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Intra-tropical movements as a beneficial strategy for Palearctic migratory birds
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SYSNO ASEP 0483903 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Intra-tropical movements as a beneficial strategy for Palearctic migratory birds Author(s) Koleček, Jaroslav (UBO-W) RID, ORCID, SAI
Hahn, S. (CH)
Emmenegger, T. (CH)
Procházka, Petr (UBO-W) RID, ORCID, SAINumber of authors 4 Article number 171675 Source Title Royal Society Open Science. - : Royal Society Publishing - ISSN 2054-5703
Roč. 5, č. 171675 (2018)Number of pages 10 s. Language eng - English Country GB - United Kingdom Keywords geolocator ; habitat deterioration ; NDVI ; passerines ; sub-Saharan Africa ; vegetation conditions Subject RIV EG - Zoology OECD category Ornithology R&D Projects GA13-06451S GA ČR - Czech Science Foundation (CSF) Institutional support UBO-W - RVO:68081766 UT WOS 000423777300080 EID SCOPUS 85040064916 DOI 10.1098/rsos.171675 Annotation Migratory birds often move significantly within their non-breeding range before returning to breed. It remains unresolved under which circumstances individuals relocate, whether movement patterns are consistent between populations and to what degree the individuals benefit from the intra-tropical movement (ITM). We tracked adult great reed warblers Acrocephalus arundinaceus from a central and a southeastern European breeding population, which either stay at a single non-breeding site, or show ITM, i.e. move to a second site. We related ITM to the normalized difference vegetation index (NDVI) describing vegetation conditions and probably reflecting food abundance for these insectivorous birds. Three-quarters of birds showed ITM across the non-breeding range. We found no difference in range values and mean values of NDVI between the single non-breeding sites of stationary birds and the two sites of moving birds. The vegetation conditions were better at the second sites compared to the first sites during the period which moving birds spent at the first sites. Vegetation conditions further deteriorated at the first sites during the period the moving birds resided at their second sites. Our study provides evidence that birds probably benefit from improved conditions after ITM compared to the conditions at the sites from where they departed. Workplace Institute of Vertebrate Biology Contact Hana Slabáková, slabakova@ivb.cz, Tel.: 543 422 524 Year of Publishing 2018
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