White bream (Blicca bjoerkna) fish species and information / pictures of White bream - Blicca bjoerkna

White bream (Blicca bjoerkna) fish species information

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Scientific Name
Blicca bjoerkna

Common Name
White bream

Biology
Gregarious and frequents stagnant waters of lakes and reservoirs, rivers and canals with calm waters. Occurs in a wide variety of shallow, warm lowland lakes and slow-flowing lower reaches of large rivers and canals. Frequently very abundant on bottom of large sandy rivers. Larvae live in still water bodies. Mainly nocturnal. Feeds on benthic invertebrates. Spawns along shores on submerged vegetations, roots or even on shallow gravel bottom. Reproduction takes place in May to July. Exhibits polyandry. Regularly hybridizes with Vimba vimba. Of little interest to game fishers and consumers. Unpopular with commercial fishers due to its small size and competition with more desired species.

Classification

Classified By

Linnaeus, 1758

Class

Ray-finned fishes (Actinopterygii)

Order

Carps (Cypriniformes)

Family

Minnows or carps (Cyprinidae)

Distribution

Region

Europe and Asia

Distribution

Europe and Asia: North, Baltic, White, Black and Caspian Sea basins, Atlantic basin southward to Adour drainage and Mediterranean basin in France. In Aral, Marmara and Anatolian Black Sea basins west of Ankara. Naturally absent from Iberian Peninsula, Italy, Adriatic basin, Crimea, Great Britain , Scandinavia north of Sundsvall and 65? N. Locally introduced in Spain and northeastern Italy; in France, apparently introduced in smal coastal drainages of Var.

Range

65°N - 40°N

Environment

Climate

Temperate

Water Temperature From

4 °C

Water Temperature To

20 °C

Depth From - meters

0 m

Depth To - meters

Unknown m

Zone

demersal

Environment

Freshwater; brackish; demersal; potamodromous ; depth range 0 - ? m

Trophic Level

3.07 s.e. 0.37 Based on diet studies.

Occurs in Marine / Salt water

False

Occurs in Brackish water

True

Occurs in Fresh Water

True

Occurs on Reefs

False

Is kept in Aquariums

True

Physical Size and Genetics

Maximum Length

36.0 cm

Common Length

20.0 cm

Phylogenetic Diversity Index

PD50 = 1.0000 many relatives (e.g. carps) 0.5 - 2.0 few relatives (e.g. lungfishes)

Human Uses and Population

Human Uses

Fisheries: minor commercial; aquarium: public aquariums; bait: occasionally

Vulnerability

High vulnerability (62 of 100)

Resilience

Medium, minimum population doubling time 1.4 - 4.4 years (K=0.10-0.27; tm=3-4)

Threat To Humans

Harmless

IUCN Red List Status

Least Concern (LC)