Duehøge Accipitergentilis og fasanudsætning: et forsøg med fangst og flytning af Duehøge ved fasanudsætningspladser i Vendsyssel 1998-2009

摘要

The practice of releasing Pheasants for hunting purposes has often led to"regulation"of predators. When large-scale release of Pheasants started in Vendsyssel (northern Jutland in Denmark) in the 1990s, the population of Goshawks was very high. This quickly led to (illegal) trapping and shooting of the Goshawks, leading to a marked decrease of Goshawk numbers near release sites (Table 1). At the time, the local Goshawks had been under study by the author through many years, in a 2417 km2 study area in Vendsyssel. Beginning in 1998, a parallel study was initiated, aiming at reducing the conflicts between Pheasant releasing and Goshawks. In cooperation with Pheasant re-leasers, Goshawks were trapped and later released several kilometers away from the site where trapped, in order to find out if they returned to the site of capture (and so continued to pose a threat to the Pheasants).During 1998-2009, 165 Goshawks were captured at Pheasant release sites. All but 11 of the birds were subsequently released away from the site after being ringed (if necessary - many were ringed already).