Evidence map›Paper›PMID 31758057›Full record

ArticleScientific reports2019

When and where mortality occurs throughout the annual cycle changes with age in a migratory bird: individual vs population implications.

Fabrizio Sergio, Giacomo Tavecchia, Alessandro Tanferna, Julio Blas, Guillermo Blanco, Fernando Hiraldo

Open access · goldAbstract read
In one paragraph

Article in Scientific reports, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 20 papers.

0numbers the graph read from it
0cells of the map it votes in
20citing papers in PubMed
6.6field-weighted citation impact, top 3% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

20 citing papers in PubMed, 80 citations in OpenAlex.

  1. Estimating seasonal survival of migratory birds using continuous-time capture-recapture models.Ecological applications : a publication of the Ecological Society of America · 2026
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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

6 authors at 3 institutions in 1 country.

Fabrizio SergioDepartment of Conservation Biology, Estación Biológica de Doñana - CSIC, C/Americo Vespucio 26, 41092, Seville, Spain. fsergio@ebd.csic.es.
Giacomo TavecchiaAnimal Demography and Ecology Unit (GEDA), IMEDEA (CSIC/UIB), C/M. Marques 21, 07190, Esporles, Spain.
Alessandro TanfernaDepartment of Conservation Biology, Estación Biológica de Doñana - CSIC, C/Americo Vespucio 26, 41092, Seville, Spain.
Julio BlasDepartment of Conservation Biology, Estación Biológica de Doñana - CSIC, C/Americo Vespucio 26, 41092, Seville, Spain.
Guillermo BlancoDepartment of Evolutionary Ecology, Museum of Natural Sciences, CSIC, C/José Gutiérrez Abascal 2, 28006, Madrid, Spain.
Fernando HiraldoDepartment of Conservation Biology, Estación Biológica de Doñana - CSIC, C/Americo Vespucio 26, 41092, Seville, Spain.
Estación Biológica de Doñana · ESMediterranean Institute for Advanced Studies · ESMuseo Nacional de Ciencias Naturales · ES

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

The annual cycle of most animals is structured into discrete stages, such as breeding, migration and dispersal. While there is growing appreciation of the importance of different stages of an organism's annual cycle for its fitness and population dynamics, almost nothing is known about if and how such seasonal effects can change through a species lifespan. Here, we take advantage of the opportunity offered by a long-term satellite/GPS-tracking study and a reliable method of remote death-detection to show that certain stages of both the annual and life cycle of a migratory long-lived raptor, the Black kite Milvus migrans, may represent sensitive bottlenecks for survival. In particular, migratory journeys caused bursts of concentrated-mortality throughout life, but the relative importance of stage-specific survival changed with age. On the other hand, the balance between short-stages of high mortality and long-stages of low mortality made population-growth similarly dependent on all portions of the annual cycle. Our results illustrate how the population dynamics of migratory organisms can be inextricably linked to ecological pressures balanced over multiple stages of the annual cycle and thus multiple areas of the globe, suggesting the frequent need for challenging conservation strategies targeting all portions of a species year-round range.

Indexed as

MortalitySeasonsAfrica, WesternAge FactorsAnimal MigrationAnimalsBirdsGeographic Information SystemsGeographyLongevityMauritaniaMoroccoPopulation DynamicsRaptorsReproductionSpain

Identifiers

PMID31758057
PMCPMC6874661
OpenAlexW2991347486

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.