Pseudoscaphirhynchus kaufmanni, Amu Darya sturgeon : fisheries

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.

Classificatie / Names Populaire namen | Synoniemen | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa

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

Environment: milieu / climate zone / depth range / distribution range Ecologie

; zoetwater; brakwater demersaal; potamodroom (Ref. 51243); diepteverspreiding 1 - 2 m (Ref. 109751).   Temperate; 10°C - 20°C (Ref. 2059)

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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).

Length at first maturity / Size / Gewicht / Leeftijd

Maturity: Lm 45.0  range ? - ? cm
Max length : 75.0 cm TL mannelijk/geslacht niet bekend; (Ref. 593); Maximaal gepubliceerd gewicht: 2.0 kg (Ref. 593)

Biologie     Verklarende woordenlijst (b.v. 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 Geslachtsrijpheid | Voortplanting | Kuitschieten | Eieren | Fecundity | Larven

Voornaamste referentie Upload your references | Referenties | Coördinator | Medewerkers

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)

Status op de Rode Lijst van het IUCN (Ref. 123251)

  Ernstig bedreigd (CR) (A2c); Date assessed: 24 October 2009

CITES (Ref. 118484)


Gevaarlijk voor mensen

  Harmless





Gebruik door de mens

Visserij: commercieel
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Estimates based on models

Phylogenetic diversity index (Ref. 82805):  PD50 = 0.6250   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00324 (0.00146 - 0.00716), b=3.16 (2.97 - 3.35), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245).
Trophic level (Ref. 69278):  3.4   ±0.3 se; based on diet studies.
Generation time: 6.7 ( na - na) years. Estimated as median ln(3)/K based on 1 growth studies.
Weerstandsvermogen (Ref. 120179):  laag, minimale populatieverdubbelingstijd 4,5-14 jaar (K=0.16; tm=6-7).
Kwetsbaarheid (Ref. 59153):  High vulnerability (55 of 100) .
Prijsklasse (Ref. 80766):   Unknown.