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Documents disponibles écrits par cet auteur (17)
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Article
Lisa Vergin, Auteur ; Kevin Kuhlmann Clausen, Auteur ; Jesper Madsen, AuteurSuitable foraging habitats are essential for migratory birds during their wintering period, as well as alternative staging areas to which they can relocate, e.g. due to changes in weather conditions. This study focusses on the habitat use of Tai[...]
Article
Jesper Erenskjold Moeslund, Auteur ; Ane Kirstine Brunbjerg, Auteur ; Kevin Kuhlmann Clausen, Auteur ; Lars Dalby, Auteur ; Camilla Fløjgaard, Auteur ; Anders Juel, Auteur ; Jonathan Lenoir, Auteur ; Luke Flory, Auteur
Article
Kevin Kuhlmann Clausen, Auteur ; Thomas Kjaer Christensen, Auteur ; Ove Martin Gundersen, Auteur ; Jesper Madsen, Auteur ; Des Thompson, Auteur
Article
Anthony D. Fox, Auteur ; Kevin Kuhlmann Clausen, Auteur ; Lars Dalby, Auteur ; Thomas Kjaer Christensen, Auteur ; Peter Sunde, AuteurWe compared age and sex ratios amongst Eurasian Wigeon (Anas penelope) derived from Danish field observations and hunter-based shot samples throughout an entire winter in two consecutive years. In the middle period of both winters, sex ratios di[...]
Article
Kevin Kuhlmann Clausen, Auteur ; Jesper Madsen, AuteurSite fidelity is a strong and widespread feature of many waterfowl species, but little is known about the response of philopatric birds to changing environmental conditions at their preferred staging sites. In this study we analyse the response [...]
Article
Kevin Kuhlmann Clausen, Auteur ; Jesper Madsen, AuteurSite fidelity is a strong and widespread feature of many waterfowl species, but little is known about the response of philopatric birds to changing environmental conditions at their preferred staging sites. In this study we analyse the response [...]
Article
Anthony D. Fox, Auteur ; Jón Einar Jónsson, Auteur ; Tomas Aarvak, Auteur ; Thomas Bregnballe, Auteur ; Thomas Kjær Christensen, Auteur ; Kevin Kuhlmann Clausen, Auteur ; Preben Clausen, Auteur ; Lars Dalby, Auteur ; Thomas Eske Holm, Auteur ; Diego Pavon-Jordan, Auteur ; Karsten Laursen, Auteur ; Aleksi Lehikoinen, Auteur ; Svein-Hakon Lorentsen, Auteur ; Anders Pape Møller, Auteur ; Mikael Nordstrom, Auteur ; Markus Ost, Auteur ; Par Soderquist, Auteur ; Ole Roland Therkildsen, AuteurWe review the current and future threats to duck populations that breed, stage, moult and/or winter in the Nordic countries. Migratory duck species are sensitive indicators of their changing environment, and their societal value confirms the nee[...]
Article
Anthony D. Fox, Auteur ; Kevin Kuhlmann Clausen, Auteur ; Lars Dalby, Auteur ; Thomas Kjær Christensen, Auteur ; Peter Sunde, AuteurWe compared age and sex ratios among Eurasian Wigeon Anas penelope derived from Danish field observations and hunter-based shot samples throughout an entire winter. Sex ratios did not differ significantly between the two samples. Overall, first-[...]
Article
Anthony D. Fox, Auteur ; Kevin Kuhlmann Clausen, Auteur ; Lars Dalby, Auteur ; Thomas Kjaer Christensen, Auteur ; Peter Sunde, AuteurWe compared age and sex ratios among Eurasian Wigeon Anas penelope derived from Danish field observations and hunter-based shot samples throughout an entire winter. Sex ratios did not differ significantly between the two samples. Overall, first-[...]
Article
Kevin Kuhlmann Clausen, Auteur ; Morten Frederiksen, Auteur ; Jesper Madsen, AuteurCapsule The ability to estimate mark loss of ringed animals is important to assess demographic parameters from mark-recapture studies correctly. Based on 23 years of neck collar recovery data from the Svalbard breeding population of Pink-footed [...]
Article
Kevin Kuhlmann Clausen, Auteur ; Casper Caesar Faelled, Auteur ; Preben Clausen, AuteurCapsule The present study investigates the use of a mark-resight procedure to estimate total population size in a local goose population. Using colour-ring sightings of the increasingly scattered population of Light-bellied Brent Geese Branta be[...]
Article
Kevin Kuhlmann Clausen, Auteur ; Jesper Madsen, AuteurRinging and marking are widely used techniques in avian ecology to assist studies of migration, survival and behaviour, and often used to estimate population sizes. Only rarely, however, have the effects of these markings on bird viability been [...]
Article
Kevin Kuhlmann Clausen, Auteur ; Preben Clausen, Auteur ; Casper Caesar Faelled, Auteur ; Kim Norgaard Mouritsen, AuteurCoastal seagrasses are declining at increasing rates worldwide, forcing herbivores previously reliant on these habitats to abandon them in search of alternative ways to fulfil their daily energy budgets. After two decades of declining seagrass a[...]
Article
Kevin Kuhlmann Clausen, Auteur ; Preben Clausen, AuteurClimate change-induced rising sea levels are expected to affect coastal habitats worldwide, and the associated coastal squeeze in protected coastal areas might significantly alter availability of coastal habitats. This study combines coastal bat[...]
Article
Jesper Madsen, Auteur ; Kevin Kuhlmann Clausen, Auteur ; Thomas Kjær Christensen, Auteur ; Fred A. Johnson, AuteurAdjustment of hunting season length is often used to regulate harvest of waterbirds but the effects are disputed. We describe the first results of season length extension on the harvest of the pink-footed goose, which has been selected as the fi[...]
Article
Kevin Kuhlmann Clausen, Auteur ; Lars Dalby, Auteur ; Peter Sunde, Auteur ; Thomas Kjaer Christensen, Auteur ; Bjarke Egelund, Auteur ; Anthony David Fox, AuteurDemographic monitoring is vital for tracking and modelling the population dynamics of highly mobile bird populations. However, different types of monitoring can sometimes lead to different outcomes, and understanding the causes of equivocal resu[...]
Article
Kevin Kuhlmann Clausen, Auteur ; Preben Clausen, Auteur ; Anthony David Fox, Auteur ; Casper Caesar Faelled, Auteur ; Jesper Madsen, AuteurWe investigated how habitat-specific differences in behavioural patterns affected Brent Goose energetics along a feeding continuum from natural aquatic to inland agricultural habitats. Time-budgets showed that geese using salt-marshes and inland[...]
