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Background

The loss of traditional agropastoral systems, with the consequent reduction of foraging habitats and prey availability, is one of the main causes for the fast decline of Lesser Kestrel (Falco naumanni). To promote the conservation of the Lesser Kestrel and their habitats, here we studied the foraging activities patterns of this species during the breeding season.

Methods

Between 2016 and 2017, we captured and tagged 24 individuals with GPS dataloggers of two colonies in Villena (eastern Spain) with the goals of estimating the home range sizes of males and females, evaluating the differences in spatial ecology between two colonies located in different environments: natural and beside a thermosolar power plant, and investigating habitat selection.

Results

Considering the distances before July 15, date until which it can be assured that the chicks remain in the nest in our colonies, there were significant differences with the distances to the nest in relation to the colony of the individuals: Lesser Kestrels from the thermosolar power plant colony had a greater average distance. The average size of home range areas was 13.37 km2 according to 95% kernel, and there were also significant differences in relation to colony: the individuals from the thermosolar power plant colony used a larger area (22.03± 4.07 km2) than those from the other colony (9.66± 7.68 km2). Birds showed preference for non-irrigated arable lands and pastures.

Conclusions

Despite the differences between the two colonies, the home ranges of both are smaller or similar to those observed in other European colonies. This suggests that Lesser Kestrels continue to have adequate habitats and a good availability of prey. Therefore, the extension and proximity of the plant does not imply a great alteration, which highlights the importance of maintaining the rest of the territory in good conditions to minimize the impact.


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How can the home range of the Lesser Kestrel be affected by a large civil infrastructure?

Show Author's information Javier Vidal-Mateo( )Marta RomeroVicente Urios
Vertebrates Zoology Research Group, University of Alicante, Alicante, Spain

Abstract

Background

The loss of traditional agropastoral systems, with the consequent reduction of foraging habitats and prey availability, is one of the main causes for the fast decline of Lesser Kestrel (Falco naumanni). To promote the conservation of the Lesser Kestrel and their habitats, here we studied the foraging activities patterns of this species during the breeding season.

Methods

Between 2016 and 2017, we captured and tagged 24 individuals with GPS dataloggers of two colonies in Villena (eastern Spain) with the goals of estimating the home range sizes of males and females, evaluating the differences in spatial ecology between two colonies located in different environments: natural and beside a thermosolar power plant, and investigating habitat selection.

Results

Considering the distances before July 15, date until which it can be assured that the chicks remain in the nest in our colonies, there were significant differences with the distances to the nest in relation to the colony of the individuals: Lesser Kestrels from the thermosolar power plant colony had a greater average distance. The average size of home range areas was 13.37 km2 according to 95% kernel, and there were also significant differences in relation to colony: the individuals from the thermosolar power plant colony used a larger area (22.03± 4.07 km2) than those from the other colony (9.66± 7.68 km2). Birds showed preference for non-irrigated arable lands and pastures.

Conclusions

Despite the differences between the two colonies, the home ranges of both are smaller or similar to those observed in other European colonies. This suggests that Lesser Kestrels continue to have adequate habitats and a good availability of prey. Therefore, the extension and proximity of the plant does not imply a great alteration, which highlights the importance of maintaining the rest of the territory in good conditions to minimize the impact.

Keywords: Environmental impact, Conservation, Compensatory measures, Mediterranean landscape, Raptors

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Publication history
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Publication history

Received: 09 July 2018
Accepted: 29 March 2019
Published: 04 April 2019
Issue date: January 2019

Copyright

© The Author(s) 2019.

Acknowledgements

Acknowledgements

We are grateful to Toni Pérez for his help during all the fieldwork and along all the time. We are thankful to Servicio de Biodiversidad of Conselleria de Agricultura, Medio Ambiente, Cambio Climático y Desarrollo Rural (Generalitat Valenciana), especially to Juan Jiménez and Juan Antonio Gómez for giving all the necessary permissions. We are also thankful to Ruben Limiñana for his advices. This paper is part of the PhD thesis of M. Romero at the University of Alicante.

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