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Documents disponibles écrits par cet auteur (12)
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Article
Heidi Krüger, Auteur ; Kim Jaatinen, Auteur ; Sari Holopainen, Auteur ; Milla Niemi, Auteur ; Mia Vehkaoja, Auteur ; Juha Virtanen, Auteur ; Veli-Matti Vaananen, Auteur ; Petri Nummi, AuteurAgricultural intensification has significantly impacted habitat structures in agricultural landscapes and is one of the main drivers of biodiversity decline, especially in farmland birds. Birds are considered to reflect well the trends in other [...]
Article
Petri Nummi, Auteur ; Eeva-Maria Suontakanen, Auteur ; Sari Holopainen, Auteur ; Veli-Matti Vaananen, AuteurAvian species respond to ecological variability at a range of spatial scales and according to life history stage. Beaver dams create wetland systems for waterbirds that are utilized throughout different stages of the breeding season. We studied [...]
Article
Sari Holopainen, Auteur ; Céline Arzel, Auteur ; Johan Elmberg, Auteur ; Anthony D. Fox, Auteur ; Matthieu Guillemain, Auteur ; Gunnar Gunnarsson, Auteur ; Petri Nummi, Auteur ; Kjell Sjoberg, Auteur ; Veli-Matti Vaananen, Auteur ; Mikko Alhainen, Auteur ; Hannu Poysa, AuteurEurasian migratory duck species represent a natural resource shared between European countries. As is evident throughout human harvest history, lack of coordinated management and monitoring at appropriate levels often leads to ‘the tragedy of th[...]
Article
Rauno A. Yrjölä, Auteur ; Sari Holopainen, Auteur ; Raimo Pakarinen, Auteur ; Sini Tuoriniemi, Auteur ; Matti Luostarinen, Auteur ; Markku Mikkola-Roos, Auteur ; Petri Nummi, Auteur ; Veli-Matti Vaananen, Auteur
Article
Petri Nummi, Auteur ; Veli-Matti Vaananen, Auteur ; Sari Holopainen, Auteur ; Hannu Poysa, AuteurDucks share the aquatic environment with invertebrate-eating fish. Thus, competitive interactions may take place. Fish have been introduced to many formerly fishless lakes, which has profoundly affected the competitive and predatory relations in[...]
Article
Veli-Matti Vaananen, Auteur ; Hannu Poysa, Auteur ; Pentti Runko, AuteurHeterospecific grouping is often associated with reduced predation. One example of this phenomenon is birds breeding in association with more aggressive species. Here we report a study of the association between breeding ducks and small colonial[...]
Article
Johan Elmberg, Auteur ; Petri Nummi, Auteur ; Hannu Poysa, Auteur ; Kjell Sjoberg, Auteur ; Gunnar Gunnarsson, Auteur ; Preben Clausen, Auteur ; Matthieu Guillemain, Auteur ; David Rodrigues, Auteur ; Veli-Matti Vaananen, AuteurIt is an axiom in ecology that knowing the sheer number of individuals in a population is of very little help if the objective is to understand future and past changes in population size. Yet, this is exactly how migratory European ducks are mon[...]
Article
Autumn survival inferred from wing age ratios: Wigeon juvenile survival half that of adults at best?
Matthieu Guillemain, Auteur ; Anthony D. Fox, Auteur ; Hannu Poysa, Auteur ; Veli-Matti Vaananen, Auteur ; Thomas Kjaer Christensen, Auteur ; Patrick Triplet, Auteur ; Vincent Schricke, Auteur ; Fränzi Korner-Nievergelt, AuteurMeasures of first-year autumn mortality rates are important parameters for understanding population dynamics, but have been hitherto unavailable for dabbling ducks in Europe, because most ducks are ringed in winter. We used the temporal change i[...]
Article
Heidi Kallioniemi, Auteur ; Veli-Matti Vaananen, Auteur ; Petri Nummi, Auteur ; Juha Virtanen, AuteurWe investigated the survival and breeding success of common pheasants Phasianus colchicus of two origins and in two predator densities. We translocated hand-reared and wild pheasant hens to southern Finland (60°N, 24°E) and hand-reared ones to c[...]
Article
Hannu Poysa, Auteur ; Veli-Matti Vaananen, AuteurA multitude of anthropogenic factors are threatening bird populations but their roles as drivers of population changes are generally poorly understood. Several duck species, for instance, have unfavorable conservation status at the Pan-European [...]
Article
Matthieu Guillemain, Auteur ; Jean-Maxime Bertout, Auteur ; Thomas Kjaer Christensen, Auteur ; Hannu Poysa, Auteur ; Veli-Matti Vaananen, Auteur ; Patrick Triplet, Auteur ; Vincent Schricke, Auteur ; Anthony D. Fox, AuteurAutumn postnuptial migration is critical in the dabbling duck annual cycle, when first-year birds in particular suffer high losses to natural and hunting mortality. Mortality rates in this age-class are generally unknown in Europe where winter r[...]
Article
Petri Nummi, Auteur ; Veli-Matti Vaananen, Auteur ; Raimo Pakarinen, Auteur ; Esa Pienmunne, AuteurHuman actions, such as increasing recreational activity at lakes, have resulted in a deterioration in the quality of diver breeding grounds. We studied the breeding success of Red-throated Divers during 1994-2011 in Nuuksio National park in Sout[...]
