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Top Predators as Conservation Tools: Ecological Rationale, Assumptions, and Efficacy
Evidence suggests that top predators may function as structuring agents and biodiversity indicators in some ecosystems but not others, and that they perform poorly as umbrella species; more consensus exists for their efficacy as sentinel and flagship species.
Occupancy as a measure of territory quality
Summary 1. Territory quality may affect individual fitness and contribute to density-dependent reproduction, with repercussions on population regulation. We investigated the probable causes and…
Individual improvements and selective mortality shape lifelong migratory performance
It is shown that the development of migratory behaviour follows a consistent trajectory, more gradual and prolonged than previously appreciated, and that this is promoted by both individual improvements and selective mortality, mainly operating in early life and during the pre-breeding migration.
Ecologically justified charisma: preservation of top predators delivers biodiversity conservation
It is suggested that, at least in some biological systems, conservation plans based on apex predators could be implemented to deliver broader biodiversity benefits, and biodiversity levels were consistently higher at sites occupied by top predators.
Adaptive selection of foraging and nesting habitat by black kites (Milvus migrans) and its implications for conservation: a multi-scale approach
Costs and benefits of breeding in human‐altered landscapes for the Eagle Owl Bubo bubo
We studied a population of 23–25 Eagle Owl Bubo bubo pairs between 1994 and 2000 in a 1330-km2 study plot in the central-eastern Italian Alps. Compared to random sites, territories were located at…
Intraguild predation in raptor assemblages: A review
From a conservation point of view, intraguild predation may limit the success of raptor preservation programmes and could be used as a management tool through its effect on mesopredator release and its potentially positive, indirect effects on game species.
Distribution, density, diet and productivity of the Scops Owl Otus scops in the Italian Alps
The Scops Owl Otus scops is probably the least known European owl. We surveyed Scops Owls in the Trento region (6200 km 2 ) of the central‐eastern Italian Alps between 1995 and 2003 and we…
Sequential settlement and site dependence in a migratory raptor
This work proposes as a general paradigm of sequential settlement the following process: arrival date is a reliable surrogate of phenotype quality, early-arriving individuals have preferential access to the best quality sites and partners, and the above conditions cascade into a number of benefits ultimately related to higher fitness for earlier arriving individuals.
Spatial refugia and the coexistence of a diurnal raptor with its intraguild owl predator
Overall, kites responded to predation risk through predator spatial avoidance, being concentrated in interstitial predationrefugia bordering the core home range of owl pairs, and kite density and productivity were related to a complex interaction of IGP risk and food abundance, and were probably shaped by a mixture of top-down and bottom-up effects.