http://www.fishbase.org/Summary/SpeciesSummary.cfm?genusname=Lampetra&speciesname=ayresii
| Lampetra
ayresii River lamprey |
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| Lampetra ayresii (Günther, 1870) | ||||
| Family: | Petromyzontidae (Lampreys) , subfamily: Petromyzontinae | No FishBase
pictures available. Try GoogleImages. Map |
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| Order: | Petromyzontiformes (lampreys) | |||
| Class: | Cephalaspidomorphi (lampreys) | |||
| FishBase name: | River lamprey | |||
| Max. size: | 28.1 cm TL (male/unsexed; Ref. 1998); 31.1 cm (female) | |||
| Environment: | demersal; anadromous; freshwater; brackish; marine | |||
| Climate: | temperate; 59°N - 37°N | |||
| Importance: | fisheries: minor commercial | |||
| Resilience: | ||||
| Distribution: Gazetteer |
Eastern Pacific: Tee Harbor, Alaska to Sacramento-San Joaquin drainage in California, USA. Freshwater resident population in Morrison Creek, Vancouver Island, British Columbia (Ref. 12269). | |||
| Diagnosis: | Distinguished by 2 large teeth on the supraoral bar, a large middle tooth on the tongue, 3 points (rarely 2) on each central lateral tooth plate, and the absence of posterial teeth (Ref. 27547). Anterior dorsal fin being lower than posterior, the fins separate in nonbreeding individuals but coming into contact at spawning; caudal fin lobes about equal, lower lobe joined to anal fin; anal fin virtually absent in males (Ref. 27547). Dark brown or brownish gray on sides and back; belly yellowish, silvery around head, gill openings and lower sides; caudal fin has a band of dark pigment inside its margins, symmetrical on each lobe (Ref. 27547). | |||
| Biology: | Parasitic adults are found in estuaries and the ocean, migrating to clear gravel riffles of streams to spawn (Ref. 5723). Ammocoetes burrow into the mud where they live for an unknown period and migrate to the sea only after transformation (Ref. 1998). Adults feed by ripping flesh from other fishes (Ref. 2850). Because of its small size, it is unlikely to pose a threat to economically important fish (Ref. 1998). Utilized fresh or smoked by some cultures (Ref. 27436) | |||
| Red List Status: | Not in IUCN Red List , (Ref. 36508) | |||
| Dangerous: | harmless | |||
| Coordinator: | ||||
| Main Ref: | Page, L.M. and B.M. Burr. 1991. (Ref. 5723) | |||
| Update | Add | Get XML file | Point data in XML | Common names in XML | ||||
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Map Courtesy of the University of California at Davis