Search results for "biologging"
showing 3 items of 3 documents
Multispecies tracking reveals a major seabird hotspot in the North Atlantic
2021
The conservation of migratory marine species, including pelagic seabirds, is challenging because their movements span vast distances frequently beyond national jurisdictions. Here, we aim to identify important aggregations of seabirds in the North Atlantic to inform ongoing regional conservation efforts. Using tracking, phenology, and population data, we mapped the abundance and diversity of 21 seabird species. This revealed a major hotspot associated with a discrete area of the subpolar frontal zone, used annually by 2.9–5 million seabirds from ≥56 colonies in the Atlantic: the first time this magnitude of seabird concentrations has been documented in the high seas. The hotspot is temporal…
Tri-axial accelerometry shows differences in energy expenditure and parental effort throughout the breeding season in long-lived raptors
2021
Cutting-edge technologies are extremely useful to develop new workflows in studying ecological data, particularly to understand animal behavior and movement trajectories at the individual level. Although parental care is a well-studied phenomenon, most studies have been focused on direct observational or video recording data, as well as experimental manipulation. Therefore, what happens out of our sight still remains unknown. Using high-frequency GPS/GSM dataloggers and tri-axial accelerometers we monitored 25 Bonelli’s eagles Aquila fasciata during the breeding season to understand parental activities from a broader perspective. We used recursive data, measured as number of visits and resi…
Chapter 24. Lesser kestrel Falco naumanni
2021
The lesser kestrel is a small colonial falcon with a broad breeding distribution range, extending from the Iberian Peninsula to eastern China. Most of the biological and ecological knowledge concerning this species, including migration, has been obtained from European populations. After the end of each breeding season, these populations move preferentially northward, showing pre-migratory movements (of 100–1,000 km) that are necessary to reach rich foraging grounds where they can fuel before commencing the true migration towards Africa. European lesser kestrels migrate on a broad front across the Mediterranean Sea. There is a strong connectivity between European breeding and African non-bre…