Search Foraging Strategies of Migratory Raptors Under Different Environmental Conditions
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Título: | Search Foraging Strategies of Migratory Raptors Under Different Environmental Conditions |
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Autor/es: | Vidal-Mateo, Javier | Benavent Corai, José | López-López, Pascual | García Ripollés, Clara | Mellone, Ugo | Puente, Javier de la | Bermejo, Ana | Urios, Vicente |
Grupo/s de investigación o GITE: | Zoología de Vertebrados |
Centro, Departamento o Servicio: | Universidad de Alicante. Departamento de Ciencias Ambientales y Recursos Naturales |
Palabras clave: | Lévy | Brownian | GPS satellite telemetry | Raptors | Animal movement | Diet |
Área/s de conocimiento: | Zoología |
Fecha de publicación: | 28-mar-2022 |
Editor: | Frontiers Media |
Cita bibliográfica: | Vidal-Mateo J, Benavent-Corai J, López-López P, García-Ripollés C, Mellone U, De la Puente J, Bermejo A and Urios V (2022) Search Foraging Strategies of Migratory Raptors Under Different Environmental Conditions. Front. Ecol. Evol. 10:666238. doi: 10.3389/fevo.2022.666238 |
Resumen: | Several studies have shown in different organisms how their movements can be fitted to different patterns to optimize search of food resources. According to abundance and availability of resources, different strategies will be optimal, such as Lévy and Brownian random search. We analyze the movement patterns of four species of migratory raptors with different degrees of ecological specialization in diet during the breeding and wintering periods to evaluate the differences according to species and season: the Egyptian Vulture, the Short-toed Snake Eagle, the Booted Eagle, and the Red Kite. From GPS locations, we obtained a set of segments and lengths that were analyzed to verify their fitting to the functions of Lévy and Brownian strategies. Egyptian Vulture’s trajectories fitted to both patterns during the breeding period, whereas during the wintering period most trajectories fitted a Brownian pattern. In the case of the Short-toed Eagle, fit was greater to a Lévy strategy throughout the year, while Booted Eagles and Red Kites exhibited a combination of search patterns. These differences could be accounted for different feeding strategies and environmental context over the annual cycle. In species with a specialized diet (i.e., Short-toed Eagle) the Lévy pattern would maximize the encounters with scarce and unpredictable resources, whereas for species with a broad trophic niche (i.e., Booted Eagle and Red Kite), movements could be adapted to exploit different resources according to their abundance. Scavengers like the Egyptian Vulture shift also between search strategies according to the distribution of carrion. Therefore, the analysis of food search patterns can be used as an indirect indicator to track changes in food availability across a broad range of environmental conditions. This is particularly important under the current context of global change which is largely expected to affect migratory species that spend their vital cycle in distant areas. |
Patrocinador/es: | Tracking of Booted Eagles and Red Kites has been made within the “Migra” program (www.migraciondeaves.org/en/) developed by SEO/BirdLife and financed by Fundación Iberdrola España. The Basque Government and the Biodiversity Foundation financed the tagging of several Red Kites in Spain. Tracking of Italian individuals was funded by Gallipoli Cognato Piccole Dolomiti Lucane Regional Park (Italy). Servicio de Vida Silvestre (Generalitat Valenciana) and different local governments funded part of the tagging. JV-M was supported by a FPU grant of Spanish Ministry of Education (reference FPU014/04671). |
URI: | http://hdl.handle.net/10045/122736 |
ISSN: | 2296-701X |
DOI: | 10.3389/fevo.2022.666238 |
Idioma: | eng |
Tipo: | info:eu-repo/semantics/article |
Derechos: | © 2022 Vidal-Mateo, Benavent-Corai, López-López, García-Ripollés, Mellone, De la Puente, Bermejo and Urios. This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms. |
Revisión científica: | si |
Versión del editor: | https://doi.org/10.3389/fevo.2022.666238 |
Aparece en las colecciones: | INV - ZV - Artículos Científicos |
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