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Carss, D.; Spears, B.M. ORCID: https://orcid.org/0000-0002-0876-0405; Quinn, L.; Cooper, R.. 2012 Long-term variations in waterfowl populations in Loch Leven: identifying discontinuities between local and national trends. Hydrobiologia, 681 (1). 85-104. https://doi.org/10.1007/s10750-011-0927-6