Alaska blackfish (Dallia pectoralis) fish species and information / pictures of Alaska blackfish - Dallia pectoralis

Alaska blackfish (Dallia pectoralis) fish species information

Scientific Name
Dallia pectoralis

Common Name
Alaska blackfish

Biology
Dorsal spines (total): 0; Dorsal soft rays (total): 10-14; Anal spines: 0; Anal soft rays: 12 - 16; Vertebrae: 40 - 42. Identified by its short, flattened snout, the rearward location of the dorsal and anal fins, the presence of about 33 rays in the pectorals, and the presence of a pelvic fin that has only 3 rays (Ref. 27547). Gill rakers short; lateral line with minute pores: 76 to 100 scales in midlateral series (Ref. 27547). Dorsal located far back on body; anal more or less under dorsal; edge of pectorals rounded; pelvic fins very small and located just before anus; caudal broad and rounded (Ref. 27547). Dark green or brown above and on upper sides, pale below with dark speckles; four to six irregular dark bars or blotches on sides; fins have dark brownish specklings; dorsal, anal and caudal fins with pale margin, which are pink to red in spawning adults (Ref. 27547).

Classification

Classified By
Bean, 1880
Class
Ray-finned fishes (Actinopterygii)
Order
Pikes and Mudminnows (Esociformes)
Family
Mudminnows (Umbridae)

Distribution

Region
North America
Distribution
North America: Alaska from Colville River delta south to central Alaska Peninsula near Chignik; upstream in Yukon-Tanana drainage to near Fairbanks. Also Bering Sea islands and northeastern Siberia, Russia.
Range
72°N - 55°N

Environment

Climate
Boreal
Water Temperature From
4 °C
Water Temperature To
14 °C
Depth From - meters
Unknown m
Depth To - meters
Unknown m
Zone
demersal
Environment
Freshwater; demersal
Trophic Level
3.31 s.e. 0.44 Based on food items.
Occurs in Marine / Salt water
False
Occurs in Brackish water
False
Occurs in Fresh Water
True
Occurs on Reefs
False
Is kept in Aquariums
True

Physical Size and Genetics

Maximum Length
33.0 cm
Common Length
10.8 cm
Phylogenetic Diversity Index
PD50 = 0.6331 many relatives (e.g. carps) 0.5 - 2.0 few relatives (e.g. lungfishes)

Human Uses and Population

Human Uses
Fisheries: subsistence fisheries; aquarium: commercial
Vulnerability
Low to moderate vulnerability (31 of 100)
Resilience
Medium, minimum population doubling time 1.4 - 4.4 years (tm=2-3; tmax=8; Fec=40-300)
Threat To Humans
  Harmless
IUCN Red List Status
  Not Evaluated