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Documents disponibles écrits par cet auteur (6)
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Article
Maja Derlink, Auteur ; Chris Wernham, Auteur ; Irena Bertoncelj, Auteur ; Andras Kovacs, Auteur ; Pertti Saurola, Auteur ; Guy Duke, Auteur ; Paola Movalli, Auteur ; Al Vrezec, AuteurCapsule: A questionnaire identified 1196 raptor monitoring species schemes within 236 monitoring programmes across 37 countries.Aims: To assess the level of monitoring of status/trends of raptors across Europe, to produce a web-based inventory o[...]
Article
John Calladine, Auteur ; Graeme Garner, Auteur ; Chris Wernham, Auteur ; Nigel Buxton, AuteurCapsule The proportion of time during which breeding Short-eared Owls could be seen during daylight hours was low and assessment of seasonal variation in their detection likelihoods suggests that surveys may only be able reliably to identify pai[...]
Article
John Calladine, Auteur ; Graeme Garner, Auteur ; Chris Wernham, Auteur ; Nigel Buxton, AuteurCapsule The proportion of time during which breeding Short-eared Owls could be seen during daylight hours was low and assessment of seasonal variation in their detection likelihoods suggests that surveys may only be able reliably to identify pai[...]
Article
John Calladine, Auteur ; Graeme Garner, Auteur ; Chris Wernham, Auteur ; Andre Thiel, AuteurDans Bird Study (56 2009)Capsule A minimum of four constant-effort-search survey visits are required to generate reliable population estimates of breeding birds on moorland that are not subject to biases associated with varying levels of detectability through the season[...]
Article
Al Vrezec, Auteur ; Guy Duke, Auteur ; Andras Kovacs, Auteur ; Pertti Saurola, Auteur ; Chris Wernham, Auteur ; Ian Burfield, Auteur ; Paola Movalli, Auteur ; Irena Bertoncelj, AuteurDespite the key role of raptors (including birds of prey Falconiformes and owls Strigiformes) in ecosystems and their sensitivity to environmental change, a well coordinated, Europe-wide monitoring of raptors is lacking. EURAPMON, a Research Net[...]
Article
Andy Dobson, Auteur ; Mark Holling, Auteur ; Kelvin Jones, Auteur ; Chris Wernham, AuteurThis paper summarises monitoring of raptors (diurnal birds of prey and owls) in Great Britain. There is a long tradition of raptor monitoring in Great Britain, and all regularly breeding species receive at least a degree of survey coverage. Comm[...]
