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Pollan (fish)
The pollan〔 or Irish pollan〔 (''Coregonus pollan''〔 or ''Coregonus autumnalis''〔() IFI Inland Fisheries Ireland (accessed 1 June 2015)〕) is a freshwater whitefish known only from five Irish lakes, Lough Neagh, Lower Lough Erne, Lough Ree, Lough Derg, and Lough Allen.
==Conservation status==
The pollan populations are threatened by ecosystem changes such as eutrophication and increases in introduced species, including pike, roach, and zebra mussel.〔 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.〔 The Lough Allen population was only confirmed for the first time in 2006.〔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.〕 Other populations rely on stocking for their survival.〔Freyhof, J. & Kottelat, M. (2008) (''Coregonus pollan'' ) IUCN Red List of Threatened Species. Version 2010.1. Downloaded 25 April 2010.〕
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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