Evidence map›Paper›PMID 34335298›Full record

ArticleFrontiers in physiology2021

Inferring Whole-Organism Metabolic Rate From Red Blood Cells in Birds.

Kasja Malkoc, Stefania Casagrande, Michaela Hau

Open access · goldAbstract read
In one paragraph

Article in Frontiers in physiology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 18 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
18citing papers in PubMed, 1 pooled it
4.4field-weighted citation impact, top 5% 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

18 citing papers in PubMed, 1 synthesis or guideline pooled it, 35 citations in OpenAlex.

  1. Pooled it
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  4. Photoperiod, but not testosterone, increases basal metabolic rate in house sparrows.Integrative organismal biology (Oxford, England) · 2026
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  12. Non-lethal sampling for assessment of mitochondrial function does not affect metabolic rate and swimming performance.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2024
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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

3 authors at 1 institution in 1 country.

Kasja MalkocResearch Group for Evolutionary Physiology, Max Planck Institute for Ornithology, Seewiesen, Germany.
Stefania CasagrandeResearch Group for Evolutionary Physiology, Max Planck Institute for Ornithology, Seewiesen, Germany.
Michaela HauResearch Group for Evolutionary Physiology, Max Planck Institute for Ornithology, Seewiesen, Germany.
Max Planck Institute for Ornithology · DE

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Metabolic rate is a key ecological variable that quantifies the energy expenditure needed to fuel almost all biological processes in an organism. Metabolic rates are typically measured at the whole-organism level (woMR) with protocols that can elicit stress responses due to handling and confinement, potentially biasing resulting data. Improved, non-stressful methodology would be especially valuable for measures of field metabolic rate, which quantifies the energy expenditure of free-living individuals. Recently, techniques to measure cellular metabolic rate (cMR) in mitochondria of blood cells have become available, suggesting that blood-based cMR can be a proxy of organismal aerobic performance. Aerobic metabolism actually takes place in the mitochondria. Quantifying cMR from blood samples offers several advantages such as direct estimates of metabolism and minimized disturbance of individuals. To our knowledge, the hypothesis that blood-based cMR correlates with woMR has not yet been directly tested. We measured cMR in red blood cells of captive great tits (

Indexed as

aerobic metabolismavian erythrocytesglucocorticoidsmitochondriarespirometrystress response

Identifiers

PMID34335298
PMCPMC8322697
OpenAlexW3186203585

What OpenQuestion holds

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LicenceCC BY
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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.