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Article
Hui Yui, Auteur ; Marcel Klaassen, AuteurMany waterfowl species go through a wing moult where all flight feathers are lost simultaneously, rendering the birds flightless while their feathers are regrowing. This puts constraints on the birds during this energetically and nutritiously de[...]
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Amélie Corriveau, Auteur ; Marcel Klaassen, Auteur ; Tara L. Crewe, Auteur ; Mirjam Kaestli, Auteur ; Stephen T. Garnett, Auteur ; David A. Loewensteiner, Auteur ; Rebecca M. Rogers, Auteur ; Hamish A. Campbell, AuteurWaterbirds commonly undertake extensive movements in search of resources. While much is known about waterbird movements within temperate regions where resource distribution is seasonally predictable, less is understood about waterbird movements [...]
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Włodzimierz Meissner, Auteur ; Grzegorz Zaniewicz, Auteur ; Patrycja Gogg, Auteur ; Lucyna Pilacka, Auteur ; Marcel Klaassen, Auteur ; Clive Minton, AuteurStudies of moult of flight feathers have traditionally used the moult score, in which primaries were scored between 0 (old) and 5 (fully grown new primary) and added up. The moult score eventually became increasingly replaced by the percentage o[...]
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Wlodzimierz Meissner, Auteur ; Grzegorz Zaniewicz, Auteur ; Patrycja Gogga, Auteur ; Lucyna Pilack, Auteur ; Marcel Klaassen, Auteur ; Clive Minton, AuteurStudies of moult of flight feathers have traditionally used the moult score, in which primaries were scored between 0 (old) and 5 (fully grown new primary) and added up. The moult score eventually became increasingly replaced by the percentage o[...]
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Beata Ujvari, Auteur ; Marcel Klaassen, Auteur ; Nynke Raven, Auteur ; Tracey Russell, Auteur ; Marion Vittecoq, Auteur ; Rodrigo Hamede, Auteur ; Frederic Thomas, Auteur ; Thomas Madsen, AuteurGenetic diversity is essential for adaptive capacities, providing organisms with the potential of successfully responding to intrinsic and extrinsic challenges. Although a clear reciprocal link between genetic diversity and resistance to parasit[...]
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Marion Vittecoq, Auteur ; Mathieu Giraudeau, Auteur ; Tuul Sepp, Auteur ; David J. Marcogliese, Auteur ; Marcel Klaassen, Auteur ; François Renaud, Auteur ; Beata Ujvari, Auteur ; Frederic Thomas, AuteurBoth field and experimental evolution studies have demonstrated that organisms naturally or artificially exposed to environmental oncogenic factors can, sometimes rapidly, evolve specific adaptations to cope with pollutants and their adverse eff[...]
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Jan A. van Gils, Auteur ; Simeon Lisovski, Auteur ; Tamar Lok, Auteur ; Włodzimierz Meissner, Auteur ; Agnieszka Ożarowska, Auteur ; Jimmy de Fouw, Auteur ; Eldar Rakhimberdiev, Auteur ; Mikhail Y. Soloviev, Auteur ; Theunis Piersma, Auteur ; Marcel Klaassen, AuteurReductions in body size are increasingly being identified as a response to climate warming. Here we present evidence for a case of such body shrinkage, potentially due to malnutrition in early life. We show that an avian long-distance migrant (r[...]
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Yaara Aharon-Rotman, Auteur ; Silke Bauer, Auteur ; Marcel Klaassen, AuteurThe conservation of migratory species represents a major challenge, as they use multiple sites, all contributing in varying degrees in sustaining high survival and reproductive success. There is particular concern for shorebirds of the East Asia[...]
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Simeon Lisovski, Auteur ; Ken Gosbell, Auteur ; Maureen Christie, Auteur ; Bethany J. Hoye, Auteur ; Marcel Klaassen, Auteur ; Iain D. Stewart, Auteur ; Alice J. Taysom, Auteur ; Clive Minton, AuteurWorldwide, most populations of migratory shorebirds are in jeopardy, none more so than those of the East Asian–Australasian Flyway (EAAF). In order to preserve these highly mobile species a detailed understanding of their use of feeding and rest[...]
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Meijuan Zhao, Auteur ; Lei Cao, Auteur ; Marcel Klaassen, Auteur ; Yong Zhang, Auteur ; Anthony D. Fox, AuteurCompetition may occur when two species with similar feeding ecologies exploit the same limited resources in time and space. In recent years, the Eastern Tundra Bean Goose Anser fabalis serrirostris and Greater White-fronted Goose Anser albifrons[...]
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Stuart Bearhop, Auteur ; Marcel Klaassen, Auteur
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Marcel Klaassen, Auteur
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Marcel Klaassen, AuteurBirds produce their eggs from recently ingested nutrients ('income breeders') or from body stores ('capital breeders'). Since arctic summers are short, ecologists have long thought that arctic migrants need to bring the nutrients for egg product[...]
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Silke Bauer, Auteur ; Martijn Van Dinther, Auteur ; Kjell-Arild Hogda, Auteur ; Marcel Klaassen, Auteur ; Jesper Madsen, Auteur1. How climatic changes affect migratory birds remains difficult to predict because birds use multiple sites in a highly interdependent manner. A better understanding of how conditions along the flyway affect migration and ultimately fitness is [...]
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Marcel Klaassen, Auteur ; Steffen Hahn, Auteur ; Harry Korthals, Auteur ; Jesper Madsen, AuteurMany Arctic-breeding waterbirds are thought to bring nutrients for egg production from southern latitudes to allow early breeding. It has proved problematic to quantify the extent of such capital breeding and identify whether nutrients for egg p[...]
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Rascha J. M. Nuijten, Auteur ; Andrea Kolzsch, Auteur ; Jan A. van Gils, Auteur ; Bethany J. Hoye, Auteur ; Kees Oosterbeek, Auteur ; Peter P. de Vries, Auteur ; Marcel Klaassen, Auteur ; Bart A. Nolet, AuteurIn the vast majority of migratory bird species studied so far, spring migration has been found to proceed faster than autumn migration. In spring, selection pressures for rapid migration are purportedly higher, and migratory conditions such as f[...]
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Marcel Klaassen, Auteur ; Kenneth F. Abraham, Auteur ; Robert L. Jefferies, Auteur ; Mark Vrtiska, AuteurDans Ardea (94(3) 2006)The extent to which migratory birds that breed in the Arctic and winter in southern biomes rely on residual body stores for reproduction is unresolved. The short arctic summer and the limited availability of food early in the season constrain th[...]
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\AAke Lindström, Auteur ; Marcel Klaassen, Auteur ; Richard Lanctot, Auteur
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Clive Minton, Auteur ; Ken Gosbell, Auteur ; Penny Johns, Auteur ; Maureen Christie, Auteur ; Marcel Klaassen, Auteur ; Chris Hassell, Auteur ; Adrian Boyle, Auteur ; Rosalind Jessop, Auteur ; James Fox, Auteur
Article
Marten B. Hjernquist, Auteur ; Thor Veen, Auteur ; Laura Font, Auteur ; Marcel Klaassen, AuteurFor migrants, we often lack complete information of their spatial distribution year round. Here, we used stable carbon, nitrogen and hydrogen isotope ratios extracted from feathers grown at the wintering sites of the long-distance migratory coll[...]
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Jacintha G. B. van Dijk, Auteur ; Wlodzimierz Meissner, Auteur ; Marcel Klaassen, AuteurHydrogen stable isotopes (H-2) in feathers are used to determine the origin and migration strategy of birds. To identify the geographic location of the site of feather synthesis, calibration curves for the relation between feather H-2 and amount[...]
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Silke Bauer, Auteur ; Jesper Madsen, Auteur ; Marcel Klaassen, AuteurDans Ardea (94(3) 2006)Long-distance bird migration consists of several flight episodes interrupted by a series of resting and refuelling periods on stopover sites. We assessed the role of food availability as the determinant of staging decisions focusing on the follo[...]
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Jan A. van Gils, Auteur ; Jan H. Beekman, Auteur ; Pieter Coehoorn, Auteur ; Els Corporaal, Auteur ; Ten Dekkers, Auteur ; Marcel Klaassen, Auteur ; Rik van Kraaij, Auteur ; Rinze de Leeuw, Auteur ; Peter P. de Vries, Auteur1. Within the broad field of optimal foraging, it is increasingly acknowledged that animals often face digestive constraints rather than constraints on rates of food collection. This therefore calls for a formalization of how animals could optim[...]
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Silke Bauer, Auteur ; Marcel Klaassen, AuteurMigration is a widespread phenomenon in the animal kingdom, including many taxonomic groups and modes of locomotion. Developing an understanding of the proximate and ultimate causes for this behaviour not only addresses fundamental ecological qu[...]
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Silke Bauer, Auteur ; Marcel Klaassen, Auteur
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Clive Minton, Auteur ; Ken Gosbell, Auteur ; Penny Johns, Auteur ; Maureen Christie, Auteur ; Marcel Klaassen, Auteur ; Chris Hassell, Auteur ; Adrian Boyle, Auteur ; Rosalind Jessop, Auteur ; James Fox, Auteur
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Steffen Hahn, Auteur ; Maarten J. J. E. Loonen, Auteur ; Marcel Klaassen, AuteurBreeding in the high Arctic is time constrained and animals should therefore start with their annual reproduction as early as possible. To allow for such early reproduction in migratory birds, females arrive at the breeding grounds either with b[...]
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David Roshier, Auteur ; Martin Asmus, Auteur ; Marcel Klaassen, AuteurIn contrast to northern temperate environments, where day length and temperature changes are obvious proximate cues for movement to resource-rich breeding habitats, the cues for movement used by birds in an often resource-poor, stochastic enviro[...]
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Eric W. M. Stienen, Auteur ; Allix Brenninkmeijer, Auteur ; Marcel Klaassen, AuteurGull-billed Terns Gelochelidon nilotica wintering in Guinea Bissau mainly fed on fiddler crabs Uca tangeri and were occasionally seen feeding on fish and locusts. As fiddler crabs have a low energy content, terns need a large gross intake to mee[...]
