Delineating large-scale migratory connectivity of reed warblers using integrated multistate models

0464521 - ÚBO 2018 RIV GB eng J - Journal Article
Procházka, Petr - Hahn, S. - Rolland, S. - van der Jeugd, H. - Csörgö, T. - Jiguet, F. - Mokwa, T. - Liechti, F. - Vangeluwe, D. - Korner-Nievergelt, F.
Delineating large-scale migratory connectivity of reed warblers using integrated multistate models.
Diversity and Distributions. Roč. 23, č. 1 (2017), s. 27-40. ISSN 1366-9516. E-ISSN 1472-4642
R&D Projects: GA ČR GA13-06451S
Institutional support: RVO:68081766
Keywords : Acrocephalus scirpaceus * band encounter data * bird migration * loop migration * migratory connectivity * ring recovery data * ring recovery model * species distribution * survival
OECD category: Ecology
Impact factor: 4.614, year: 2017

Assessing the extent of large-scale migratory connectivity is crucial for
understanding the evolution of migratory systems and effective species conservation. It has been, however, difficult to elucidate the annual whereabouts of migratory populations of small animals across the annual cycle. Here, we use the reed warbler (Acrocephalus scirpaceus) as one of the most frequently ringed passerines in Europe to demonstrate how ring re-encounter and geolocator data can be used to effectively quantify range-wide distribution of different populations.
Birds were ringed across Europe and re-encountered in Europe, Africa and the Middle East. We employed multistate models which quantify range-wide distribution of different breeding populations while accounting for the spatial and temporal heterogeneity in the re-encounter probabilities and differential age-specific survival during migratory and non-migratory periods. In addition, we integrated geolocator and breeding abundance data as well as human population density to provide a realistic picture of the year-round distribution of the reed warbler, a trans-Saharan migrant.
Our modelling approach revealed frequent use of the western Mediterranean
flyway for the majority of western European populations, but a higher absolute number of reed warblers used the eastern flyway. Further, many populations used different stopover areas during post- and pre-breeding migration, resulting in an anticlockwise loop migration pattern.
The integrative modelling framework helped us to depict the range-wide migration pattern more realistically than raw ring re-encounter data would allow.
Permanent Link: http://hdl.handle.net/11104/0263411