The Persian sturgeon (Acipenser persicus) is a species of fish in the familyAcipenseridae. It is found in the Caspian Sea and to a lesser extent the Black Sea and ascends certain rivers to spawn, mainly the Volga, Kura, Araks and Ural Rivers. It is heavily fished for its flesh and its roe and is limited in its up-river migrations by damming of the rivers. Young fish feed on small invertebrates, graduating to larger prey such as crabs and fish as they grow. The threats faced by this fish include excessive fishing with the removal of immature fish before they have bred, damming of the rivers, loss of spawning areas and water pollution. The International Union for Conservation of Nature has listed the fish as critically endangered and has suggested that the increased provision of hatcheries could be of benefit.
The Persian or Caspian sturgeon has an elongated, bulky body with a bluish tint.[5] This type of sturgeon is endemic to the Caspian and Black Sea basins, but primarily resides in the Caspian Sea. Populations may also occur in tributaries and rivers inbound to the Caspian Sea. Sturgeons are commercially important fishes valued for their meat but mainly for their roe.[6] Formerly omnipresent in the region, heavy fishing of the sturgeon for caviar has forced it to Critically Endangered Species status.[7]
Distributionedit
The Persian sturgeon feeds at the shelf zone of the sea, primarily in the eastern part of the South Caspian. Individual specimens are found in the North Caspian, western part of the Middle and South Caspian.[8]
Ecologyedit
The Persian sturgeon is a heterotroph equipped with tactile and gustatory receptors; when feeding it simply sucks in its food. The eating habits of the sturgeon change throughout its life. As it begins life the sturgeon feeds on invertebrates including Mysid shrimp, Chironomid flies and gammarid amphipods. At approximately age 2–3 years many feed on crabs or fish, and finally in adulthood the Persian sturgeon consumption is primarily fish.[citation needed]
The sturgeon mainly reproduces in the Volga, Kura, Araks, and Ural rivers. This sexual reproduction occurs in waters that are 20-25 °C.[8] Spawning occurs at different times for the different rivers. There is spawning in the Volga river from late July to early August, in the Krua river from April to mid-September and in the Ural river from June to July. Other than at times of spawning the sturgeon is a bottom dweller in the mud or sand.[citation needed]
Conservationedit
There are four considerations one must account for when discussing the conservation of the Persian sturgeon. The regulation of streams and the damming of rivers, the loss of spawning areas, contamination levels of rivers into the Caspian Sea and fishing at sea.[8] Many of the problems for the sturgeon are inflicted by human activity, especially fishing. When fisherman take the sturgeon out of the sea prematurely they disrupt the ecological cycle by taking out immature fish and decreasing the spawning population. One such solution to this problem would be governmental or non-governmental subsidies to aid hatcheries in the artificial reproduction of the Persian sturgeon.[8]
Referencesedit
^Gesner, J.; Freyhof, J.; Kottelat, M. (2022). "Acipenser persicus". IUCN Red List of Threatened Species. 2022: e.T235A135063465. doi:10.2305/IUCN.UK.2022-1.RLTS.T235A135063465.en. Retrieved 18 June 2023.
^Alavi, Sayyed Mohammad Hadi & Cosson, Jacky. Sperm motility and fertilizing ability in the Persian sturgeon Acipenser persicus. Aquaculture Research, 2005, 36, 841-850. Accessed May 1, 2007.
^Sturgeon Specialist Group 1996. Acipenser persicus. In: IUCN 2006. 2006 IUCN Red List of Threatened Species. www.iucnredlist.org. Accessed April 27, 2007.
persian, sturgeon, acipenser, persicus, species, fish, family, acipenseridae, found, caspian, lesser, extent, black, ascends, certain, rivers, spawn, mainly, volga, kura, araks, ural, rivers, heavily, fished, flesh, limited, river, migrations, damming, rivers,. The Persian sturgeon Acipenser persicus is a species of fish in the family Acipenseridae It is found in the Caspian Sea and to a lesser extent the Black Sea and ascends certain rivers to spawn mainly the Volga Kura Araks and Ural Rivers It is heavily fished for its flesh and its roe and is limited in its up river migrations by damming of the rivers Young fish feed on small invertebrates graduating to larger prey such as crabs and fish as they grow The threats faced by this fish include excessive fishing with the removal of immature fish before they have bred damming of the rivers loss of spawning areas and water pollution The International Union for Conservation of Nature has listed the fish as critically endangered and has suggested that the increased provision of hatcheries could be of benefit Persian sturgeonAcipenser persicusConservation statusCritically Endangered IUCN 3 1 1 CITES Appendix II CITES 2 Scientific classificationDomain EukaryotaKingdom AnimaliaPhylum ChordataClass ActinopterygiiOrder AcipenseriformesFamily AcipenseridaeGenus AcipenserSpecies A persicusBinomial nameAcipenser persicusBorodin 1897Synonyms 3 4 Acipenser guldenstadti persicus Borodin 1897 Contents 1 Physical appearance 2 Distribution 3 Ecology 4 Conservation 5 ReferencesPhysical appearance editThe Persian or Caspian sturgeon has an elongated bulky body with a bluish tint 5 This type of sturgeon is endemic to the Caspian and Black Sea basins but primarily resides in the Caspian Sea Populations may also occur in tributaries and rivers inbound to the Caspian Sea Sturgeons are commercially important fishes valued for their meat but mainly for their roe 6 Formerly omnipresent in the region heavy fishing of the sturgeon for caviar has forced it to Critically Endangered Species status 7 Distribution editThe Persian sturgeon feeds at the shelf zone of the sea primarily in the eastern part of the South Caspian Individual specimens are found in the North Caspian western part of the Middle and South Caspian 8 Ecology editThe Persian sturgeon is a heterotroph equipped with tactile and gustatory receptors when feeding it simply sucks in its food The eating habits of the sturgeon change throughout its life As it begins life the sturgeon feeds on invertebrates including Mysid shrimp Chironomid flies and gammarid amphipods At approximately age 2 3 years many feed on crabs or fish and finally in adulthood the Persian sturgeon consumption is primarily fish citation needed The sturgeon mainly reproduces in the Volga Kura Araks and Ural rivers This sexual reproduction occurs in waters that are 20 25 C 8 Spawning occurs at different times for the different rivers There is spawning in the Volga river from late July to early August in the Krua river from April to mid September and in the Ural river from June to July Other than at times of spawning the sturgeon is a bottom dweller in the mud or sand citation needed Conservation editThere are four considerations one must account for when discussing the conservation of the Persian sturgeon The regulation of streams and the damming of rivers the loss of spawning areas contamination levels of rivers into the Caspian Sea and fishing at sea 8 Many of the problems for the sturgeon are inflicted by human activity especially fishing When fisherman take the sturgeon out of the sea prematurely they disrupt the ecological cycle by taking out immature fish and decreasing the spawning population One such solution to this problem would be governmental or non governmental subsidies to aid hatcheries in the artificial reproduction of the Persian sturgeon 8 References edit Gesner J Freyhof J Kottelat M 2022 Acipenser persicus IUCN Red List of Threatened Species 2022 e T235A135063465 doi 10 2305 IUCN UK 2022 1 RLTS T235A135063465 en Retrieved 18 June 2023 Appendices CITES cites org Retrieved 2022 01 14 Froese R Pauly D 2017 Acipenseridae FishBase version 02 2017 Retrieved 18 May 2017 Acipenseridae PDF Deeplyfish fishes of the world Retrieved 18 May 2017 Kuliev ZM amp Ivanova LA Acipenser persicus Caspian Environment Org http www caspianenvironment org biodb eng fishes Acipenser 20persicus main htm Accessed 4 27 2007 Alavi Sayyed Mohammad Hadi amp Cosson Jacky Sperm motility and fertilizing ability in the Persian sturgeon Acipenser persicus Aquaculture Research 2005 36 841 850 Accessed May 1 2007 Sturgeon Specialist Group 1996 Acipenser persicus In IUCN 2006 2006 IUCN Red List of Threatened Species www iucnredlist org Accessed April 27 2007 a b c d Kuliev ZM amp Ivanova LA Acipenser persicus Caspian Environment Org http www caspianenvironment org biodb eng fishes Acipenser 20persicus main htm Accessed April 27 2007 Retrieved from https en wikipedia org w index php title Persian sturgeon amp oldid 1162644176, wikipedia, wiki, book, books, library,
