Pontic shad

The Pontic shad (Alosa immaculata, previously Alosa pontica), also referred to as the Black Sea shad or Kerch shad, is a species of clupeid fish in the genus Alosa, native to the Black Sea and Sea of Azov basins.[2][3]

Pontic shad
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Clupeiformes
Family: Clupeidae
Genus: Alosa
Species:
A. immaculata
Binomial name
Alosa immaculata
Synonyms[1]

Alosa pontica (Eichwald, 1838)

Distribution

Alosa immaculata lives in the Black Sea and Sea of Azov, and adults migrate up rivers to spawn.[1] It may also be found in the Marmara Sea in Turkey.[4] It currently migrates up and spawns in six rivers: the Danube, Dnieper, Dniester, Southern Bug, Don and Kuban Rivers. Previously the migrations reached far upstream, up to 1,600 in Danube and 900 km in Don, now dams are restricting the migrations. There is also a landlocked population in Don.[1]

Life cycle

Alosa immaculata are anadromous. Spawning occurs between the warmer months of May and August. It has a pelagic life and prefers to feed on small fishes and crustaceans.[4]

Conservation

Although the species used to migrate as far upstream as the Mohács (Hungary) in the Danube, the building of dams has limited the species. It is now regionally extinct in Hungary.[1] Excessive fishing and pollution may also be responsible for their decline.[4]

References
  1. Freyhof, J. & Kottelat, M. (2008). "Alosa immaculata". The IUCN Red List of Threatened Species. IUCN. 2008: e.T907A13093654. doi:10.2305/IUCN.UK.2008.RLTS.T907A13093654.en. Retrieved 27 December 2017.
  2. Froese, Rainer and Pauly, Daniel, eds. (2006). "Alosa immaculata" in FishBase. April 2006 version.
  3. A. pontica (Eichwald,1838) - черноморско-азовская проходная сельдь Позвоночные животные России. sevin.ru
  4. Yılmaz, Savaş, and Nazmi Polat. Length-Weight Relationship and Condition Factor of Pontic Shad, Alosa Immaculata (Pisces: Clupeidae) From the Southern Black Sea. Research Journal of Fisheries and Hydrobiology 6.2 (2011): 49-53.


This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.