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DIGITAL.CSIC
Article . 2022 . Peer-reviewed
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Efecto de la gestión forestal sobre el éxito reproductor del aguililla calzada Hieraaetus pennatus en el valle del Tiétar

Authors: García Dios, Ignacio Santiago; Viñuela, Javier;

Efecto de la gestión forestal sobre el éxito reproductor del aguililla calzada Hieraaetus pennatus en el valle del Tiétar

Abstract

[ES] Estudiamos la variación en parámetros reproductores (tamaño de puesta, número de huevos eclosionados y mortalidad de pollos) del Aguililla Calzada en el valle del Tiétar abulense. Encontramos variación interanual significativa en el tamaño de puesta y la mortalidad de pollos, posiblemente asociada a la meteorología. Las lluvias en la primavera temprana en climas mediterráneos podrían tener un efecto positivo sobre el tamaño de puesta. En cambio, las lluvias durante el periodo de crecimiento de los pollos pueden afectar negativamente a la productividad por dificultar los vuelos de caza. Los nidos que estuvieron sometidos a molestias producidas por actividades de gestión forestal (corta de pinos, resineo del árbol del nido y limpieza de matorral) tuvieron menor tamaño de puesta y menor número de pollos nacidos. Además, las parejas en territorios que sufrieron este tipo de molestias tendían a cambiar de nido al año siguiente con mayor frecuencia que las que no sufrieron molestias. El efecto negativo de estas actividades puede ser especialmente importante en años con lluvias abundantes durante periodos críticos (etapas tempranas del proceso reproductor). Se discuten posibles medidas a adoptar para evitar este problema, que puede afectar tanto a ésta, como a otras especies de rapaces forestales.

[EN] The variation in breeding success (clutch size, number of eggs hatched, and nestling mortality) of Booted eagles was studied in the Tietar valley (Avila, central Spain). We found significant year to year variation in clutch size and nestling mortality, probably associated to weather. Rainfall during early spring in mediterranean climates can be associated to large clutch sizes. On the contrary, rainfall during the nestling period may increase mortality through negative effects on hunting performance. Forest management activities in the surroundings of nests (tree-felling, resin extraction, and bush clearing) negatively affected clutch size and number of hatched eggs. Furthermore, pairs nesting on territories affected by those activities tended to change the nest on the following nesting season more frecuently than unaffected pairs. The negative effect of forest management may be especially marked on years with abundant rainfall on critical periods (early stages of the breeding process). Possible management measures to reduce these effects are proposed.

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
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