Pollan (fish)

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Pollan
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Actinopterygii
Order: Salmoniformes
Family: Salmonidae
Subfamily: Coregoninae
Species: C. pollan
Binomial name
Coregonus pollan
W. Thompson, 1835
Synonyms
  • Coregonus autumnalis pollan Thompson, 1835
  • Coregonus elegans Thompson, 1839
  • Coregonus altior Regan, 1908 [1]

The pollan[2] or Irish pollan[1] (Coregonus pollan[1] or Coregonus autumnalis[2]) is a freshwater whitefish known only from five Irish lakes, Lough Neagh, Lower Lough Erne, Lough Ree, Lough Derg, and Lough Allen.

Conservation status[edit]

The pollan populations are threatened by ecosystem changes such as eutrophication and increases in introduced species, including pike, roach, and zebra mussel.[3] Only the population of Lough Neagh in Northern Ireland remains abundant and supports a small fish commercial fishery. The other UK population in Lough Erne has severely declined.[3] The Lough Allen population was only confirmed for the first time in 2006.[4] Other populations rely on stocking for their survival.[5]

Classification[edit]

In scientific literature and national biodiversity and conservation assessments, the Irish pollan are usually classified within the species Coregonus autumnalis. That is a widespread anadromous whitefish which inhabits coastal waters and rivers of Arctic Siberia, Alaska, and Canada and is there known as the Arctic cisco or Siberian omul.[2][4][6][7] C. autumnalis is not distributed elsewhere in northwestern Europe, and the pollan are often given a status of subspecies as Coregonus autumnalis pollan.[3][8] These classifications are based on the close genetic similarity of the Arctic and Irish whitefish populations.[9][10][11] By IUCN and in the FishBase, the Irish pollan is, however, listed as a distinct fish species Coregonus pollan.[5][1]

Unlike its Arctic relatives, the Irish pollan does not migrate to the sea.

References[edit]

  1. ^ a b c d Froese, Rainer and Pauly, Daniel, eds. (2016). "Coregonus pollan" in FishBase. April 2016 version.
  2. ^ a b c Pollan IFI Inland Fisheries Ireland (accessed 1 June 2015)
  3. ^ a b c Ferguson, A: Northern Ireland Priority Species: Coregonus autumnalis pollan – Pollan habitats.org.uk (read April 2010)
  4. ^ a b Harrison, A.J., Kelly, F.L., Rosell, R.S., Champ, T.W.S., Connor, L. and Girvan, J.R. (2010) First record and initial hydroacoustic stock assessment of pollan Coregonus autumnalis Pallas in Lough Allen, Ireland. Biology and Environment: Proceedings of the Royal Irish Academy 110B, 69-74.
  5. ^ a b Freyhof, J. & Kottelat, M. (2008) Coregonus pollan IUCN Red List of Threatened Species. Version 2010.1. Downloaded 25 April 2010.
  6. ^ All-Ireland Species Action Plan: Pollan (Coregonus autumnalis) Northern Ireland Environmental Agency 2006
  7. ^ National action plan - Coregonus autumnalis (Pollan) UK Biodiversity Action Reporting System. (read April 2010)
  8. ^ Andrew J. Harrison, Lynda Connor, Emma Morrissey and Fiona Kelly (2012) Current status of pollan Coregonus autumnalis pollan in Lough Ree, Ireland. Biology and Environment: Proc. Royal Irish Academy 112B, 1-9 DOI: 10.3318/BIOE.2012.09
  9. ^ Ferguson, A., Himberg, K.-J.M., & Svärdson, G. (1978). Systematics of the Irish pollan (Coregonus pollan Thompson): an electrophoretic comparison with other Holarctic Coregoninae. Journal of Fish Biology 12, 221-233.
  10. ^ Bodaly, R.A., Vuorinen, D.A., Ward, R.D., Luczynski, M., & Reist, J.D. (1991). Genetic comparisons of the New and Old World coregonid fishes. Journal of Fish Biology 38, 37-51.
  11. ^ Politov, D.V., Gordon, N.Y., & Makhrov, A.A. (2002). Genetic identification and taxonomic relationships of six Siberian species of Coregonus. Archiv für Hydrobiologie: Special Issues Advances in Limnology 57, 21-34.

External links[edit]