The Siberian sturgeon has previously been divided into two subspecies.[1] However, recent studies suggest they may be monotypic, forming continuous genetically connected populations throughout their vast range.[4]
The previous nominate taxon (A. b. baerii) accounts for 80% of all Siberian sturgeon and resides in the Ob River and its tributaries. This population migrates to the mouth of the Ob during the winter due to seasonal oxygen deficiency, and swims thousands of kilometers upstream to spawn.[citation needed]
Also, previously considered a subspecies, A. b. baicalensis, known as the Baikal sturgeon, is a lake population found primarily in the northern end of Lake Baikal, and migrates up the Selenga River to spawn.[citation needed]
Once considered a third subspecies, "A. b. stenorrhynchus" resides in the eastern Siberian rivers and displays two life history patterns: a more abundant migratory one which swims considerable distances (sometimes thousands of kilometers) upstream from estuaries and deltas to spawn, and a nonmigratory form.[citation needed]
Description and population statusedit
Siberian sturgeon usually weigh about 65 kg, with considerable variability between and within river basins. The maximum recorded weight was 210 kg. As with all other acipenserids, the Siberian sturgeon are long-lived (up to 60 years), and late to reach sexual maturity (males at 11–24 years, females at 20–28 years). They spawn in strong current main stem river channels over stone or gravel substrates.[1]
The Siberian sturgeon feeds on a variety of benthic organisms, such as crustaceans and chironomid larvae.[citation needed]
The species had been in steep decline in its natural range due to habitat loss, degradation, and poaching.[1] Up to 40% of the Siberian sturgeon spawning habitat has been made inaccessible by damming. High levels of pollution in certain places have led to significant negative impacts on the reproductive development of gonads.[5]
Aquacultureedit
While wild catches have been generally declining, the Siberian sturgeon is increasingly farmed both for meat and to produce caviar from its roe. Because the Lena population of A. baerii completes its lifecycle in fresh water and sexually matures relatively early, it is the most common original broodstock for captive-bred specimens. The main producer of Siberian sturgeon caviar is France, while the largest meat producers are Russia and China.[6]
Female A. baerii farm bred in Les, Vall d'Aran, Spain
^"Appendices | CITES". cites.org. Retrieved 14 January 2022.
^Froese, Rainer; Pauly, Daniel (eds.) (2022). "Acipenser baerii" in FishBase. April 2022 version.
^Ruban, G.I. (1999). [The Siberian Sturgeon Acipenser baerii Brandt (Structure and Ecology of the Species)]. Moscow. GEOS publishers. Pp. 235 (in Russian).
^Akimova, N.V. and Ruban, G.I. 2001. Reproductive System Condition and the Reason for Decreased Abundance of Siberian Sturgeon Acipenser baerii in the Ob’ River. Journal of Ichthyology 41(2): 177-181.
G. I. Ruban, Siberian Sturgeon Acipenser baerii Brandt (Species Structure and Ecology) (GEOS, Moscow, 1999) [in Russian].
FAO fact page on A. baerii aquaculture.
February 15, 2024
siberian, sturgeon, acipenser, baerii, species, sturgeon, family, acipenseridae, most, present, major, siberian, river, basins, that, drain, northward, into, kara, laptev, east, siberian, seas, including, yenisei, which, drains, lake, baikal, angara, river, le. The Siberian sturgeon Acipenser baerii is a species of sturgeon in the family Acipenseridae It is most present in all of the major Siberian river basins that drain northward into the Kara Laptev and East Siberian Seas including the Ob Yenisei which drains Lake Baikal via the Angara River Lena and Kolyma Rivers It is also found in Kazakhstan and China in the Irtysh River a major tributary of the Ob The species epithet honors the German Russian biologist Karl Ernst von Baer Siberian sturgeonAcipenser baeriiConservation statusCritically Endangered IUCN 3 1 1 CITES Appendix II CITES 2 Scientific classificationDomain EukaryotaKingdom AnimaliaPhylum ChordataClass ActinopterygiiOrder AcipenseriformesFamily AcipenseridaeGenus AcipenserSpecies A baeriiBinomial nameAcipenser baeriiJ F Brandt 1869Synonyms 3 Acipenser baeri Brandt 1869Acipenser baeri baicalensis Nikolskii 1896Acipenser baeri stenorrhynchus Nikolskii 1896Acipenser baerii baerii Brandt 1869Acipenser baerii baicalensis Nikolskii 1896Acipenser baerii baikalensis Nikolskii 1896Acipenser baerii stenorrhynchus Nikolskii 1896Acipenser baieri Brandt 1869Acipenser stenorrhynchus Nikolskii 1896Acipenser stenorrhynchus baicalensis Nikolskii 1896 Contents 1 Taxonomy 2 Description and population status 3 Aquaculture 4 References 5 External linksTaxonomy editThe Siberian sturgeon has previously been divided into two subspecies 1 However recent studies suggest they may be monotypic forming continuous genetically connected populations throughout their vast range 4 The previous nominate taxon A b baerii accounts for 80 of all Siberian sturgeon and resides in the Ob River and its tributaries This population migrates to the mouth of the Ob during the winter due to seasonal oxygen deficiency and swims thousands of kilometers upstream to spawn citation needed Also previously considered a subspecies A b baicalensis known as the Baikal sturgeon is a lake population found primarily in the northern end of Lake Baikal and migrates up the Selenga River to spawn citation needed Once considered a third subspecies A b stenorrhynchus resides in the eastern Siberian rivers and displays two life history patterns a more abundant migratory one which swims considerable distances sometimes thousands of kilometers upstream from estuaries and deltas to spawn and a nonmigratory form citation needed Description and population status editSiberian sturgeon usually weigh about 65 kg with considerable variability between and within river basins The maximum recorded weight was 210 kg As with all other acipenserids the Siberian sturgeon are long lived up to 60 years and late to reach sexual maturity males at 11 24 years females at 20 28 years They spawn in strong current main stem river channels over stone or gravel substrates 1 The Siberian sturgeon feeds on a variety of benthic organisms such as crustaceans and chironomid larvae citation needed The species had been in steep decline in its natural range due to habitat loss degradation and poaching 1 Up to 40 of the Siberian sturgeon spawning habitat has been made inaccessible by damming High levels of pollution in certain places have led to significant negative impacts on the reproductive development of gonads 5 Aquaculture editWhile wild catches have been generally declining the Siberian sturgeon is increasingly farmed both for meat and to produce caviar from its roe Because the Lena population of A baerii completes its lifecycle in fresh water and sexually matures relatively early it is the most common original broodstock for captive bred specimens The main producer of Siberian sturgeon caviar is France while the largest meat producers are Russia and China 6 nbsp Female A baerii farm bred in Les Vall d Aran SpainReferences edit a b c d Ruban G Mugue N 2022 Acipenser baerii IUCN Red List of Threatened Species 2022 e T244A156718817 Retrieved 2 August 2022 Appendices CITES cites org Retrieved 14 January 2022 Froese Rainer Pauly Daniel eds 2022 Acipenser baerii in FishBase April 2022 version Ruban G I 1999 The Siberian Sturgeon Acipenser baerii Brandt Structure and Ecology of the Species Moscow GEOS publishers Pp 235 in Russian Akimova N V and Ruban G I 2001 Reproductive System Condition and the Reason for Decreased Abundance of Siberian Sturgeon Acipenser baerii in the Ob River Journal of Ichthyology 41 2 177 181 Jesus Matallanas FIGIS Species Fact Sheets Species Identification and Data Programme SIDP In FAO Fisheries and Aquaculture Department online Rome Updated Cited 18 June 2010 http www fao org fishery culturedspecies Acipenser baerii enExternal links editG I Ruban Siberian Sturgeon Acipenser baerii Brandt Species Structure and Ecology GEOS Moscow 1999 in Russian CITES Siberian sturgeon A baerii FAO fact page on A baerii aquaculture Retrieved from https en wikipedia org w index php title Siberian sturgeon amp oldid 1190341589, wikipedia, wiki, book, books, library,
