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

White bream (Blicca bjoerkna) fish species information

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)