Trends in breeding duck populations at Loch Leven, Perth & Kinross

Lauder, A.

Scottish Birds e; 27: 55-63


Accession: 024009389

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Results of annual breeding duck surveys from 1985 to 2004 are presented. Comparisons with earlier studies show that some significant population changes have occurred. Notable increases occurred with Gadwall, Eurasian Teal and Common Pochard while decreases have occurred with Common Shelduck, Eurasian Wigeon, Northern Shoveler and Tufted Duck. Possible reasons for these changes are discussed including the role of submerged macrophytes, water quality and increases in predator populations.