

Unknown cm

Phylogenetic Diversity Index

PD50 = 0.5000 many relatives (e.g. carps) 0.5 - 2.0 few relatives (e.g. lungfishes)

Human Uses and Population

Human Uses

Fisheries:

Vulnerability

Low to moderate vulnerability (31 of 100)

Resilience

Medium, minimum population doubling time 1.4 - 4.4 years (K=0.14-0.91; tm=3-5; tmax=19)

Threat To Humans

Harmless

IUCN Red List Status

Data deficient (DD)