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Conservation of the Irish Populations of the Pollan Coregonus autumnalis

Conservation of the Irish Populations of the Pollan Coregonus autumnalis The Irish lake populations of pollan Coregonus autumnalis Pallas are detached from other Arctic populations and exist at the southern extreme of the range of the species. They are landlocked relics of postglacial colonisation by anadromous forms. In Ireland, pollan exist in atypical habitats and temperature ranges for the species as a whole and are threatened with extinction by a range of potentially detrimental factors, including eutrophication and competition with introduced nonindigenous species. All but one of the four populations is critically endangered. This paper summarises current knowledge of pollan, the status of the four populations and actions proposed to protect and enhance the remaining stocks. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Biology and Environment: Proceedings of the Royal Irish Academy Royal Irish Academy

Conservation of the Irish Populations of the Pollan Coregonus autumnalis

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Publisher
Royal Irish Academy
Copyright
Copyright © 2004 RIA
ISSN
0791-7945
eISSN
2009-003X
DOI
10.3318/BIOE.2004.104.3.67
Publisher site
See Article on Publisher Site

Abstract

The Irish lake populations of pollan Coregonus autumnalis Pallas are detached from other Arctic populations and exist at the southern extreme of the range of the species. They are landlocked relics of postglacial colonisation by anadromous forms. In Ireland, pollan exist in atypical habitats and temperature ranges for the species as a whole and are threatened with extinction by a range of potentially detrimental factors, including eutrophication and competition with introduced nonindigenous species. All but one of the four populations is critically endangered. This paper summarises current knowledge of pollan, the status of the four populations and actions proposed to protect and enhance the remaining stocks.

Journal

Biology and Environment: Proceedings of the Royal Irish AcademyRoyal Irish Academy

Published: Sep 1, 2004

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