(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
; acqua dolce; salmastro demersale; potamodromo (Ref. 51243); distribuzione batimetrica 1 - 2 m (Ref. 109751). Temperate; 10°C - 20°C (Ref. 2059)
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 / Peso / Age
Maturity: Lm 45.0  range ? - ? cm
Max length : 75.0 cm TL maschio/sesso non determinato; (Ref. 593); peso massimo pubblicato: 2.0 kg (Ref. 593)
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
Maturità | Riproduzione | Deposizione | Uova | Fecundity | Larve
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. 123251)
Threat to humans
BibliografiaAcquacolturaProfilo di acquacolturaVarietàGeneticaFrequenze allelicheEreditarietàMalattieElaborazioneNutrientsMass conversion
Estimates based on models
Phylogenetic diversity index (Ref. 82805
= 0.6250 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00324 (0.00144 - 0.00726), 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.
Resilienza (Ref. 120179
): Basso, tempo minimo di raddoppiamento della popolazione 4.5 - 14 anni (K=0.16; tm=6-7).
Vulnerability (Ref. 59153
): High vulnerability (55 of 100) .