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Documents disponibles écrits par cet auteur (17)
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Article
Svein Dale, Auteur ; Øyvind Meland Edvardsen, AuteurBird species depending on seeds from masting trees face large temporal and spatial variation in food availability and perform nomadic or irruptive movements to locate food. In northern Europe, the Common Crossbill (Loxia curvirostra) is speciali[...]
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Ida M.M. Sakseide, Auteur ; Svein Dale, AuteurThe Northern Lapwing Vanellus vanellus is classified as critically endangered on the Norwegian Red List, and threats include agricultural practices and predation. Habitat use and hatching success were monitored during the 2019 breeding season in[...]
Article
Svein Dale, AuteurSeveral species of owls and seed-eating birds breeding in boreal forests may occur irruptively in areas south of their regular wintering range. One common explanation is that they may be forced to move south if food supplies have crashed (push h[...]
Article
Svein Dale, AuteurIn boreal forests, food supplies typically have cyclic variations, and many species here fluctuate in numbers from year to year. One group of species showing large variations in population size is birds specialized on seeds from masting trees. H[...]
Article
Frédéric Jiguct, Auteur ; Raphaël Arlettaz, Auteur ; Hans-Günther Bauer, Auteur ; Viktor Belik, Auteur ; José Luis Copete, Auteur ; Laurent Couzi, Auteur ; Michel Alexandre Czajkowski, Auteur ; Svein Dale, Auteur ; Valery Dombrovski, Auteur ; Jaanus Elts, Auteur ; others, Auteur
Article
Frédéric Jiguet, Auteur ; Raphaël Arlettaz, Auteur ; Hans-Guenther Bauer, Auteur ; Viktor Belik, Auteur ; José Luis Copete, Auteur ; Laurent Couzi, Auteur ; Michel Alexandre Czajkowski, Auteur ; Svein Dale, Auteur ; Valery Dombrovski, Auteur ; Jaanus Elts, Auteur ; Yves Ferrand, Auteur ; Regis Hargues, Auteur ; Guy M. Kirwan, Auteur ; Simonas Minkevicius, Auteur ; Markus Piha, Auteur ; Gunnar Selstam, Auteur ; Michal Skierczynski, Auteur ; Jean-Philippe Siblet, Auteur ; Aleksandr Sokolov, AuteurFollowing recent updates proposed by BirdLife International and further updates across Europe gathered in the context of a continent-wide study of the migration strategy of the species, we propose here an update of national population sizes and [...]
Article
Linn M. Bjørvik, Auteur ; Svein Dale, Auteur ; Gudmund H. Hermansen, Auteur ; Pantaleo K. T. Munishi, Auteur ; Stein R. Moe, AuteurHuman activity affects wildlife in many ways, but there have been few studies of how wildlife behavioural responses to human disturbance vary with distance from centres of human activity. Theory suggests that fear responses may be either higher [...]
Article
Gunvar Mikkelsen, Auteur ; Svein Dale, Auteur ; Thorstein Holtskog, Auteur ; Michal Budka, Auteur ; Tomasz S. Osiejuk, AuteurMovements of animals at large spatial scales are important in ecology and conservation biology, but current methods for monitoring long-distance movements (e.g. ringing or telemetry) are resource demanding and limit sample sizes. Many birds have[...]
Article
Tomasz S. Osiejuk, Auteur ; Katarzyna Losak, Auteur ; Svein Dale, AuteurSeveral studies demonstrated that bird song functions as a first line of territorial defence. The efficiency of deterring rivals depends strongly on the strategy of singing used (e.g. alternating/overlapping singing, singing with low/high rate, [...]
Article
Svein Dale, AuteurThe cost of reproduction is expected to influence survival or future reproduction. Most previous studies have assessed cost of reproduction in relation to natural and experimental variation in number of offspring produced. The ortolan bunting Em[...]
Article
Svein Dale, Auteur ; Peder Christiansen, AuteurIn order to understand habitat selection in birds, it is important to know how individuals respond when encountering a variety of habitats during dispersal and must choose between them. However, very few field studies have addressed this questio[...]
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Svein Dale, AuteurAnalyses of lifetime fitness in birds are typically based on estimates of breeding success, in particular the number of offspring fledged. Small and isolated bird populations often have a male-skewed adult sex ratio, so that male lifetime produc[...]
Article
Michal Budka, Auteur ; Gunvar Mikkelsen, Auteur ; Lucia Turčoková, Auteur ; Yoan Fourcade, Auteur ; Svein Dale, Auteur ; Tomasz S. Osiejuk, AuteurThis study was conducted to characterise macrogeographic variation in the vocalisation of the corncrake Crex crex, a bird species with a non-learned and highly stereotyped call. We also examined: 1) whether call characteristics remained stable a[...]
Article
Svein Dale, Auteur ; Kjetil Hansen, AuteurSince the expansion of the Rustic Bunting (Emberiza rustica) westwards in northern Europe during the 19th and 20th centuries, declines have been reported in Fennoscandia. The Norwegian population was 100-500 breeding pairs in 1994. We carried ou[...]
Article
Svein Dale, Auteur ; Ellen T. Andreassen, AuteurThe Siberian Tit (Poecile cinctus) is an old-growth forest specialist in the northern taiga. The Finnish population has declined dramatically due to logging. An isolated population occurs in southern Norway. This population was estimated at 1,00[...]
Article
Svein Dale, Auteur ; Oyvind Steifetten, AuteurChanges in population size of local populations of birds have usually been interpreted in relation to adult return rate and recruitment of young individuals after natal dispersal. Little is known about the importance of redistribution of adult i[...]
Article
Svein Dale, AuteurNatal dispersal distance and direction determine the likelihood that siblings will settle close together and hence the risk of inbreeding. Several studies have shown a sibling resemblance in dispersal distance, but few studies have analysed sibl[...]
