Tokyo bitterling

The Tokyo bitterling (Tanakia tanago) is a temperate freshwater fish of the carp family (Cyprinidae). Taxonomically, it belongs to the subfamily Acheilognathinae.

Tokyo bitterling
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Cypriniformes
Family: Cyprinidae
Genus: Tanakia
Species:
T. tanago
Binomial name
Tanakia tanago
S. Tanaka, 1909
Synonyms
  • Rhodeus tanago Tanaka, 1909
  • Pseudorhodeus tanago Tanaka, 1909

The species was first described as Rhodeus tanago by Shigeho Tanaka in 1909. It is widely known as Tanakia tanago,[2] although a 2014 study suggests it is genetically distinct from other Tanakia species, and warrants placement it the monotypic genus Pseudorhodeus.[3]

Distribution

In the wild, this fish is found only on the Kantō Plain of Japan, an area near the capital city, Tokyo. The fish was formerly abundant in small streams, but its habitat has been overrun by people and pollution.

Threats

There is a real risk that it could become extinct in the wild. It also suffers from competition from the related but more aggressive rosy bitterling. Bitterlings lay their eggs in freshwater mussel shells. The Tokyo bitterling lays its eggs in only one type of mussel shell, limiting its chances of successful breeding. To help protect the fish, it has been declared a "national monument" by the Japanese government, and this gives it special protection.[4]

References
  1. Hasegawa, K.; Kanao, S.; Miyazaki, Y.; Mukai, T.; Nakajima, J.; Takaku, K.; Taniguchi, Y. (2019). "Tanakia tanago". IUCN Red List of Threatened Species. 2019: e.T21383A110464790. doi:10.2305/IUCN.UK.2019-2.RLTS.T21383A110464790.en. Retrieved 18 November 2021.
  2. Tanakia tanago. Catalog of Fishes. California Academy of Sciences Archived 2014-10-06 at the Wayback Machine. 27 August 2014. accessed 4 Oct 2014
  3. Chang, C.-H.; Li, F.; Shao, K.-T.; Lin, Y.-S.; Morosawa, T.; Kim, S.; Koo, H.; Kim, W.; Lee, J.-S.; He, S.; Smith, C.; Reichard, M.; Miya, M.; Sado, T.; Uehara, K.; Lavoué, S.; Chen, W.-J. & Mayden, R.L. (2014). "Phylogenetic relationships of Acheilognathidae (Cypriniformes: Cyprinoidea) as revealed from evidence of both nuclear and mitochondrial gene sequence variation: Evidence for necessary taxonomic revision in the family and the identification of cryptic species". Molecular Phylogenetics and Evolution. 81: 182–194. doi:10.1016/j.ympev.2014.08.026. PMID 25238947.
  4. ミヤコタナゴ [Tokyo bitterling] (in Japanese). Ministry of the Environment. Archived from the original on 27 September 2021. Retrieved 3 October 2022.
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.