Eagle Owl Bubo bubo proximity can lower productivity of cliff-nesting Peregrines Falco peregrinus

Kirjoittajat

  • M. Brambilla
  • D. Rubolini
  • F. Guidali

Abstrakti

The Eagle Owl Bubo bubo is conventionally regarded as an important predator of smaller diurnal birds of prey. In this study, we analysed the relationships between Peregrine pro-ductivity and the proximity to Eagle Owl nests/cliffs in a cliff-nesting Peregrine Falco peregrinus population across the central pre-Alps of Italy and Switzerland over three breeding seasons. There was no effect of Eagle Owls on Peregrine productivity over the whole study area, whereas in a restricted sub-area, where both species occurred at higher densities, proximity to Eagle Owl nests/cliffs and syntopic co-occurrence of the two spe-cies at a given cliff complex resulted in lower Peregrine productivity. Eagle Owl effects at the wider scale were probably masked by other ecological and/or environmental features affecting reproductive success of the Peregrine, whereas these became evident when fo-cusing on a more restricted and homogeneous area. Thus, our study suggests that Eagle Owls may affect population dynamics of diurnal raptors via an effect on productivity.
Osasto
Artikkelit

Julkaistu

2006-03-31

Viittaaminen

Brambilla, M., Rubolini, D., & Guidali, F. (2006). Eagle Owl Bubo bubo proximity can lower productivity of cliff-nesting Peregrines Falco peregrinus. Ornis Fennica, 83(1), 20–26. Noudettu osoitteesta https://ornisfennica.journal.fi/article/view/133650