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Pseudoscaphirhynchus kaufmanni  (Kessler, 1877)

Amu Darya sturgeon
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Image of Pseudoscaphirhynchus kaufmanni (Amu Darya sturgeon)
Pseudoscaphirhynchus kaufmanni
Picture by Salnikov, V.B.

Classification / Names Common names | Synonyms | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa

Actinopterygii (ray-finned fishes) > Acipenseriformes (Sturgeons and paddlefishes) > Acipenseridae (Sturgeons) > Acipenserinae
Etymology: Pseudoscaphirhynchus: Greek, pseudes = false + Greek, skaphe = boat + Greek, rhyngchos = snout (Ref. 45335).

Environment / Climate / Range Ecology

Freshwater; brackish; demersal; potamodromous (Ref. 51243).   Temperate; 10°C - 20°C (Ref. 2059)

Length at first maturity / Size / Weight / Age

Maturity: Lm 45.0  range ? - ? cm
Max length : 75.0 cm TL male/unsexed; (Ref. 593); max. published weight: 2.0 kg (Ref. 593)

Distribution Countries | FAO areas | Ecosystems | Occurrences | Point map | Introductions | Faunafri

Asia: Former USSR: Amu Darya River from the Pyandzh to the mouths and lower tributaries. Sometimes in the brackish water of Taldyk Bay, the delta of the Amu Darya in the Aral Sea. Considered close to extinction (Ref. 6866). International trade restricted (CITES II, since 1.4.98; CMS Appendix II). Registered in the 1984 USSR Red Book; 1985 Turkmen SSR Red Data Book; 1996 IUCN Red List; an d1997 CITES Lists (Ref. 35930).

Biology     Glossary (e.g. epibenthic)

Its natural habitat and population have declined due to the breakage of the hydrological regime of the Amu Dariya River. Usual weight not more than 600-700 grams. Females with mature hard roe, very rare. Apparently sensitive to oxygen content in the water, changes in its chemical content, and to pollution. Fishing is prohibited (Ref. 35930). Spawns at 16° C (Ref. 719).

Life cycle and mating behavior Maturity | Reproduction | Spawning | Eggs | Fecundity | Larvae

Main reference Upload your references | References | Coordinator | Collaborators

Berg, L.S., 1962. Freshwater fishes of the U.S.S.R. and adjacent countries. volume 1, 4th edition. Israel Program for Scientific Translations Ltd, Jerusalem. (Russian version published 1948). (Ref. 593)

IUCN Red List Status (Ref. 96402)

CITES (Ref. 94142)

Threat to humans

  Harmless




Human uses

Fisheries: commercial
FAO(fisheries: species profile; publication : search) | FisheriesWiki | Sea Around Us

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Internet sources

BHL | Cloffa | Websites from users | Check FishWatcher | CISTI | Catalog of Fishes (gen., sp.) | DiscoverLife | Faunafri | Fishtrace | GenBank(genome, nucleotide) | GOBASE | Google Books | Google Scholar | Google | IGFA World Record | iSpecies | PubMed | Scirus | SeaLifeBase | Tree of Life | uBio | Wikipedia(Go, Search) | World Records Freshwater Fishing | Zoological Record

Estimates of some properties based on models

Phylogenetic diversity index (Ref. 82805):  PD50 = 0.6250   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00295 (0.00131 - 0.00665), b=3.20 (3.01 - 3.39), based on LWR estimates for this Subfamily-body shape (Ref. 93245).
Trophic Level (Ref. 69278):  3.1   ±0.4 se; Based on diet studies.
Resilience (Ref. 69278):  Low, minimum population doubling time 4.5 - 14 years (K=0.16; tm=6-7).
Vulnerability (Ref. 59153):  High vulnerability (55 of 100) .
Price category (Ref. 80766):   Unknown.