Population dynamics and whereabouts of ducks ringed in the Netherlands : an analysis of 70 years of ring data

Between 1936 and 2006 over 140,000 ducks were ringed in the Netherlands, many of them in duck decoys. Around 41,000 ducks were reported back. The majority of those were recovered dead, but 1,400 were recaptured alive. The results were stored in a database. In this study, the database was redesigned and a demonstration website was built. The data were analyzed focussing on three species that form the majority of the duck species caught in decoys: teal (86%), wigeon (98%) and mallard (74%). The most active decoys are located along the three major Dutch rivers, east of Lake IJssel and on Texel. I... Mehr ...