Evidence map›Paper›PMID 31211787›Full record

ArticlePLoS biology2019

Shining new light on mammalian diving physiology using wearable near-infrared spectroscopy.

J Chris McKnight, Kimberley A Bennett, Mathijs Bronkhorst, Debbie J F Russell, Steve Balfour, Ryan Milne, Matt Bivins, Simon E W Moss, Willy Colier, Ailsa J Hall and 1 more

Open access · goldAbstract read
In one paragraph

Article in PLoS biology, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 29 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
29citing papers in PubMed, 1 pooled it
7.0field-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

29 citing papers in PubMed, 1 synthesis or guideline pooled it, 65 citations in OpenAlex.

  1. Pooled it
  2. Trial
  3. Carboxyhemoglobin and depletion of blood oxygen in sleeping elephant seals.Journal of comparative physiology. B, Biochemical, systemic, and environmental physiology · 2026
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  14. What is physiologging? Introduction to the theme issue, part 2.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2021
    Article
  15. Future trends in measuring physiology in free-living animals.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2021
    Article
  16. Introduction to the theme issue: Measuring physiology in free-living animals.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2021
    Article
  17. Diving physiology of marine mammals and birds: the development of biologging techniques.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2021
    Review
  18. Fur seals do, but sea lions don't - cross taxa insights into exhalation during ascent from dives.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2021
    Article
  19. Shining new light on sensory brain activation and physiological measurement in seals using wearable optical technology.Philosophical transactions of the Royal Society of London. Series B, Biological sciences · 2021
    Article
  20. 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

11 authors at 2 institutions in 2 countries.

J Chris McKnightSea Mammal Research Unit, Scottish Oceans Institute, University of St Andrews, St Andrews, Scotland.ORCID 0000-0002-3872-4886
Kimberley A BennettDivision of Science, School of Science Engineering and Technology, Abertay University, Dundee, Scotland.ORCID 0000-0003-2168-6112
Mathijs BronkhorstArtinis Medical Systems BV, the Netherlands.ORCID 0000-0002-0410-0303
Debbie J F RussellSea Mammal Research Unit, Scottish Oceans Institute, University of St Andrews, St Andrews, Scotland.
Steve BalfourSea Mammal Research Unit Instrumentation Group, Scottish Oceans Institute, University of St Andrews, St Andrews, Scotland.
Ryan MilneSea Mammal Research Unit, Scottish Oceans Institute, University of St Andrews, St Andrews, Scotland.
Matt BivinsSea Mammal Research Unit, Scottish Oceans Institute, University of St Andrews, St Andrews, Scotland.ORCID 0000-0002-3414-1157
Simon E W MossSea Mammal Research Unit, Scottish Oceans Institute, University of St Andrews, St Andrews, Scotland.ORCID 0000-0001-5378-7773
Willy ColierArtinis Medical Systems BV, the Netherlands.
Ailsa J HallSea Mammal Research Unit, Scottish Oceans Institute, University of St Andrews, St Andrews, Scotland.ORCID 0000-0002-7562-1771
Dave ThompsonSea Mammal Research Unit, Scottish Oceans Institute, University of St Andrews, St Andrews, Scotland.ORCID 0000-0003-1546-2876
Andrews University · USAbertay University · GB

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

Investigation of marine mammal dive-by-dive blood distribution and oxygenation has been limited by a lack of noninvasive technology for use in freely diving animals. Here, we developed a noninvasive near-infrared spectroscopy (NIRS) device to measure relative changes in blood volume and haemoglobin oxygenation continuously in the blubber and brain of voluntarily diving harbour seals. Our results show that seals routinely exhibit preparatory peripheral vasoconstriction accompanied by increased cerebral blood volume approximately 15 s before submersion. These anticipatory adjustments confirm that blood redistribution in seals is under some degree of cognitive control that precedes the mammalian dive response. Seals also routinely increase cerebral oxygenation at a consistent time during each dive, despite a lack of access to ambient air. We suggest that this frequent and reproducible reoxygenation pattern, without access to ambient air, is underpinned by previously unrecognised changes in cerebral drainage. The ability to track blood volume and oxygenation in different tissues using NIRS will facilitate a more accurate understanding of physiological plasticity in diving animals in an increasingly disturbed and exploited environment.

Indexed as

AnimalsDivingDiving ReflexMammalsOxygenOxygen ConsumptionPhocaSpectroscopy, Near-InfraredWearable Electronic DevicesOxygen

Identifiers

PMID31211787
PMCPMC6581238
OpenAlexW2951753614

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.