Evidence map›Paper›PMID 28332031›Full record

ReviewJournal of comparative physiology. A, Neuroethology, sensory, neural, and behavioral physiology2017

How do energy stores and changes in these affect departure decisions by migratory birds? A critical view on stopover ecology studies and some future perspectives.

Heiko Schmaljohann, Cas Eikenaar

Abstract readReview
PubMed Publisher
In one paragraph

Review in Journal of comparative physiology. A, Neuroethology, sensory, neural, and behavioral physiology, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 27 papers.

0numbers the graph read from it
0cells of the map it votes in
27citing papers in PubMed
9.3field-weighted citation impact, top 2% 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

27 citing papers in PubMed, 112 citations in OpenAlex.

  1. Article
  2. Article
  3. Conservation-focused mapping of avian migratory routes using a pan-European automated telemetry network.Conservation biology : the journal of the Society for Conservation Biology · 2025
    Article
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  7. Review
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  18. The physiology of movement.Movement ecology · 2020
    Review
  19. Article
  20. Energy Stores, Oxidative Balance, and Sleep in Migratory Garden Warblers (Integrative organismal biology (Oxford, England) · 2020
    Article
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

2 authors at 1 institution in 1 country.

Heiko SchmaljohannInstitute of Avian Research "Vogelwarte Helgoland", An der Vogelwarte 21, 26386, Wilhelmshaven, Germany. heiko.schmaljohann@ifv-vogelwarte.de.ORCID http://orcid.org/0000-0002-0886-4319
Cas EikenaarInstitute of Avian Research "Vogelwarte Helgoland", An der Vogelwarte 21, 26386, Wilhelmshaven, Germany.
Institute of Avian Research · DE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

In birds, accumulating energy is far slower than spending energy during flight. During migration, birds spend, therefore, most of the time at stopover refueling energy used during the previous flight. This elucidates why current energy stores and actual rate of accumulating energy are likely crucial factors influencing bird's decision when to resume migration in addition to other intrinsic (sex, age) and extrinsic (predation, weather) factors modulating the decision within the innate migration program. After first summarizing how energy stores and stopover durations are generally determined, we critically review that high-energy stores and low rates of accumulating energy were significantly related to high departure probabilities in several bird groups. There are, however, also many studies showing no effect at all. Recent radio-tracking studies highlighted that migrants leave a site either to resume migration or to search for a better stopover location, so-called "landscape movements". Erroneously treating such movements as departures increases the likelihood of type II errors which might mistakenly suggest no effect of either trait on departure. Furthermore, we propose that energy loss during the previous migratory flight in relation to bird's current energy stores and migration strategy significantly affects its urge to refuel and hence its departure decision.

Indexed as

Animal MigrationAnimalsBirdsDecision MakingEnergy IntakeEnergy MetabolismDepartureEnergy storesMigrationRate of accumulating energyStopover

Identifiers

PMID28332031
OpenAlexW2599877127

What OpenQuestion holds

Textmetadata
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.