The population is threatened by deteriorating water quality and by the ruffe, a fish introduced to the lake in the 1980s and now eating the eggs and fry of gwyniad. As a conservation measure, eggs of gwyniad have been transferred to Llyn Arenig Fawr, another nearby lake.
In Britain the gwyniad is usually considered a population belonging to the widespread Eurasian common whitefish (Coregonus lavaretus). By FishBase and by IUCN, it is listed as a distinct species of the Coregonus genus, C. pennantii.
- Freyhof, J. & Kottelat, M. 2008. Coregonus pennantii. In: IUCN Red List of Threatened Species. Version 2010.1. <www.iucnredlist.org>. Downloaded on 17 April 2010.
- Gwyniad BBC. Wales Nature & Outdoors (read April 2010)
- Gwyniad (Coregonus lavaretus) Snowdonian National Park
- Froese, Rainer and Pauly, Daniel, eds. (2009). "Coregonus pennantii" in FishBase. December 2009 version.
- Coregonus lavaretus -Gwyniad first.nature.com
- "Coregonus pennantii". Integrated Taxonomic Information System. Retrieved 12 December 2004.
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