ArticleEcology and evolution2021
Comparing population trend estimates of migratory birds from breeding censuses and capture data at a spring migration bottleneck.
Article in Ecology and evolution, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 7 papers.
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7 citing papers in PubMed.
- Wind conditions shape co-migration fidelity in trans-Saharan birds at a Mediterranean stopover site.Royal Society open science · 2026Article
- Wild Bird Reproduction: Neuroendocrinology, Conservation Biology, and Environmental Threats.Advances in experimental medicine and biology · 2026Review
- Berries to Go: Distinct Passerine Spring Migration Frugivory at a Main Mediterranean Stopover Site.Ecology and evolution · 2025Article
- Constitutive immune function is not associated with fuel stores in spring migrating passerine birds.Ecology and evolution · 2024Article
- Co-migration fidelity at a stopover site increases over time in African-European migratory landbirds.Royal Society open science · 2023Article
- Diet of breeding Eleonora's falconEcology and evolution · 2022Article
- Comparing population trend estimates of migratory birds from breeding censuses and capture data at a spring migration bottleneck.Ecology and evolution · 2021Article
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9 authors.
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Abstract
Europe has a well-established network of breeding bird monitoring that is used to produce supranational indices of population trends for many species. However, a comparison of breeding bird censuses with other methods may be beneficial to confirm the validity of such indices. The aim of this study was to assess the value of standardized capture data of migratory birds at migration bottlenecks as an indicator of the effective breeding populations. One limitation to this method is that several populations are co-occurring at these bottlenecks and their catchment areas need to be clearly identified to allow extrapolation of population indices. Here, we used standardized trends in capture numbers of 30 species on the island of Ponza, a migration bottleneck in the central Mediterranean, and compared them to population trends estimated in the putative catchment breeding areas between 2005 and 2016. The catchment areas were identified through the analysis of ring recoveries during the breeding season of birds passing through Ponza. Our results show an agreement between the population trends observed on Ponza and those in the breeding areas in 15 out of 30 species. The correlations were strongest in species with a more robust definition of the catchment areas, that is, species with more than 10 recoveries, and for which the recoveries were most likely of breeding birds. The main reason for disagreement between the two indices in the remaining species might be related to different intensity of sampling in different areas. This issue can be solved by further developing monitoring projects in underrepresented countries, as well as by intensifying monitoring through ringing, both in the breeding grounds and at migration bottlenecks. These results show that spring migration monitoring at bottlenecks has the potential to provide a valuable complement and an independent control of breeding bird surveys, allowing raising early warnings of population declines and contributing to their conservation.
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