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Auteur Risto Tornberg |
Documents disponibles écrits par cet auteur (11)
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Article
Jere Tolvanen, Auteur ; Veli-Matti Pakanen, Auteur ; Jari Valkama, Auteur ; Risto Tornberg, AuteurCapsule: Mark–recapture data suggest low apparent survival and sex- and population-specific site fidelity and territory turnover in adult Northern Goshawks Accipiter gentilis breeding in northern Europe.Aims: To understand how species cope with [...]Article
Peregrine Falcon (Falco peregrinus) may affect local demographic trends of wetland bird prey species
Risto Tornberg, Auteur ; Veli-Matti Korpimäki, Auteur ; Pentti Rauhala, Auteur ; Seppo Rytkönen, AuteurArticle
Peregrine Falcon (Falco peregrinus) may affect local demographic trends of wetland bird prey species
Risto Tornberg, Auteur ; Veli-Matti Korpimäki, Auteur ; Pentti Rauhala, Auteur ; Seppo Rytkönen, AuteurThe demographic value of existing habitat can be affected by changes in predator populations. In Finland, wader populations increased when the Peregrine Falcon (Falco peregrinus) declined, due to poisoning by agricultural chemicals during the 19[...]Article
Risto Tornberg, Auteur ; Seppo Rytkönen, Auteur ; Panu Välimäki, Auteur ; Jari Valkama, Auteur ; Pekka Helle, AuteurAround the nests of many birds of prey the pressure of nest predators is decreased. This attracts other bird species to breed near nests of those birds of prey in order to benefit from protection conferred. This study examines the possible prote[...]Article
Risto Tornberg, Auteur ; Seppo Rytkönen, Auteur ; Panu Välimäki, Auteur ; Jari Valkama, Auteur ; Pekka Helle, AuteurAround the nests of many birds of prey the pressure of nest predators is decreased. This attracts other bird species to breed near nests of those birds of prey in order to benefit from protection conferred. This study examines the possible prote[...]Article
Risto Tornberg, Auteur ; Vitali Reif, AuteurPrey remains and regurgitated pellets collected from nests are the most common material for investigating the diet of birds of prey. Generally such data is thought to be biased with large prey overrepresented. However, there is no analysis inves[...]Article
Risto Tornberg, Auteur ; Seppo Haapala, AuteurThe Marsh Harrier Circus aeruginosus population has expanded rapidly during the last decades in northern Finland. We studied the diet of Marsh Harrier during the breeding seasons 2002-2009 on the isle of Hailuoto in the Gulf of Bothnia in Finlan[...]Article
Anders Pape Moller, Auteur ; Tapio Solonen, Auteur ; Patrik Byholm, Auteur ; Esa Huhta, Auteur ; Jan Tottrup Nielsen, Auteur ; Risto Tornberg, AuteurPredators impose strong selection on their prey, regulate prey populations and engage in coevolutionary interactions with their prey. The intensity of selection and the strength of coevolutionary interactions will depend on how stringent predato[...]