showing 4 related works from this author
Barrier crossings and winds shape daily travel schedules and speeds of a flight generalist
2021
External factors such as geography and weather strongly affect bird migration influencing daily travel schedules and flight speeds. For strictly thermal-soaring migrants, weather explains most seasonal and regional differences in speed. Flight generalists, which alternate between soaring and flapping flight, are expected to be less dependent on weather, and daily travel schedules are likely to be strongly influenced by geography and internal factors such as sex. We GPS-tracked the migration of 70 lesser kestrels (Falco naumanni) to estimate the relative importance of external factors (wind, geography), internal factors (sex) and season, and the extent to which they explain variation in trav…
Diurnal timing of nonmigratory movement by birds: the importance of foraging spatial scales
2020
Timing of activity can reveal an organism's efforts to optimize foraging either by minimizing energy loss through passive movement or by maximizing energetic gain through foraging. Here, we assess whether signals of either of these strategies are detectable in the timing of activity of daily, local movements by birds. We compare the similarities of timing of movement activity among species using six temporal variables: start of activity relative to sunrise, end of activity relative to sunset, relative speed at midday, number of movement bouts, bout duration and proportion of active daytime hours. We test for the influence of flight mode and foraging habitat on the timing of movement activit…
Tratamiento del carcinoma hepatocelular en España. Análisis de 705 casos en 62 centros
2010
Resumen Fundamento y objetivo El carcinoma hepatocelular (CHC) es la principal causa de muerte en pacientes con cirrosis, y su situacion actual en Espana no es bien conocida. Por esto, se ha creado un registro nacional para evaluar las caracteristicas de los pacientes con CHC de novo. Pacientes y metodo Entre el 1 de octubre de 2008 y el 31 de enero de 2009, 62 centros de referencia registraron las caracteristicas demograficas, clinicas y tumorales, la primera opcion de tratamiento y la elegibilidad para el trasplante ortotopico hepatico (TOH) de los CHC diagnosticados en este tiempo. Resultados Se contabilizaron 705 casos nuevos de CHC, un 78% en varones; la edad media era de 65 anos y un …
Broad-front migration leads to strong migratory connectivity in the lesser kestrel (Falco naumanni)
2019
Aim: Migratory animals regularly move between often distant breeding and non‐breeding ranges. Knowledge about how these ranges are linked by movements of individuals from different populations is crucial for unravelling temporal variability in population spatial structuring and for identifying environmental drivers of population dynamics acting at different spatio‐temporal scales. We performed a large‐scale individual‐based migration tracking study of an Afro‐Palaearctic migratory raptor, to determine the patterns of migratory connectivity of European breeding populations. Location: Europe, Africa. Methods: Migration data were recorded using different devices (geolocators, satellite transmi…