Alaskan brook lamprey (Lampetra alaskensis) fish species and information / pictures of Alaskan brook lamprey - Lampetra alaskensis

Alaskan brook lamprey (Lampetra alaskensis) fish species information

Scientific Name
Lampetra alaskensis

Common Name
Alaskan brook lamprey

Biology
Adult preserved specimens gray-brown dorsally, white ventrally, with a dark blotch on 2nd dorsal fin; tail dark. Teeth on disk blunt and weakly cornified. Supraoral bar with 2 cusps. Infraoral bar with 6-11 cusps. Lateral tooth plates 3, central pair with 2 cusps. Tongue teeth poorly developed and blunt. Posterial teeth present. A few, supplementary marginal teeth present on the lateral areas of the disk. Typical length 12-17 cm TL (Ref. 43939). Trunk myomeres 66-72 (Ref. 43938).

Classification

Classified By

Vladykov & Kott, 1978

Class

Lampreys (Cephalaspidomorphi)

Order

Lampreys (Petromyzontiformes)

Family

Lampreys (Petromyzontidae)

Distribution

Region

North America

Distribution

North America: Alaska and Kenai peninsulas to Chatanika and Chena rivers near Fairbanks; Martin River, Mackenzie River basin, Northwest Territories.

Range

Unknown

Environment

Climate

Temperate

Water Temperature From

Unknown °C

Water Temperature To

Unknown °C

Depth From - meters

Unknown m

Depth To - meters

Unknown m

Zone

demersal

Environment

Freshwater; demersal; potamodromous (Ref. 43939)

Trophic Level

4.04 s.e. 0.69 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

18.8 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

Unknown

Vulnerability

Moderate to high vulnerability (45 of 100)

Resilience

Low, minimum population doubling time 4.5 - 14 years (tm=tmax=5)

Threat To Humans

Harmless

IUCN Red List Status

Not Evaluated