Knowledge (XXG)

Amu Darya sturgeon

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and Uzbekistan institutes as well as officials of Tajikistan) has attempted to start a breeding program for the Amu Darya sturgeon, but as of 2021 it has not succeeded (in 2020  Khorezm Mamun Academy in Khiva (Khorezm province branch of Academy of Sciences of Uzbekistan) - the main partner in the program) has temporary stopped shovelnose conservation project because of lack of financial support) although some progress was made (the eggs were incubated in the field in 2012 but the embryos died).
1499: 31: 1505: 92: 50: 311:, reaching up to 2 kg (4.4 lb) in weight and 75 cm (30 in) in total length, excluding tail filament. It has a long, thin tail filament. For example, two individuals that both had a length of about 55 cm (22 in) excluding tail filament were 77 cm (30.5 in) and 85.5 cm (33.5 in) including tail filament. The species occurs in two 337:
May when the water is 14 to 16 °C (57 to 61 °F). During a season, a female of the large morph lays about 3,100–36,500 eggs and a female of the small morph about 1,000–2,000 eggs, but it is possible that they only do this every 4–5-year. The species can reach an age of more than 14 years. Historically, it was known to
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Bernard R. Kuhajda (University of Alabama, USA), Richard L. Mayden (St.Louis University, USA), Vladimir. B. Sal’nikov (National Institute of Deserts, Flora and Fauna, Turkmenistan). Evolutionary and Conservation Studies of Imperiled Sturgeon Species of the Genus Pseudoscaphirhynchus in Central Asia.
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the wild populations. In the 1980s there were attempts of doing this with the Amu Darya sturgeon. Although some progress was made, captive breeding ultimately failed because the embryos died. Since 2010, Eurasian Regional Association  of Zoos and Aquariums (EARAZA) together with various Russian
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Studies in the 1960s and 1970s showed that Amu Darya sturgeon reach maturity when 5–8 years old (slightly later in females than males), but in the 1990s the youngest mature individuals only were 4 years old, possibly due to environmental changes in their habitat. The breeding season is from March to
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V.B. Sal’nikov, N.V. Akimova, G.I. Ruban, R.L. Mayden, B.R. Kuhajda. Reproductive System of Amu-Dar Shovelnoses - Big Shovelnose Pseudoscaphirhynchus kaufmanni and Little Shovelnose P. hermanni (Acipenseridae). Journal of Ichthyology, Vol. 43, No. 7, 2003, pp. 516–527. Translated from Voprosy
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C. B. Dillman, R. M. Wood, B. R. Kuhajda, J. M. Ray, V. B. Salnikov, R. L. Mayden.  Molecular systematics of Scaphirhynchinae: an assessment of North American and Central Asian Freshwater Sturgeon Species. Journal of Applied Ichthyology, 23 (2007), pp. 290–296:
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V.B. Sal’nikov, R.L. Mayden, B.R. Kuhajda. Tagging of the Big Amu-Dar Shovelnose Pseudoscaphirhynchus kaufmanni (Acipenseridae). Journal of Ichthyology, Vol. 44, No. 9, 2004, pp. 778–782. Translated from Voprosy Ikhtiologii, Vol. 44, No. 6, 2004, pp. 832–836:
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since 1998. This restricts international trade in the species, but two were legally exported from Uzbekistan to Russia for zoological purposes in 2002–2012, and in 2013 Uzbekistan set the export quota to twenty individuals.
2057: 369:(modern name is Turkmenabad) in Turkmenistan and also lower in Kyzylrabat area (Uzbekistan), also in more lower Amu Darya River (between Pitnak and Urganch in Khorezm province, Uzbekistan) and in the lower 696:
Salnikov, V.B.; V.J. Birstein; and R.L. Mayden (1996). The contemporary status of the two Amu Darya River shovelnose sturgeons, Pseudoscaphirhynchus kaufmanni and P. hermanni. The Sturgeon Quarterly 4(3):
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Review of species selected on the basis of new or increased CITES export quotas in 2013: Pseudoscaphirhynchus kaufmanni from Uzbekistan & update to the 2013 quota analysis
2135: 315:: a relatively large, light-coloured and late maturing morph, and a small, dark-coloured and early maturing morph. The small morph is roughly of similar size to 2174: 791: 2284: 597: 403: 1540: 645:
Birstein, V.J.; J.R. Waldman; and W.E. Bemis, editors (1997). Sturgeon biodiversity and conservation, pp. 377–378, 381–382. Kluwer Academic Publishing.
2109: 381:. Despite its threatened status, strong decline and range contraction, it can be locally fairly common and overall it is the least rare species of 2148: 666: 2187: 867: 786: 2279: 796: 840: 833: 2083: 797:
Large Amu Darya Shovelnose Sturgeon (Pseudoscaphirhynchus kaufmanni) in the lower Vakhsh River (an Amu Darya tributary) in Tadjikistan
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Kovalev, Konstantin; Balashov, Dmitry; Cherniak, Alexey; Lebedeva, Elena; Vasil’eva, Ekaterina; Vasil’ev, Victor (30 June 2014).
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In general the status of the Amu Darya sturgeon is poorly known and further surveys are necessary. A part of its range is in the
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Mikodina, E.; and A. Novosadova (2015). Rare Acipenserids in Russian Aquaculture. ВОПРОСЫ РЫБНОГО ХОЗЯЙСТВА БЕЛАРУСИ 31: 38–51.
1533: 2153: 808: 2269: 2259: 399: 54: 373:(an Amu Darya tributary) in Tajikistan. It has declined because of habitat loss, pollution and poaching, and is rated as 2274: 1504: 1498: 803: 2031: 817: 2179: 1526: 860: 809:
Large Amu Darya Shovelnose Sturgeon (Pseudoscaphirhynchus kaufmanni) in the middle Amu Darya River (Turkmenistan)
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Large Amu Darya Shovelnose Sturgeon (Pseudoscaphirhynchus kaufmanni) in the middle Amu Darya River (Uzbekistan)
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Large Amu Darya Shovelnose Sturgeon (Pseudoscaphirhynchus kaufmanni) in the lower Amu Darya River (Uzbekistan)
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The Amu Darya sturgeon feeds on small fish and aquatic insect larvae, with large individuals being mostly
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http://life-on-earth.ru/images/Lopatonosy-Turkmenistan/Molecular_systematics_of_Scaphirhynchinae.pdf
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http://life-on-earth.ru/images/Lopatonosy-Turkmenistan/Salnikov-Amudarya_Shovelnose_Sturgeon_Eng.pdf
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is widespread and fisheries management in the region is very poor. The species has been listed on
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Large Amu Darya Shovelnose Sturgeon (Pseudoscaphirhynchus kaufmanni) digital morphology
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Many sturgeon species have been bred in captivity and this often forms the basis for
402:. Although the Amu Darya sturgeon is a fully protected species throughout its range, 264: 59: 498: 345:, with the offspring having features that are intermediate between the two species. 2049: 1581: 1329: 1290: 1276: 1232: 818:
http://life-on-earth.ru/images/Salnikov-Amudarya_Shovelnose_Reproductive_System.pdf
452: 370: 268: 455:. Further karyological research on the Amu Darya sturgeon may help in determining 2218: 2122: 2016: 1587: 1006: 984: 958: 915: 876: 787:
Large Amu Darya Shovelnose Sturgeon (Pseudoscaphirhynchus kaufmanni) at FishBase
330: 280: 2007: 1575: 1317: 1144: 1123: 435:; it is classified as a low-chromosome group acipenserid fish. Studies of its 432: 299: 276: 272: 2088: 1949: 1607: 1406: 1239: 763: 742: 456: 428: 366: 354: 103: 543: 2096: 2001: 1925: 1597: 1569: 1397: 1027: 900: 675: 574: 436: 358: 153: 123: 2114: 2101: 1733: 827:
http://life-on-earth.ru/images/Salnikov-Amudarya_Shovelnose_Tagging.PDF
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The Amu Darya sturgeon is a small sturgeon, but the largest species of
2127: 283:. It inhabits quite shallow flowing waters that are turbid and muddy. 1563: 894: 113: 1978: 2213: 362: 290: 76: 70: 2075: 2192: 1793: 1433: 378: 1982: 1522: 887: 849: 492: 845: 490: 488: 486: 484: 482: 480: 478: 476: 474: 472: 361:, today it is found in the middle Amu Darya River (between 431:
of the Amu Darya sturgeon consists of roughly 118–120
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and karyotype show clear differences compared to the
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The Amu Darya sturgeon once occurred throughout the
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Copyright 2016, All Rights Reserved: 747:(Actinopterygii: Acipenseriformes: Acipenseridae)" 816:Ikhtiologii, Vol. 43, No. 4, 2003, pp. 499–510: 707: 705: 703: 692: 690: 688: 686: 641: 639: 637: 635: 633: 631: 629: 1534: 861: 522:10.2305/IUCN.UK.2010-1.RLTS.T18601A8498207.en 8: 2255:IUCN Red List critically endangered species 1979: 1920: 1602: 1541: 1527: 1519: 1313: 1187: 1016: 1012: 1001: 936: 927: 884: 868: 854: 846: 743:"The karyotype of the Amu Darya sturgeon, 721: 719: 717: 48: 29: 20: 762: 520: 357:river basin, including its delta in the 321:, a species that lacks a tail filament. 468: 395:only survives in very small numbers). 219: 7: 2285:Critically endangered fauna of Asia 508:IUCN Red List of Threatened Species 14: 1503: 1497: 1490: 751:Acta Ichthyologica et Piscatoria 605:Deeplyfish – fishes of the world 90: 459:evolution in acipenserid fish. 2063:pseudoscaphirhynchus-kaufmanni 2023:Pseudoscaphirhynchus kaufmanni 1993:Pseudoscaphirhynchus kaufmanni 745:Pseudoscaphirhynchus kaufmanni 669:Pseudoscaphirhynchus kaufmanni 568:Froese, R.; Pauly, D. (2017). 501:Pseudoscaphirhynchus kaufmanni 253:Pseudoscaphirhynchus kaufmanni 230:Pseudoscaphirhynchus rossikowi 196:Pseudoscaphirhynchus kaufmanni 1: 400:Amudarya State Nature Reserve 445:Scaphirhynchus platorhynchus 2311: 2280:Critically endangered fish 1558: 1487: 1190: 1019: 1015: 1000: 981: 939: 926: 883: 248:false shovelnose sturgeon 218: 211: 192: 185: 87:Scientific classification 85: 68: 46: 37: 28: 23: 1718:A. oxyrinchus oxyrinchus 665:; Pauly, Daniel (eds.). 391:is possibly extinct and 2265:Freshwater fish of Asia 1770:European sea sturgeon ( 1551:sturgeon and paddlefish 764:10.3750/AIP2014.44.2.04 260:species of fish in the 222:Scaphirhynchus hermanni 2290:Fish described in 1877 302: 2201:Paleobiology Database 1935:American paddlefish ( 1889:Shovelnose sturgeon ( 1709:A. oxyrinchus desotoi 731:UNEP-WCMC, Cambridge. 375:critically endangered 294: 258:critically endangered 55:Critically Endangered 2270:Fish of Central Asia 2260:Pseudoscaphirhynchus 1959:Chinese paddlefish ( 1856:Amu Darya sturgeon ( 1838:Syr Darya sturgeon ( 1626:Shortnose sturgeon ( 1461:Pseudoscaphirhynchus 614:on 18 September 2017 544:"Appendices | CITES" 515:: e.T18601A8498207. 383:Pseudoscaphirhynchus 308:Pseudoscaphirhynchus 165:Pseudoscaphirhynchus 2275:Fauna of Tajikistan 1716:Atlantic sturgeon ( 1689:Adriatic sturgeon ( 1680:Japanese sturgeon ( 1671:Sakhalin sturgeon ( 1617:Siberian sturgeon ( 1454:Protoscaphirhynchus 725:UNEP-WCMC. (2013). 679:. May 2019 version. 441:shovelnose sturgeon 349:Conservation status 298:on a 1996 stamp of 40:Conservation status 24:Amu Darya sturgeon 1898:Alabama sturgeon ( 1752:Chinese sturgeon ( 1725:Persian sturgeon ( 1698:Bastard sturgeon ( 1655:A. gueldenstaedtii 1653:Russian sturgeon ( 1635:Dabry's sturgeon ( 1071:Bobasatraniiformes 497:Mugue, N. (2010). 303: 244:Amu Darya sturgeon 202:Bogdanov 1874 ex. 2242: 2241: 1985:Taxon identifiers 1976: 1975: 1972: 1971: 1910: 1909: 1880:Pallid sturgeon ( 1761:Starry sturgeon ( 1516: 1515: 1512: 1511: 1485: 1484: 1481: 1480: 1477: 1476: 1175: 1174: 1093:Saurichthyiformes 1082:Guildayichthyidae 996: 995: 992: 991: 977: 976: 577:version (02/2017) 408:CITES Appendix II 267:. It is found in 240: 239: 234: 226: 178:P. kaufmanni 80: 63: 2302: 2235: 2234: 2222: 2221: 2209: 2208: 2196: 2195: 2183: 2182: 2170: 2169: 2157: 2156: 2144: 2143: 2131: 2130: 2118: 2117: 2105: 2104: 2092: 2091: 2079: 2078: 2066: 2065: 2053: 2052: 2040: 2039: 2027: 2026: 2025: 2012: 2011: 2010: 1980: 1921: 1847:Dwarf sturgeon ( 1781:A. transmontanus 1779:White sturgeon ( 1682:A. multiscutatus 1662:Green sturgeon ( 1603: 1543: 1536: 1529: 1520: 1507: 1501: 1495: 1494: 1451: 1441: 1424: 1414: 1384: 1374: 1364: 1347: 1337: 1327: 1314: 1259: 1222: 1207: 1196: 1188: 1182:Acipenseriformes 1152:Plesiococcolepis 1106: 1090: 1079: 1068: 1058: 1047: 1036: 1025: 1017: 1013: 1002: 937: 928: 921: 920: 885: 870: 863: 856: 847: 769: 768: 766: 738: 732: 730: 723: 712: 709: 698: 694: 681: 680: 659: 653: 643: 624: 623: 621: 619: 613: 607:. Archived from 602: 594: 588: 587: 585: 583: 565: 559: 558: 556: 554: 540: 534: 533: 531: 529: 524: 494: 449:Scaphirhynchinae 233:Nikolskii 1900 232: 224: 198: 144:Acipenseriformes 95: 94: 74: 57: 52: 51: 33: 21: 2310: 2309: 2305: 2304: 2303: 2301: 2300: 2299: 2245: 2244: 2243: 2238: 2230: 2225: 2217: 2212: 2204: 2199: 2191: 2186: 2178: 2173: 2165: 2160: 2152: 2147: 2139: 2134: 2126: 2121: 2113: 2108: 2100: 2095: 2087: 2082: 2074: 2069: 2061: 2056: 2048: 2043: 2035: 2030: 2021: 2020: 2015: 2006: 2005: 2000: 1987: 1977: 1968: 1943: 1906: 1891:S. platorynchus 1864: 1840:P. fedtschenkoi 1828: 1820: 1787: 1743:Amur sturgeon ( 1707:Gulf sturgeon ( 1644:Lake sturgeon ( 1628:A. brevirostrum 1592: 1554: 1547: 1517: 1508: 1489: 1473: 1392: 1303: 1252: 1215: 1199:Cylindracanthus 1184: 1171: 1099: 1009: 988: 973: 953: 922: 890: 889: 879: 874: 778: 773: 772: 740: 739: 735: 726: 724: 715: 710: 701: 695: 684: 661: 660: 656: 644: 627: 617: 615: 611: 600: 598:"Acipenseridae" 596: 595: 591: 581: 579: 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340: 334: 332: 324: 322: 320: 319: 314: 310: 309: 301: 297: 293: 286: 284: 282: 278: 274: 270: 266: 265:Acipenseridae 263: 259: 255: 254: 249: 245: 231: 228: 223: 220: 217: 214: 210: 205: 199: 197: 191: 188: 187:Binomial name 184: 180: 179: 174: 171: 170: 167: 166: 162: 159: 158: 155: 154:Acipenseridae 152: 149: 148: 145: 142: 139: 138: 135: 132: 129: 128: 125: 122: 119: 118: 115: 112: 109: 108: 105: 102: 99: 98: 93: 88: 84: 78: 72: 67: 61: 56: 45: 41: 36: 32: 27: 22: 19: 1992: 1960: 1948: 1936: 1924: 1899: 1890: 1881: 1869: 1858:P. kaufmanni 1857: 1855: 1848: 1839: 1825: 1813: 1804: 1792: 1780: 1771: 1763:A. stellatus 1762: 1753: 1744: 1735: 1726: 1717: 1708: 1699: 1690: 1681: 1672: 1663: 1654: 1645: 1637:A. dabryanus 1636: 1627: 1618: 1606: 1582:Osteichthyes 1496: 1466: 1459: 1452: 1442: 1432: 1425: 1415: 1405: 1385: 1375: 1365: 1355: 1348: 1338: 1330:Crossopholis 1328: 1296: 1291:Stichopterus 1289: 1282: 1277:Peipiaosteus 1275: 1268: 1245: 1238: 1233:Chondrosteus 1231: 1208: 1197: 1164: 1157: 1150: 1143: 1136: 1129: 1122: 1115: 1091: 1080: 1069: 1059: 1048: 1039:Errolichthys 1037: 1026: 983: 911: 754: 750: 744: 736: 674: 668: 657: 616:. Retrieved 609:the original 604: 592: 580:. Retrieved 573: 563: 551:. Retrieved 547: 538: 526:. Retrieved 512: 506: 500: 453:polyphyletic 444: 426: 413: 397: 392: 386: 382: 371:Vakhsh River 352: 342: 335: 328: 316: 306: 304: 296:P. kaufmanni 295: 279:and perhaps 269:Turkmenistan 252: 251: 247: 243: 241: 229: 221: 195: 193: 177: 176: 164: 18: 2123:iNaturalist 2017:Wikispecies 1937:P. spathula 1900:S. suttkusi 1849:P. hermanni 1805:H. dauricus 1754:A. sinensis 1736:A. ruthenus 1727:A. persicus 1691:A. naccarii 1588:Chondrostei 1580:Superclass 1284:Spherosteus 1131:Condorlepis 1061:Neochallaia 1007:Chondrostei 985:Chondrostei 959:Chondrostei 916:Actinopteri 877:Chondrostei 528:17 November 433:chromosomes 393:P. hermanni 343:P. hermanni 331:piscivorous 318:P. hermanni 281:Afghanistan 73:Appendix II 2249:Categories 1961:P. gladius 1673:A. mikadoi 1576:Vertebrata 1574:Subphylum 1145:Morrolepis 1124:Coccolepis 1117:Barbalepis 1050:Gualolepis 968:see below↓ 553:14 January 463:References 416:restocking 300:Kyrgyzstan 287:Appearance 277:Tajikistan 273:Uzbekistan 2295:Amu Darya 1950:Psephurus 1772:A. sturio 1734:Sterlet ( 1619:A. baerii 1608:Acipenser 1586:Subclass 1407:Acipenser 1377:Psephurus 1298:Yanosteus 1270:Liaosteus 1240:Gyrosteus 1159:Sunolepis 893:Kingdom: 548:cites.org 457:polyploid 429:karyotype 367:Chardzhou 355:Amu Darya 339:hybridize 172:Species: 110:Kingdom: 104:Eukaryota 2214:Species+ 2141:10154851 2097:FishBase 2076:46561193 2008:Q1507886 2002:Wikidata 1926:Polyodon 1882:S. albus 1827:Pseudo- 1812:Beluga ( 1803:Kaluga ( 1570:Chordata 1564:Animalia 1562:Kingdom 1357:Polyodon 1138:Iyalepis 1028:Birgeria 901:Chordata 899:Phylum: 895:Animalia 676:FishBase 575:FishBase 437:genetics 423:Taxonomy 359:Aral Sea 325:Behavior 213:Synonyms 150:Family: 124:Chordata 120:Phylum: 114:Animalia 100:Domain: 60:IUCN 3.1 2115:2402094 1814:H. huso 1568:Phylum 1553:species 1549:Recent 905:Class: 377:by the 256:) is a 204:Kessler 160:Genus: 140:Order: 130:Class: 75: ( 58: ( 2232:282474 2193:282474 2154:573258 2128:111095 697:10–14. 649:  618:18 May 582:18 May 313:morphs 262:family 2227:WoRMS 2206:94899 2180:55290 2167:18601 2136:IRMNG 2089:17197 2084:EUNIS 2050:6WH8D 2037:50214 912:Clade 612:(PDF) 601:(PDF) 363:Kerki 341:with 77:CITES 71:CITES 2219:4111 2188:OBIS 2175:NCBI 2162:IUCN 2149:ITIS 2110:GBIF 2102:4634 2032:BOLD 1794:Huso 1434:Huso 945:see 647:ISBN 620:2017 584:2017 555:2022 530:2021 513:2010 427:The 379:IUCN 365:and 242:The 206:1877 2071:EoL 2058:CMS 2045:CoL 759:doi 517:doi 451:is 246:or 2251:: 2229:: 2216:: 2203:: 2190:: 2177:: 2164:: 2151:: 2138:: 2125:: 2112:: 2099:: 2086:: 2073:: 2060:: 2047:: 2034:: 2019:: 2004:: 914:: 755:44 753:. 749:. 716:^ 702:^ 685:^ 673:. 628:^ 603:. 572:. 546:. 511:. 505:. 471:^ 333:. 275:, 271:, 1965:† 1963:) 1939:) 1902:) 1893:) 1884:) 1860:) 1851:) 1842:) 1816:) 1807:) 1783:) 1774:) 1765:) 1756:) 1747:) 1738:) 1729:) 1720:) 1711:) 1702:) 1693:) 1684:) 1675:) 1666:) 1657:) 1648:) 1639:) 1630:) 1621:) 1542:e 1535:t 1528:v 1450:† 1440:† 1423:† 1413:† 1383:† 1373:† 1363:† 1346:† 1336:† 1326:† 1258:† 1221:† 1206:† 1202:? 1195:† 1105:† 1096:? 1089:† 1085:? 1078:† 1074:? 1067:† 1057:† 1053:? 1046:† 1042:? 1035:† 1031:? 1024:† 869:e 862:t 855:v 767:. 761:: 671:" 667:" 622:. 586:. 557:. 532:. 519:: 503:" 499:" 443:( 385:( 250:( 79:) 62:)

Index


Conservation status
Critically Endangered
IUCN 3.1
CITES
CITES
Scientific classification
Edit this classification
Eukaryota
Animalia
Chordata
Actinopterygii
Acipenseriformes
Acipenseridae
Pseudoscaphirhynchus
Binomial name
Kessler
Synonyms
critically endangered
family
Acipenseridae
Turkmenistan
Uzbekistan
Tajikistan
Afghanistan

Kyrgyzstan
Pseudoscaphirhynchus
morphs
P. hermanni

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