Salvelinus obtusus explained

Salvelinus obtusus, commonly called the blunt-nosed Irish charr[1] or blunt-snouted Irish char,[2] is a species of lacustrine char fish in the family Salmonidae, found in the Lakes of Killarney, Ireland.[3]

Taxonomy

Name

The English word "char[r]" is thought to derive from Old Irish ceara/cera meaning "[blood] red,"[4] referring to its pink-red underside.[5] [6] This would also connect with its Welsh name torgoch, "red belly."[7]

The species name obtusus is Latin for "blunt."

Biology

Salvelinus obtusus is benthopelagic and can grow up to 18cm (07inches). It is distinguished from other Salvelinus in Ireland by its obtuse snout, rounded dorsal profile and short lower jaw, which is included in the upper jaw when the mouth is closed.[8] Its body depth is 20–25% of snout length.[9] [10]

Range

Salvelinus obtusus is only found in Muckross Lake and Lough Leane, and is threatened by eutrophication.

It was formerly found in Lough Tay, Lough Dan,[11] [12] Lough Nalughraman and Lough Acoose,[13] but is now considered extirpated at those sites and is critically endangered.[14]

Notes and References

  1. Web site: Blunt-nosed Irish charr (Salvelinus obtusus) - Pictures and facts - Fish @ thewebsiteofeverything.com. thewebsiteofeverything.com.
  2. Web site: Fishlore: British Freshwater Fishes. Alexander Francis Magri. MacMahon. 6 March 2018. Penguin Books. Google Books.
  3. Web site: WoRMS - World Register of Marine Species - Salvelinus obtusus Regan, 1908. www.marinespecies.org.
  4. Web site: eDIL - Irish Language Dictionary. edil.qub.ac.uk.
  5. Book: Skeat, Walter W.. An Etymological Dictionary of the English Language. 15 February 2013. Courier Corporation. 9780486317656. Google Books.
  6. Book: Various. Chambers's Twentieth Century Dictionary (part 1 of 4: A-D). Library of Alexandria. 9781465562883. Google Books.
  7. Book: Weekley, Ernest. An Etymological Dictionary of Modern English. 5 March 2013. Courier Corporation. 9780486122878. Google Books.
  8. Web site: Figure 11: Salvelinus obtusus, Blunt-snouted charr (Regan 1908, 1911).. ResearchGate.
  9. Web site: Salvelinus obtusus summary page. FishBase.
  10. Web site: The Annals and Magazine of Natural History: Zoology, Botany, and Geology. 6 March 2018. Taylor & Francis, Limited. Google Books.
  11. Book: Fletcher, George. Leinster. 21 May 2015. Cambridge University Press. 9781107511392. Google Books.
  12. Web site: European freshwater fishes: an heuristic checklist of the frshwater fishes of Europe (exclusive of former USSR), with an introduction for non-systematists and comments on nomenclature and conservation. Maurice. Kottelat. 6 March 1997. Slovak Academy of Sciences. Google Books.
  13. Web site: Irish Fisheries Investigations: Freshwater. 6 March 1966. Stationery Office; To be purchased from Government Publications Sale Office. Google Books.
  14. Web site: The Aquarist and Pondkeeper. 6 March 1971. Google Books.

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