Pacific lamprey (Lampetra tridentata) fish profile and information / pictures of Pacific lamprey - Lampetra tridentata

Pacific lamprey (Lampetra tridentata) fish profile

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Scientific Name Lampetra tridentata
Classified By Richardson, 1836
Common Name Pacific lamprey
Class Lampreys (Cephalaspidomorphi)
Order Lampreys (Petromyzontiformes)
Family Lampreys (Petromyzontidae)
Biology Characterized by the presence of 3 large sharp teeth on the supraoral bar and three sharp points on each of the central lateral tooth plates. Dorsal fins arise far back on the body, the anterior fin lower and shorter, higher in males; lower lobe of caudal fin larger than upper, the lobes joined to dorsal and anal fins; anal fin rudimentary, virtually absent in males. Adults from the sea blue-black to greenish above, silvery to white below; spawning adults become reddish brown.
Climate Temperate
Water Temperature From - Celcius Unknown °C
Water Temperature To - Celcius Unknown °C
Depth From - meters 0 m
Depth To - meters 1100 m
Zone demersal
Distribution North Pacific: Bering Sea coasts of Asia and Alaska southward to the Yuhutu River, Hokkaido, northern Japan and Punta Canoas, central Baja California, Mexico. The populations were, at one time, split into two groups as Entosphenus tridentatus tridentatus which ranged from the Columbia River to Alaska, and Entosphenus tridentatus ciliatus which ranged from Klamath River southwards. This division no longer holds. Freshwater resident populations exist in Culrus Lake and the Columbia River, British Columbia, the Sprague River in Oregon, the Goose Lake in Oregon/California, and the Klamath and Shasta rivers and Copco Lake in California.
Region North Pacific
Range 65°N - 32°N
Maximum Length 76.0 cm
Common Length 41.0 cm
Environment Marine; freshwater; brackish; demersal; anadromous ; depth range 0 - 1100 m
Vulnerability High to very high vulnerability (69 of 100)
Resilience Low, minimum population doubling time 4.5 - 14 years (tm 6-8; Fec=10,000-106,000 (semelparous))
Threat To Humans Harmless
IUCN Red List Status Not Evaluated
Human Uses Fisheries: subsistence fisheries
Phylogenetic Diversity Index PD50 = 0.5000 many relatives (e.g. carps) 0.5 - 2.0 few relatives (e.g. lungfishes)
Trophic Level 4.5 s.e. 0.80 Based on food items.
Is kept in Aquariums False
Occurs in Marine / Salt water True
Occurs in Brackish water True
Occurs in Fresh Water True
Occurs on Reefs False