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Pseudoscaphirhynchus hermanni (Kessler, 1877)
DWARF STURGEON
Life   Vertebrata   Fish   Acipenseridae   Pseudoscaphirhynchus

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Common name (e.g. trout)

Genus + Species (e.g. Gadus morhua)

Pseudoscaphirhynchus hermanni (Kessler , 1877)

Dwarf sturgeon Upload your photos  and  videos
Pictures | Google image Image of Pseudoscaphirhynchus hermanni (Dwarf sturgeon) Pseudoscaphirhynchus hermanni
Female 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: milieu / climate zone / depth range / distribution range Ecology

Freshwater; brackish; demersal; potamodromous (Ref. 51243 ).   Temperate

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

Former USSR and Asia: Endemic to the basin of Amu Dariya and Sir Dariya rivers (Ref. 35930 ). Considered endangered or extinct by authors (Ref. 6866 ). Registered in the International trade restricted ( CITES II, since 1.4.98; CMS Appendix II); 1984 USSR Red Book; 1985 Turkmen SSR Red Data Book; 1996 IUCN Red List; and, 1997 CITES Lists (Ref. 35930 ).

Size / Weight / Age

Maturity: L m   ?   range ? - ? cm
Max length : 27.5 cm TL male/unsexed; (Ref. 35930 ); max. published weight: 50.50 g (Ref. 35930 ); max. reported age: 6 years (Ref. 35930 )

Biology     Glossary (e.g. epibenthic)

A rare and endangered species; smallest sturgeon; sensitive to chemicals in the water Ref. 35930).

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

Main reference Upload your references | References | Coordinator | Collaborators

Robins, C.R., R.M. Bailey, C.E. Bond, J.R. Brooker, E.A. Lachner, R.N. Lea and W.B. Scott , 1991. World fishes important to North Americans. Exclusive of species from the continental waters of the United States and Canada. Am. Fish. Soc. Spec. Publ. (21):243 p. (Ref. 4537 )

IUCN Red List Status (Ref. 120744 )

  Critically Endangered (CR)  (A2c); Date assessed: 24 October 2009

CITES (Ref. 118484 )

Appendix II: International trade monitored

CMS (Ref. 116361 )

Appendix II: Migratory species conserved through agreements

Threat to humans

  Harmless




Human uses

Fisheries: of no interest FAO(fisheries: species profile ; publication : search ) | FishSource |

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Summary page | Point data | Common names | Photos

Internet sources

Aquatic Commons | BHL | Cloffa | Websites from users | Check FishWatcher | CISTI | Catalog of Fishes ( gen. , sp. ) | DiscoverLife | ECOTOX | Faunafri | Fishtrace | GenBank( genome , nucleotide ) | GloBI | Google Books | Google Scholar | Google | IGFA World Record | MitoFish | Otolith Atlas of Taiwan Fishes | PubMed | Reef Life Survey | Tree of Life | Wikipedia( Go , Search ) | World Records Freshwater Fishing | Zoological Record

Estimates based on models

Phylogenetic diversity index (Ref. 82805 ):  PD 50 = 0.6250   [Uniqueness, from 0.5 = low to 2.0 = high]. Bayesian length-weight: a=0.00324 (0.00144 - 0.00729), b=3.16 (2.98 - 3.34), in cm Total Length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245 ). Trophic Level (Ref. 69278 ):  3.2   ±0.5 se; Based on size and trophs of closest relatives Resilience (Ref. 120179 ):  Medium, minimum population doubling time 1.4 - 4.4 years (tmax=6). Vulnerability (Ref. 59153 ):  Low to moderate vulnerability (30 of 100) .

Entered by Froese, Rainer Modified by Capuli, Estelita Emily Fish Forum
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