Lampetra richardsoni Vladykov & Follett, 1965

Western brook lamprey

Catalog of Fishes (gen., sp.) | ITIS | CoL

Classification	Cephalaspidomorphi \| Petromyzontiformes \| Petromyzontidae \| Petromyzontinae
Synonyms	... more
Common names	Lamprey eel, Lamproie de l' ouest, 西方七鳃鳗, ... more

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Image of Lampetra richardsoni (Western brook lamprey)

Picture by Goodman, D.

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Main reference

Page, L.M. and B.M. Burr. 1991. (Ref. 5723)
Other references | Biblio | Coordinator | Collaborators

Size / Weight / Age

Max length : 15.0 cm TL male/unsexed; (Ref. 5723); common length : 12.5 cm TL male/unsexed; (Ref. 12193)

Environment

Demersal; non-migratory; freshwater

Climate / Range

Temperate; 57°N - 43°N

North America: Pacific slope from McDonald Lake, southeastern Alaska to Umpqua River drainage in Oregon, USA.
Countries | FAO areas | Ecosystems | Occurrences | Introductions

Short description

Distinguished by the very blunt teeth, the lack of a distinct median tooth on the tongue and the lack of posterial teeth (Ref. 27547). Anterior dorsal fin lower than the posterior, arising well back on body; caudal fin joined to both dorsal and anal fins; anal fin small, represented in males by a low ridge (Ref. 27547). Females with a pointed 2nd dorsal fin and a conspicuous anal lobe (Ref. 1998). Back and sides dark gray to brown, ventral side of body whitish (Ref. 27547); fins translucent olive-green and the caudal fin with diffuse black pigment (Ref. 1998).

Inhabits gravel riffles and runs of clear, cool streams (Ref. 5723). Ammocoetes occur in muddy and sandy backwaters and pools of streams (Ref. 5723). Ammocoete feed mostly on diatoms but also on other microscopic plant and animal matter (Ref. 1998). Transformed lampreys do not feed at all (Ref. 1998). Nonparasitic (Ref. 5723).


IUCN Red List Status (Ref. 57073)	Threat to humans
Not Evaluated	Harmless

Human uses
Fisheries: of no interest; bait: usually


More information
Countries FAO areas Ecosystems Occurrences Introductions Ecology Diet Food items Food consumption Ration	Common names Synonyms Metabolism Predators Ecotoxicology Reproduction Maturity Spawning Eggs Egg development	Age/Size Growth Length-weight Length-length Length-frequencies Morphometrics Morphology Larvae Larval dynamics Recruitment	Other references Biblio Aquaculture Aquaculture profile Strains Genetics Allele frequencies Heritability Diseases Processing	Collaborators Pictures Stamps Sounds Ciguatera Speed Swim. type Gill area Otoliths Brains Vision

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Internet sources

Estimation of some characteristics with mathematical models

Resilience (Ref. 69278)

Medium, minimum population doubling time 1.4 - 4.4 years (Fec=1,100-3,700 (semelparous))


Vulnerability (Ref. 59153)	Price category (Ref. 80766)
Low to moderate vulnerability (34 of 100)	Not marketed/unknown

Entered by Froese, Rainer

Modified by Garilao, Cristina V.

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Page last modified by : elaxamana, 15 July 2009

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