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Article
Nicholas P. Huffeldt, Auteur ; Manuel Ballesteros, Auteur ; Barbara Helm, Auteur ; Jannie F. Linnebjerg, Auteur ; Flemming R. Merkel, Auteur ; Anders Mosbech, Auteur ; Morten Frederiksen, AuteurScheduling between mates in species with long-term pair bonds can be essential for positive fitness. The annual cycle in photoperiod is the primary environmental cue used by many animals to synchronize behavior and physiology among members of a [...]
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Thomas Bregnballe, Auteur ; Morten Frederiksen, Auteur
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Thomas Bregnballe, Auteur ; Christof Herrmann, Auteur ; Kjeld Tommy Pedersen, Auteur ; Juliane Wendt, Auteur ; Jelena Kralj, Auteur ; Morten Frederiksen, Auteur
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Katherine R. S. Snell, Auteur ; Morten Frederiksen, Auteur ; Thomas Bregnballe, AuteurDifferential migration strategies in the same population provide an opportunity to investigate the development and constraints of the migratory programme. We used data from birds ringed from the large Danish breeding population of Great Cormoran[...]
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Anthony D. Fox, Auteur ; Morten Frederiksen, Auteur ; Thomas Heinicke, Auteur ; Kevin K. Clausen, Auteur ; Henk P. van der Jeugd, AuteurAn estimated 50% decline in Taiga Bean Geese A. fabalis between the mid-1990s and 2015 contrasted increasing numbers of Tundra Bean Goose A. serrirostris wintering in Western Europe at the same time. Seber dead-recovery analysis of metal-ringed [...]
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Morten Frederiksen, Auteur ; Olivier Gilg, Auteur ; Glenn Yannic, AuteurDans Ibis (163(2) 2021)Seabirds rarely cross major terrestrial barriers during seasonal migration, possibly because they have a limited ability to build up fat stores. For the first time, we tracked two Ivory Gulls with GPS loggers during spring migration from the win[...]
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Flemming Merkel, Auteur ; David Boertmann, Auteur ; Knud Falk, Auteur ; Morten Frederiksen, Auteur ; Kasper Johansen, Auteur ; Aili Lage Labansen, Auteur ; Jannie Fries Linnebjerg, Auteur ; Anders Mosbech, Auteur ; Christian Sonne, AuteurRitenbenk/Innaq in Disko Bay is the only remaining Thick-billed Murre colony in central West Greenland. It has declined by 72% since 1980 and now (2012) holds c.1,100 breeding pairs. In 2005-2006 and 2011-2012, a number of studies were carried o[...]
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David Boertmann, Auteur ; Morten Frederiksen, AuteurGreat Black-backed (Larus marinus), Lesser Black-backed (L. fuscus) and Herring (L. argentatus) gulls have all shown population increases and range expansion in Greenland in recent decades, but in very different ways. Great Black-backed Gulls in[...]
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Jannie F. Linnebjerg, Auteur ; Anna Reuleaux, Auteur ; Kim N. Mouritsen, Auteur ; Morten Frederiksen, AuteurSympatric nesting seabird species are often found to differ in one or more aspects of their foraging ecology. This is usually interpreted as resource partitioning, potentially due to current or past competition, but other explanations have been [...]
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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 [...]
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Rune Skjold Tjornlov, Auteur ; Jakob Humaidan, Auteur ; Morten Frederiksen, AuteurCapsuleThe presence of avian cholera depressed annual survival of female Common Eiders in a Danish colony. AimsTo estimate the annual survival of adult female Common Eiders in the colony of Helleholm, Denmark, and evaluate the effect of winter t[...]
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Toby J. Reynolds, Auteur ; Michael P. Harris, Auteur ; Ruth King, Auteur ; Robert L. Swann, Auteur ; David C. Jardine, Auteur ; Morten Frederiksen, Auteur ; Sarah Wanless, AuteurSpatiotemporal variation in survival may be an important driver of multi-population dynamics in many wild animal species, yet few scientific studies have addressed this issue, primarily due to a lack of sufficiently comprehensive and detailed da[...]
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Chiara Marchi, Auteur ; Irene F. Sanz, Auteur ; Eleonore Blot, Auteur ; Jannick Hansen, Auteur ; Alyn J. Walsh, Auteur ; Morten Frederiksen, Auteur ; Anthony D. Fox, Auteur
Article
Thomas Bregnballe, Auteur ; Morten Frederiksen, Auteur ; Jens Gregersen, AuteurDans Ardea (94(3) 2006)Great Cormorants Phalacrocorax carbo sinensis breeding in the same colony often vary markedly in where they winter and in their date of arrival. The main aim of this study was to explore whether date of arrival, fledgling production and lifetime[...]
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Morten Frederiksen, Auteur ; Jean-Dominique Lebreton, Auteur ; Roger Pradel, Auteur ; Remi Choquet, Auteur ; Olivier Gimenez, AuteurIn a rapidly changing world, understanding and predicting population change is a central aim of applied ecologists, and this involves studying the links between environmental variation and vital rates (survival, fecundity, etc.). Demographic ana[...]
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Jannie Fries Linnebjerg, Auteur ; Nicholas Per Huffeldt, Auteur ; Knud Falk, Auteur ; Flemming R. Merkel, Auteur ; Anders Mosbech, Auteur ; Morten Frederiksen, AuteurLeg-mounted loggers are increasingly used in seabird activity studies, but few studies have validated the information obtained about bird behaviour with independent data. Using Brunnich's Guillemot Uria lomvia as a study species, we show by comp[...]
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Morten Frederiksen, Auteur ; Sebastien Descamps, Auteur ; Kjell Einar Erikstad, Auteur ; Anthony J. Gaston, Auteur ; H. Grant Gilchrist, Auteur ; David Grémillet, Auteur ; Kasper L. Johansen, Auteur ; Yann Kolbeinsson, Auteur ; Jannie F. Linnebjerg, Auteur ; Mark L. Mallory, Auteur ; Laura A. McFarlane Tranquilla, Auteur ; Flemming R. Merkel, Auteur ; William A. Montevecchi, Auteur ; Anders Mosbech, Auteur ; Tone K. Reiertsen, Auteur ; Gregory J. Robertson, Auteur ; Harald Steen, Auteur ; Hallvard Strom, Auteur ; Thorkell L. Thorarinsson, AuteurPelagic seabirds are exposed to an array of potential threats during the non-breeding period, and effective management of these threats on a large scale requires knowledge of which populations winter where. Thick-billed murres (Uria lomvia) are [...]
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Jón Einar Jónsson, Auteur ; Morten Frederiksen, Auteur ; Alan D. Afton, AuteurDans Wildfowl (64 2014)Lesser Snow Geese Chen caerukscens caerulescens (hereafter Snow Geese) use two wintering habitats in southwest Louisiana. Snow Geese in coastal marshes generally have larger bodies and proportionally thicker bills, longer skulls and longer culme[...]
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Michael P. Harris, Auteur ; Morten Frederiksen, Auteur ; Sarah Wanless, AuteurWe studied juvenile survival of 20 cohorts of Common Guillemot Uria aalge chicks colour-ringed on the Isle of May, Scotland, using both live observations at the colony and dead recoveries, allowing estimation of fidelity to the colony as well as[...]
