The Caspian lamprey, Caspiomyzon wagneri, is a species of lamprey native to the Caspian Sea, and a member of the Petromyzontidae family. This species is a non-parasitic lamprey that feeds on animal carcasses.
Formerly thought to be the only member of the genus Caspiomyzon, phylogenetic evidence suggests that Eudontomyzon hellenicus and E. graecus (if separate from E. hellenicus) also belong in this genus, and have thus been reclassified as such.[3]
Descriptionedit
The Caspian lamprey is a slim-bodied, eel-like fish that grows to a length of about 40 cm (16 in). The longest recorded specimen was 55 cm (22 in) long and weighed 206 g (7.3 oz). Like other lampreys, it has no jaws, but it has a round oral disc surrounding the mouth. Inside this it has several radiating rows of tiny, backward-facing teeth. There is a single nostril near the eyes. There are no gill covers and the seven gill openings are visible just behind the head. The fish has no scales or paired fins, but has two elongated dorsal fins, the hindmost of which nearly joins onto the small tail fin. The Caspian lamprey is a silvery-grey colour.[4]
Distributionedit
The Caspian lamprey is an anadromous fish which spends its adult life in the Caspian Sea and migrates up the Volga, Sura, and other rivers to spawn. It was at one time a common fish caught in nets and fish traps in the lower Volga for extracting fish oil and making candles and later for human consumption. In the early 1900s, 15 to 30 million fish were harvested annually from the lower Volga. It is now an uncommon fish because its migratory routes have been disrupted by dams and construction projects and it can no longer reach its spawning grounds.[5]
Statusedit
The Caspian lamprey is listed as "Near Threatened" in the IUCN Red List of Threatened Species. Damming of rivers in the mid-20th century has caused it to be cut off from its traditional spawning sites, but new sites have been found below the dams. The chief threat more recently has been the drying up of these streams caused by drought.[1]
Referencesedit
^ abFreyhof, J.; Kottelat, M. (2008). "Caspiomyzon wagneri". IUCN Red List of Threatened Species. 2008: e.T135706A4187207. doi:10.2305/IUCN.UK.2008.RLTS.T135706A4187207.en. Retrieved 12 November 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.
^Froese, Rainer and Pauly, Daniel, eds. (2017). Species of Caspiomyzon in FishBase. May 2017 version.
^Maitland, Peter S. (2000). Freshwater Fish of Britain and Europe. Octopus Publishing Group. pp. 62–64. ISBN0-600-59690-7.
^Froese, Rainer; Pauly, Daniel (eds.) (2012). "Caspiomyzon wagneri" in FishBase. September 2012 version.
January 01, 1970
caspian, lamprey, caspiomyzon, wagneri, species, lamprey, native, caspian, member, petromyzontidae, family, this, species, parasitic, lamprey, that, feeds, animal, carcasses, conservation, status, near, threatened, iucn, scientific, classification, domain, euk. The Caspian lamprey Caspiomyzon wagneri is a species of lamprey native to the Caspian Sea and a member of the Petromyzontidae family This species is a non parasitic lamprey that feeds on animal carcasses Caspian lamprey Conservation status Near Threatened IUCN 3 1 1 Scientific classification Domain Eukaryota Kingdom Animalia Phylum Chordata Infraphylum Agnatha Class Hyperoartia Order Petromyzontiformes Family Petromyzontidae Genus Caspiomyzon Species C wagneri Binomial name Caspiomyzon wagneri Kessler 1870 Synonyms 2 Petromyzon wagneri Kessler 1870 Agnathomyzon wagneri Kessler 1870 Agnathomyzon Haploglossa caspicus Gratzianov 1907 Haploglossa caspica Gratzianov 1907 Contents 1 Taxonomy 2 Description 3 Distribution 4 Status 5 ReferencesTaxonomy editFormerly thought to be the only member of the genus Caspiomyzon phylogenetic evidence suggests that Eudontomyzon hellenicus and E graecus if separate from E hellenicus also belong in this genus and have thus been reclassified as such 3 Description editThe Caspian lamprey is a slim bodied eel like fish that grows to a length of about 40 cm 16 in The longest recorded specimen was 55 cm 22 in long and weighed 206 g 7 3 oz Like other lampreys it has no jaws but it has a round oral disc surrounding the mouth Inside this it has several radiating rows of tiny backward facing teeth There is a single nostril near the eyes There are no gill covers and the seven gill openings are visible just behind the head The fish has no scales or paired fins but has two elongated dorsal fins the hindmost of which nearly joins onto the small tail fin The Caspian lamprey is a silvery grey colour 4 Distribution editThe Caspian lamprey is an anadromous fish which spends its adult life in the Caspian Sea and migrates up the Volga Sura and other rivers to spawn It was at one time a common fish caught in nets and fish traps in the lower Volga for extracting fish oil and making candles and later for human consumption In the early 1900s 15 to 30 million fish were harvested annually from the lower Volga It is now an uncommon fish because its migratory routes have been disrupted by dams and construction projects and it can no longer reach its spawning grounds 5 Status editThe Caspian lamprey is listed as Near Threatened in the IUCN Red List of Threatened Species Damming of rivers in the mid 20th century has caused it to be cut off from its traditional spawning sites but new sites have been found below the dams The chief threat more recently has been the drying up of these streams caused by drought 1 References edit a b Freyhof J Kottelat M 2008 Caspiomyzon wagneri IUCN Red List of Threatened Species 2008 e T135706A4187207 doi 10 2305 IUCN UK 2008 RLTS T135706A4187207 en Retrieved 12 November 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 Froese Rainer and Pauly Daniel eds 2017 Species of Caspiomyzon in FishBase May 2017 version Maitland Peter S 2000 Freshwater Fish of Britain and Europe Octopus Publishing Group pp 62 64 ISBN 0 600 59690 7 Froese Rainer Pauly Daniel eds 2012 Caspiomyzon wagneri in FishBase September 2012 version Retrieved from https en wikipedia org w index php title Caspian lamprey amp oldid 1200797431, wikipedia, wiki, book, books, library,
