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Documents disponibles écrits par cet auteur (10)
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Article
Mari Rajala, Auteur ; Santtu Kareksela, Auteur ; Osmo Ratti, Auteur ; Jukka Suhonen, AuteurSurvivorship in animals depends on both foraging activities and avoidance of predation, and thus behavioural decisions often reflect a trade-off between predation risk and foraging efficiency. In this experimental study, we compared behavioural [...]
Article
Teija Aho, Auteur ; Markku Kuitunen, Auteur ; Jukka Suhonen, Auteur ; Ari Jantti, AuteurBrood size of Eurasian Treecreepers Certhia familiaris was manipulated in three years that differed in food abundance in order to detect factors that limit clutch size. The Treecreeper parents were able to successfully raise enlarged broods only[...]
Article
Milla Hilli-Lukkarinen, Auteur ; Markku Kuitunen, Auteur ; Jukka Suhonen, AuteurEffects of different land-use types on nutrient and chemical run-off have been widely researched, but the total effect of changes in land use on communities of aquatic species is poorly known. We evaluated the effect of land-use change on waterf[...]
Article
Santtu Kareksela, Auteur ; Oskari Harma, Auteur ; Carita Lindstedt, Auteur ; Heli Siitari, Auteur ; Jukka Suhonen, AuteurOne suggested anti-predator function of alarm calls is to deliver a message to a predator that it has been detected. Moreover, giving the alarm call could provide a signal to the predator that capturing the individual giving the alarm is more di[...]
Article
Robin J. Kubitza, Auteur ; Jukka Suhonen, Auteur ; Timo Vuorisalo, AuteurEstablishment of dominance hierarchies has been proposed as a mechanism that stabilizes and maintains social groups by reducing physical intra-group conflicts. However, the exact behavioural processes involved in hierarchy formation within natur[...]
Article
Teija Aho, Auteur ; Markku Kuitunen, Auteur ; Tomi Hakkari, Auteur ; Jukka Suhonen, Auteur ; Ari Jantti, AuteurIn biparental bird species the optimal level of parental care of one member of the pair generally depends on its mate's strategy. In monogamy, a predicted response to reduced parental care by one parent is incomplete compensation by its partner.[...]
Article
Ari Jantti, Auteur ; Harri Hakkarainen, Auteur ; Markku Kuitunen, Auteur ; Jukka Suhonen, AuteurForest loss and fragmentation induces harmful ecological effects especially for species preferring mature forests. The Eurasian Treecreeper, Certhia familiaris, is highly specialised in foraging on large tree trunks and can only occasionally for[...]
Article
Matti Halonen, Auteur ; Tapio Mappes, Auteur ; Taru Meri, Auteur ; Jukka Suhonen, AuteurVoles are the most preferred prey of Pygmy Owls (Glaucidium passerinum) in Northern Europe, where the extensive snow cover may decrease the availability of voles. Snow cover may thus cause changes in the diet from what is expected on the basis o[...]
Article
Jukka Suhonen, Auteur ; Matti Halonen, Auteur ; Tapio Mappes, Auteur ; Erkki Korpimaeki, AuteurTo test whether competitive and predatory interactions limit larder size we erected pygmy owl Glaucidium passerinum nest-boxes for hoarding with
Article
Oskari Harma, Auteur ; Santtu Kareksela, Auteur ; Heli Siitari, Auteur ; Jukka Suhonen, AuteurBirds rely mainly on their vision when foraging. Many diurnal raptors use ultraviolet (UV) vision and ultraviolet-reflecting vole scent marks to find suitable hunting areas, whereas nocturnal owls seem to lack this ability. We studied if the diu[...]
