Dabry's sturgeon

Source: Wikipedia, the free encyclopedia.

Dabry's sturgeon

Extinct in the Wild  (IUCN 3.1)[1]
CITES Appendix II (CITES)[2]
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Acipenseriformes
Family: Acipenseridae
Genus: Acipenser
Species:
A. dabryanus
Binomial name
Acipenser dabryanus
Duméril, 1869
Synonyms[3][4]
  • Sinosturio dabryanus (Duméril 1869)

Dabry's sturgeon (Acipenser dabryanus), also known as the Yangtze sturgeon, Changjiang sturgeon and river sturgeon, is a species of fish in the

IUCN as of July 21, 2022.[1]

Appearance

This sturgeon has been known to reach 2.5 m (8.2 ft) in length, but it is usually much smaller.[8] Its body is blue-gray above and yellowish white on the belly, with five rows of scutes. The head is triangular and the snout is long with the mouth located on the underside. There are two pairs of barbels.[9]

Behavior

The fish lives in slow-moving river waters over substrates of sand and mud. It feeds on aquatic plants, invertebrates, and small fish. This species is potamodromous, taking part in a migration, but never leaving fresh water.[9] It spawns in the upper Yangtze, mainly during March and April, and sometimes around November and December. Males spawn each year, but most females do not. The female produces 57,000 to 102,000 eggs.[9]

Conservation status

This was once a common fish in the Yangtze system.

overharvesting of juveniles. The construction of dams, notably the Gezhouba Dam and Three Gorges Dam, blocked the movement of the fish along the river, restricting it to the upper reaches. It also caused habitat fragmentation and degradation. Increased development and deforestation on land near the river has increased pollution from wastewater and runoff.[1] The Yangtze basin is and was its main range, but it has also been found in the Yellow River basin, with the last records in the 1960s.[6][7]

The fish has been bred in captivity since the 1970s. Thousands of individuals have been released into the Yangtze basin, but are apparently not breeding. Nevertheless, this restocking may be the only effort preventing the extinction of the species.[1]

Wuhan Institute of Hydrobiology

See also

References

Wikimedia Commons has media related to Acipenser dabryanus.
Wikispecies has information related to Acipenser dabryanus.
  1. ^
    doi:10.2305/IUCN.UK.2022-1.RLTS.T231A61462199.en
    . Retrieved 21 July 2021.
  2. ^ "Appendices | CITES". cites.org. Geneva, Switzerland: CITES Secretariat. Archived from the original on 5 December 2017.
  3. ^ Froese, R.; Pauly, D. (2017). "Acipenseridae". FishBase version (02/2017). Retrieved 18 May 2017.
  4. ^ "Acipenseridae" (PDF). Deeplyfish- fishes of the world. Retrieved 18 May 2017.
  5. ^ a b Zhuang, P., et al. (1997). Biology and life history of Dabry's sturgeon, Acipenser dabryanus, in the Yangtze River. Environmental Biology of Fishes 48(1-4), 257-64.
  6. ^
    PMID 29721289
    .
  7. ^
    ISBN 9789578596771
    .
  8. ^ Froese, R. and D. Pauly. (Eds.) Acipenser dabryanus. FishBase. 2011.
  9. ^ a b c d Gao, X., et al. (2009). Threatened fishes of the world: Acipenser dabryanus Duméril, 1869. Environmental Biology of Fishes 85(2), 117-18.
Retrieved from "https://en.wikipedia.org/w/index.php?title=Dabry%27s_sturgeon&oldid=1186788161"