Pattern of goshawk Accipiter gentilis predation on four forest grouse species in northern Finland

@article{Tornberg2001PatternOG,
  title={Pattern of goshawk Accipiter gentilis predation on four forest grouse species in northern Finland},
  author={Risto Tornberg},
  journal={Wildlife Biology},
  year={2001},
  volume={7},
  pages={245 - 256}
}
  • R. Tornberg
  • Published 1 December 2001
  • Biology
  • Wildlife Biology
I studied predator-prey relationships between goshawk Accipiter gentilis and four species of forest grouse (Tetraonidae) in northern Finland during 1988–1998. The main purpose of my study was to evaluate the impact of goshawk predation and its possible effect on multiannual cycling patterns in grouse numbers. Theoretically specialist predators should tend to cause stable-limit cycles in prey populations if there is a time-lag in the predator's response to prey density and the prey species… Expand
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This study studies the population dynamics of a predator–prey setting in Finland by fitting first-order log-linear vector autoregressive models to long-term count data from active breeding sites of the northern goshawk and three of its main prey species, which belong to the same forest grouse guild and show synchronous fluctuations. Expand
Delayed numerical response of goshawks to population fluctuations of forest grouse
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In northern Europe with few alternative preys, goshawk predation might contribute to the generation of multiannual cycles of forest grouse, and this should be tested experimentally. Expand
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What Explains Forest GrouseMortality : Predation Impacts of Raptors , Vole Abundance , orWeather Conditions ?
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The results appear to support APH rather than SPH and indicate that predation by buzzards may dampen population cycles of main prey (voles) but amplify population fluctuations of grouse. Expand
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It is concluded that the common buzzard needs to balance the risks of IG predation and interference competition with the availability of its own resources, and the presence of other predators associated with high food levels may impede a subordinate predator taking full advantage of the available food. Expand
Landscape and season effects on the diet of the Goshawk.
TLDR
The final outcome of these landscape-related predator–prey interactions is likely to depend on direct functional and numerical responses of predators to the variation in the abundance and vulnerability of the main and alternative prey, as well as on the indirect controlling effect of top predators on smaller predators and nest predators. Expand
What Explains Forest Grouse Mortality: Predation Impacts of Raptors, Vole Abundance, or Weather Conditions?
TLDR
It is concluded that the among-year survival pattern of juvenile forest grouse may largely be determined by raptor predation, with some support for APH. Expand
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A clear difference in the survival of young and older females during late winter, a decrease in female survival during spring, and variation between the study years are shown. Expand
Effects of forest characteristics on ruffed grouse nesting ecology in central Maine, USA
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The results demonstrate the importance of forest characteristics on multiple components of species' nesting ecology, and management suggestions to promote attractive ruffed grouse nesting habitat while potentially mitigating sources of nesting failure are provided. Expand
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