Post-Fledging Dependence Period of Ospreys Pandion haliaetus Released in Central Italy: Home Ranges, Space Use and Aggregation

摘要: Summary.—Space-use strategies are essential behavioural skills during the fledging-to-dispersal period, when physical capabilities and ability to explore external world developed. Here we describe space-use of 13 radio-tagged ospreys Pandion haliaetus, released as part a reintroduction project in Central Italy, their post-fledging dependence period. The remained within radius about 1 km hacking tower for twenty days after release. Later they began more surroundings. occurrence frequency explorations further than from release point generally increased with time, even though juveniles continued frequent vicinity pens. translocated showed marked aggregation perhaps because period spent at could have reinforced feeling belonging same brood, promoting consequent strong association among young. Also, absence parents may led...