Using GPS tracking and stable multi-isotopes for estimating habitat use and winter range in Palearctic ospreys.

摘要: We used both satellite tracking and carbon, nitrogen sulphur stable isotopic analysis (SIA) to infer wintering ecology habitat use of the Corsican osprey Pandion haliaetus population. A control sample feathers from 75 individuals was collected within osprey’s northern hemisphere breeding range, assess SIA variability across types. An experimental set on 18 adults examined ground locations types during non-breeding period. calibrated using GPS/GSM tracks 12 Mediterranean adults’ movements as site references. found 50% were resident other half migrated. Ospreys spent winter at temperate latitudes showed a high plasticity in selection spread over basin (marine bays, coastal lagoons/marshland, inland freshwater sites). Complementary GPS tracking, is, broad geographical scale, reliable method determine whether ospreys overwinter different that their area. This study proved integration techniques effective overcoming intrinsic limits each achieving greater information for basic ecological studies migratory birds aquatic environments.