Lampetra ayresii is a species of lamprey in the family Petromyzontidae. It is also called the river lamprey or western river lamprey. It is found in the eastern Pacific, specifically from Tee Harbor, Juneau in Alaska to the Sacramento–San Joaquin drainage in California, USA.[4][3] It can survive in both marine surface waters and freshwater lakes, rivers, and creeks. In freshwater, it is found typically in the lower portions of large river systems.[5] It is a predatory fish and feeds on fishes in the size range of 10–30 cm. It feeds by attaching to prey using its round, sucker-like mouth.[6] Adult western river lampreys typically grow to about 21 cm (8.3 in) total length (TL), but can reach 31 cm (12 in) TL.[3]
Western river lampreys are noted by their long body, round mouth, and lack of jaws. On their disk-like mouth is two teeth, one tooth on the tongue, 3 points on each central lateral tooth plate, and no posterior teeth.[5] They have no scales, and are typically dark brown in color, with yellow bellies and silver around the head, gill openings and lower sides.[3]
Western River Lampreys live on average for 6–7 years, spending most of their life in freshwaters and only living in marine waters for about 10 weeks. Starting their lives as an ammocoete (larva), they burrow into the stream bottom and survive as filter feeders. They can live like this for 2–7 years, after which they begin a metamorphosis into their macropthalmia (juvenile) stage.[5] This metamorphosis starts in the months of July–April, and can take up to 9–10 months, the longest of any lamprey.[6] After metamorphosis, they enter the ocean as adults between the months of May and July. They spend a parasitic feeding phase here for 10 weeks, during which they grow rapidly and reach their maximum size.[6] After their feeding phase, they migrate back to fresh waters to spawning areas. They likely prefer spawning areas upstream and with gravel bottoms. Both sexes will move around stones to construct the nests.[6] Each female will then lay around 11,400 to 37,300 eggs.[3] Adults die after the eggs are laid and fertilized.[5]
DietEdit
The river lamprey begins as a filter feeder in its ammocoete stage. During this time, they feed on algae and detritus.[5] Parasitism begins in the adult stage and once it has reached 16.2 cm.[3] During this time it feeds on 10–30 cm fishes, most commonly herring and salmon. To feed, it attaches to the back of its prey above the lateral line, using its round mouth. There it sucks on muscle tissue.[6]
ReferencesEdit
^NatureServe. (2013). "Lampetra ayresii". IUCN Red List of Threatened Species. 2013: e.T202625A18230111. doi:10.2305/IUCN.UK.2013-1.RLTS.T202625A18230111.en. Retrieved 3 December 2021.
^Van Der Laan, Richard; Eschmeyer, William N.; Fricke, Ronald (11 November 2014). "Family-group names of Recent fishes". Zootaxa. 3882 (1): 1–230. doi:10.11646/zootaxa.3882.1.1. PMID 25543675.
^ abcdefFroese, Rainer; Pauly, Daniel (eds.) (2021). "Lampetra ayresii" in FishBase. June 2021 version.
^"Lampetra ayresi (Günther, 1870)". Catalogue of Life. catalogueoflife.org. Retrieved 2016-06-26.
^ abcdef"River Lamprey Lampetra ayresii" (PDF). Species Fact Sheet. U.S. Fish & Wildlife Service. Retrieved 29 Nov 2020.{{cite web}}: CS1 maint: url-status (link)
^ abcde"Western River Lamprey Lampetra ayresii". California Department of Fish and Wildlife. Retrieved 29 Nov 2020.{{cite web}}: CS1 maint: url-status (link)
August 25, 2023
lampetra, ayresii, species, lamprey, family, petromyzontidae, also, called, river, lamprey, western, river, lamprey, found, eastern, pacific, specifically, from, harbor, juneau, alaska, sacramento, joaquin, drainage, california, survive, both, marine, surface,. Lampetra ayresii is a species of lamprey in the family Petromyzontidae It is also called the river lamprey or western river lamprey It is found in the eastern Pacific specifically from Tee Harbor Juneau in Alaska to the Sacramento San Joaquin drainage in California USA 4 3 It can survive in both marine surface waters and freshwater lakes rivers and creeks In freshwater it is found typically in the lower portions of large river systems 5 It is a predatory fish and feeds on fishes in the size range of 10 30 cm It feeds by attaching to prey using its round sucker like mouth 6 Adult western river lampreys typically grow to about 21 cm 8 3 in total length TL but can reach 31 cm 12 in TL 3 Lampetra ayresiiConservation statusLeast Concern IUCN 3 1 1 Scientific classificationDomain EukaryotaKingdom AnimaliaPhylum ChordataInfraphylum AgnathaClass HyperoartiaOrder PetromyzontiformesFamily PetromyzontidaeGenus LampetraSpecies L ayresiiBinomial nameLampetra ayresii Gunther 1870 Synonyms 2 3 Petromyzon ayresii Gunther 1870 Petromyzon plumbeus Ayres 1855 Ammocoetes cibarius Girard 1858 Lampetra cibaria Girard 1858 Mouth of river lamprey Contents 1 Description 2 Life cycle 3 Diet 4 ReferencesDescription EditWestern river lampreys are noted by their long body round mouth and lack of jaws On their disk like mouth is two teeth one tooth on the tongue 3 points on each central lateral tooth plate and no posterior teeth 5 They have no scales and are typically dark brown in color with yellow bellies and silver around the head gill openings and lower sides 3 Western river lamprey larvae are very visually similar to Pacific lamprey and western brook lamprey larvae and are virtually indistinguishable 5 Life cycle EditWestern River Lampreys live on average for 6 7 years spending most of their life in freshwaters and only living in marine waters for about 10 weeks Starting their lives as an ammocoete larva they burrow into the stream bottom and survive as filter feeders They can live like this for 2 7 years after which they begin a metamorphosis into their macropthalmia juvenile stage 5 This metamorphosis starts in the months of July April and can take up to 9 10 months the longest of any lamprey 6 After metamorphosis they enter the ocean as adults between the months of May and July They spend a parasitic feeding phase here for 10 weeks during which they grow rapidly and reach their maximum size 6 After their feeding phase they migrate back to fresh waters to spawning areas They likely prefer spawning areas upstream and with gravel bottoms Both sexes will move around stones to construct the nests 6 Each female will then lay around 11 400 to 37 300 eggs 3 Adults die after the eggs are laid and fertilized 5 Diet EditThe river lamprey begins as a filter feeder in its ammocoete stage During this time they feed on algae and detritus 5 Parasitism begins in the adult stage and once it has reached 16 2 cm 3 During this time it feeds on 10 30 cm fishes most commonly herring and salmon To feed it attaches to the back of its prey above the lateral line using its round mouth There it sucks on muscle tissue 6 References Edit NatureServe 2013 Lampetra ayresii IUCN Red List of Threatened Species 2013 e T202625A18230111 doi 10 2305 IUCN UK 2013 1 RLTS T202625A18230111 en Retrieved 3 December 2021 Van Der Laan Richard Eschmeyer William N Fricke Ronald 11 November 2014 Family group names of Recent fishes Zootaxa 3882 1 1 230 doi 10 11646 zootaxa 3882 1 1 PMID 25543675 a b c d e f Froese Rainer Pauly Daniel eds 2021 Lampetra ayresii in FishBase June 2021 version Lampetra ayresi Gunther 1870 Catalogue of Life catalogueoflife org Retrieved 2016 06 26 a b c d e f River Lamprey Lampetra ayresii PDF Species Fact Sheet U S Fish amp Wildlife Service Retrieved 29 Nov 2020 a href Template Cite web html title Template Cite web cite web a CS1 maint url status link a b c d e Western River Lamprey Lampetra ayresii California Department of Fish and Wildlife Retrieved 29 Nov 2020 a href Template Cite web html title Template Cite web cite web a CS1 maint url status link Retrieved from https en wikipedia org w index php title Lampetra ayresii amp oldid 1063646925, wikipedia, wiki, book, books, library,
