Evidence map›Paper›PMID 32898456›Full record

ArticleBiology letters2020

Extreme and variable torpor among high-elevation Andean hummingbird species.

Blair O Wolf, Andrew E McKechnie, C Jonathan Schmitt, Zenon J Czenze, Andrew B Johnson, Christopher C Witt

Abstract read
In one paragraph

Article in Biology letters, 2020. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 15 papers.

0numbers the graph read from it
0cells of the map it votes in
15citing papers in PubMed
–field-weighted citation impact
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

15 citing papers in PubMed.

  1. Article
  2. Coping with the cold: black-capped chickadees (Poecile atricapillus) use rapid facultative hypothermia to reduce fat loss overnight.Journal of comparative physiology. B, Biochemical, systemic, and environmental physiology · 2026
    Article
  3. Article
  4. Review
  5. Article
  6. Article
  7. Article
  8. Article
  9. Article
  10. State dependence of arousal from torpor in brown long-eared bats (Plecotus auritus).Journal of comparative physiology. B, Biochemical, systemic, and environmental physiology · 2022
    Article
  11. Review
  12. Article
  13. Article
  14. Article
  15. Review
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.

Blair O WolfDepartment of Biology, University of New Mexico, MSC03-2020, Albuquerque, NM 87131-0001, USA.
Andrew E McKechnieSouth African Research Chair in Conservation Physiology, South African National Biodiversity Institute, PO Box 754, Pretoria 0001, South Africa.
C Jonathan SchmittDepartment of Biology, University of New Mexico, MSC03-2020, Albuquerque, NM 87131-0001, USA.
Zenon J CzenzeSouth African Research Chair in Conservation Physiology, South African National Biodiversity Institute, PO Box 754, Pretoria 0001, South Africa.
Andrew B JohnsonDepartment of Biology, University of New Mexico, MSC03-2020, Albuquerque, NM 87131-0001, USA.
Christopher C WittDepartment of Biology, University of New Mexico, MSC03-2020, Albuquerque, NM 87131-0001, USA.

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Torpor is thought to be particularly important for small endotherms occupying cold environments and with limited fat reserves to fuel metabolism, yet among birds deep torpor is both rare and variable in extent. We investigated torpor in hummingbirds at approximately 3800 m.a.s.l. in the tropical Andes by monitoring body temperature (

Indexed as

TorporAnimalsBirdsBody TemperatureBody Temperature RegulationHumansMammalsPhylogenybody temperatureevolutionheterothermyhypometabolismthermoregulationTrochilidae

Identifiers

PMID32898456
PMCPMC7532710

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.