Biology:Salvelinus grayi

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Short description: Species of fish

Salvelinus grayi
A history of the fishes of the British Islands (1862) (14776378792).jpg
Scientific classification edit
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Salmoniformes
Family: Salmonidae
Genus: Salvelinus
Species:
S. grayi
Binomial name
Salvelinus grayi
Günther, 1862[2]
Synonyms

Salmo grayi (Günther, 1862)[3]
Salvelinus evasus (Freyhof & Kottelat, 2005)

Salvelinus grayi, also called Gray's char[r], Lough Melvin char[r] or freshwater herring,[4][5] is a species of lacustrine char in the family Salmonidae.[6][7]

It is only found in Lough Melvin, Ireland;[8] numbers of fish are declining and the species is considered critically endangered by the International Union for Conservation of Nature. Lua error in Module:Location_map at line 522: Unable to find the specified location map definition: "Module:Location map/data/Northern Ireland" does not exist.

Taxonomy

Name

The describer, Albert Günther, named the fish after his longtime colleague John Edward Gray. The English word "char[r]" is thought to derive from Old Irish ceara/cera meaning "[blood] red,"[9] referring to its pink-red underside.[10][11] This would also connect with its Welsh name torgoch, "red belly."[12]

Description

This species grows to an average length of 10 to 12 in (25 to 30 cm) and a weight of 8 ounces (230 g). Compared to other members of the Salvelinus genus, it has a deeper body that is more laterally compressed, a shorter caudal peduncle and larger scales.[13] It can be distinguished from other char by the whitish spots on upper flank and caudal and dorsal fins.[14]

Biology

Salvelinus grayi is benthopelagic, living at 10–30 m (30–100 ft), except during the spawning season. It feeds on water fleas (crustaceans of the order Cladocera). It spawns in November, in shallow rocky areas.[14]

Conservation

Recorded numbers in Lough Melvin declined from 33 in 1975 and 42 in 1986, to only 12 in 2001, and the species is considered critically endangered. Common rudd introduction and eutrophication are blamed for the decline. In 2003, a plan to relocate some of the fish to a nearby reservoir failed when no fish could be found despite extensive search. Nor was the fish observed to be spawning in its traditional spawning locations. The lake has experienced increasing levels of phosphorus as a result of agricultural activities in its catchment area, and char are notoriously sensitive to phosphorus. Another factor in the fish's decline may be the introduction into the lake of rudd and roach.[1]

References

  1. ↑ 1.0 1.1 Freyhof, J.; Kottelat, M. (2008). "Salvelinus grayi". IUCN Red List of Threatened Species 2008: e.T135413A4126003. doi:10.2305/IUCN.UK.2008.RLTS.T135413A4126003.en. https://www.iucnredlist.org/species/135413/4126003. Retrieved 13 November 2021. 
  2. ↑ "WoRMS - World Register of Marine Species - Salvelinus grayi (Günther, 1862)". http://www.marinespecies.org/aphia.php?p=taxdetails&id=1021130. 
  3. ↑ Couch, Jonathan (28 February 1877). A History of the Fishes of the British Islands. G. Bell. p. 263. https://archive.org/details/historyfishesbr4couc. "Gray's Char." 
  4. ↑ Thompson, Wm. (1841). "Notes on British Char, Salmo Umbla, Linn., S. Salvelinus, Don.". The Annals and Magazine of Natural History: Including Zoology, Botany, and Geology (R. and J. E. Taylor) 6: 444. https://books.google.com/books?id=14E5AAAAcAAJ&q=%22freshwater+herring%22+melvin&pg=PA444. 
  5. ↑ MacMahon, Alexander Francis Magri (28 February 2018). "Fishlore: British Freshwater Fishes". Penguin Books. https://books.google.com/books?id=GpE_AAAAYAAJ&q=%22Gray's+Char%22. 
  6. ↑ Thompson, Wm. (1841). "Notes on British Char, Salmo Umbla, Linn., S. Salvelinus, Don.". The Annals and Magazine of Natural History: Including Zoology, Botany, and Geology (R. and J. E. Taylor) 6: 446. https://books.google.com/books?id=14E5AAAAcAAJ&q=%22melvin+Char%22&pg=PA446. 
  7. ↑ "The Salmon and Trout Magazine". Salmon and Trout Assoc.. 28 February 2018. https://books.google.com/books?id=BB30AAAAMAAJ&q=%22melvin+Char%22. 
  8. ↑ "The Salmon and Trout Magazine". Salmon and Trout Assoc.. 28 February 1964. https://books.google.com/books?id=FCH0AAAAMAAJ&q=%22Gray's+Char%22. 
  9. ↑ "Search term: ? 2 cera". eDIL - Irish Language Dictionary. http://edil.qub.ac.uk/8734. 
  10. ↑ Skeat, Walter W. (15 February 2013). An Etymological Dictionary of the English Language. Courier Corporation. ISBN 9780486317656. https://books.google.com/books?id=jeeGAAAAQBAJ&q=cierran+char&pg=PA103. 
  11. ↑ Chambers's Twentieth Century Dictionary (part 1 of 4: A-D). Library of Alexandria. ISBN 9781465562883. https://books.google.com/books?id=gxU39E56bvIC&pg=PT578. 
  12. ↑ Weekley, Ernest (5 March 2013). An Etymological Dictionary of Modern English. Courier Corporation. ISBN 9780486122878. https://books.google.com/books?id=fj_CAgAAQBAJ&q=cierran+char+fish&pg=RA1-PA282. 
  13. ↑ Jenkins, J. Travis (1925). The Fishes of the British Isles. Frederick Warne & Co.. pp. 238–239. 
  14. ↑ 14.0 14.1 "Salvelinus grayi summary page". http://www.fishbase.org/summary/Salvelinus-grayi.html. 

Wikidata ☰ Q6431271 entry



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