Evidence map›Paper›PMID 19640884›Full record

ArticleProceedings. Biological sciences2009

Evolution of muscle phenotype for extreme high altitude flight in the bar-headed goose.

Graham R Scott, Stuart Egginton, Jeffrey G Richards, William K Milsom

Abstract read
In one paragraph

Article in Proceedings. Biological sciences, 2009. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 47 papers.

0numbers the graph read from it
0cells of the map it votes in
47citing 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

47 citing papers in PubMed.

  1. Article
  2. Article
  3. Comparative mechanisms for OJournal of comparative physiology. B, Biochemical, systemic, and environmental physiology · 2025
    Article
  4. Gas exchange, oxygen transport and metabolism in high-altitude waterfowl.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2025
    Review
  5. Article
  6. Frontiers in cellular and infection microbiology · 2025
    Article
  7. Article
  8. Review
  9. Article
  10. Evolved changes in phenotype across skeletal muscles in deer mice native to high altitude.American journal of physiology. Regulatory, integrative and comparative physiology · 2024
    Article
  11. Article
  12. Article
  13. Article
  14. Article
  15. Article
  16. How does density of the inner mitochondrial membrane influence mitochondrial performance?American journal of physiology. Regulatory, integrative and comparative physiology · 2023
    Review
  17. Article
  18. Parallel genomic responses to historical climate change and high elevation in East Asian songbirds.Proceedings of the National Academy of Sciences of the United States of America · 2021
    Article
  19. Article
  20. 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

4 authors.

Graham R ScottDepartment of Zoology, University of British Columbia, Vancouver V6T 1Z4, Canada. scott@zoology.ubc.ca
Stuart Egginton
Jeffrey G Richards
William K Milsom

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Bar-headed geese migrate over the Himalayas at up to 9000 m elevation, but it is unclear how they sustain the high metabolic rates needed for flight in the severe hypoxia at these altitudes. To better understand the basis for this physiological feat, we compared the flight muscle phenotype of bar-headed geese with that of low altitude birds (barnacle geese, pink-footed geese, greylag geese and mallard ducks). Bar-headed goose muscle had a higher proportion of oxidative fibres. This increased muscle aerobic capacity, because the mitochondrial volume densities of each fibre type were similar between species. However, bar-headed geese had more capillaries per muscle fibre than expected from this increase in aerobic capacity, as well as higher capillary densities and more homogeneous capillary spacing. Their mitochondria were also redistributed towards the subsarcolemma (cell membrane) and adjacent to capillaries. These alterations should improve O(2) diffusion capacity from the blood and reduce intracellular O(2) diffusion distances, respectively. The unique differences in bar-headed geese were much greater than the minor variation between low altitude species and existed without prior exercise or hypoxia exposure, and the correlation of these traits to flight altitude was independent of phylogeny. In contrast, isolated mitochondria had similar respiratory capacities, O(2) kinetics and phosphorylation efficiencies across species. Bar-headed geese have therefore evolved for exercise in hypoxia by enhancing the O(2) supply to flight muscle.

Indexed as

AltitudeBiological EvolutionAdaptation, PhysiologicalAnimalsFlight, AnimalGeeseMitochondria, MuscleMuscle, SkeletalOxygen ConsumptionSpecies Specificity

Identifiers

PMID19640884
PMCPMC2817306

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.