Redistribution of the Cormorant population in the IJsselmeer area

Great Cormorant (Phalacrocorax carbo) Science Article 4


After a period of strong increase and establishment of new colonies in the Cormorant population of the IJsselmeer area, growth levelled off. This occurred after a lake-wide crash in breeding numbers in 1994, following a year with an extremely poor breeding success. In recent years, the Cormorants shift their breeding site more and more towards the central and northern parts of the nearby lake IJsselmeer. Here we analyse whether the redistribution of the birds in the different colonies resulted in stabilizing numbers and a maximised output of young per couple.

Mennobart van Eerden & Stef van Rijn (2002), Rapport RIZA

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