Evidence map›Paper›PMID 34109418›Full record

ArticleThe Journal of experimental biology2021

Scaling of oscillatory kinematics and Froude efficiency in baleen whales.

William T Gough, Hayden J Smith, Matthew S Savoca, Max F Czapanskiy, Frank E Fish, Jean Potvin, K C Bierlich, David E Cade, Jacopo Di Clemente, John Kennedy and 4 more

Open access · hybridAbstract read
In one paragraph

Article in The Journal of experimental biology, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 16 papers.

0numbers the graph read from it
0cells of the map it votes in
16citing papers in PubMed
3.0field-weighted citation impact, top 9% 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

16 citing papers in PubMed, 28 citations in OpenAlex.

  1. Article
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  4. Closing the air gap: the use of drones for studying wildlife ecophysiology.Biological reviews of the Cambridge Philosophical Society · 2025
    Review
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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

14 authors at 7 institutions in 3 countries.

William T GoughHopkins Marine Station, Stanford University, Pacific Grove, CA 93950, USA.ORCID 0000-0003-2701-5299
Hayden J SmithHopkins Marine Station, Stanford University, Pacific Grove, CA 93950, USA.
Matthew S SavocaHopkins Marine Station, Stanford University, Pacific Grove, CA 93950, USA.ORCID 0000-0002-7318-4977
Max F CzapanskiyHopkins Marine Station, Stanford University, Pacific Grove, CA 93950, USA.ORCID 0000-0002-6302-905X
Frank E FishDepartment of Biology, West Chester University, West Chester, PA 19383, USA.ORCID 0000-0001-5973-3282
Jean PotvinDepartment of Physics, Saint Louis University, Saint Louis, MO 63103, USA.
K C BierlichNicholas School of the Environment, Duke University, Durham, NC 27708, USA.ORCID 0000-0001-9724-6055
David E CadeHopkins Marine Station, Stanford University, Pacific Grove, CA 93950, USA.ORCID 0000-0003-3641-1242
Jacopo Di ClementeDepartment of Biology, University of Copenhagen, Copenhagen, Denmark.ORCID 0000-0003-0685-6750
John KennedyDepartment of Physics, Saint Louis University, Saint Louis, MO 63103, USA.
Paolo SegreHopkins Marine Station, Stanford University, Pacific Grove, CA 93950, USA.ORCID 0000-0002-2396-2670
Andrew StanworthFalklands Conservation, Stanley FIQQ 1ZZ, Falkland Islands.
Caroline WeirFalklands Conservation, Stanley FIQQ 1ZZ, Falkland Islands.ORCID 0000-0002-2052-5037
Jeremy A GoldbogenHopkins Marine Station, Stanford University, Pacific Grove, CA 93950, USA.ORCID 0000-0002-4170-7294
Pacific University · USSaint Louis University · USSouth Atlantic Environmental Research Institute · FKDuke University · USUniversity of California, Santa Cruz · USUniversity of Copenhagen · DKWest Chester University · US

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

High efficiency lunate-tail swimming with high-aspect-ratio lifting surfaces has evolved in many vertebrate lineages, from fish to cetaceans. Baleen whales (Mysticeti) are the largest swimming animals that exhibit this locomotor strategy, and present an ideal study system to examine how morphology and the kinematics of swimming scale to the largest body sizes. We used data from whale-borne inertial sensors coupled with morphometric measurements from aerial drones to calculate the hydrodynamic performance of oscillatory swimming in six baleen whale species ranging in body length from 5 to 25 m (fin whale, Balaenoptera physalus; Bryde's whale, Balaenoptera edeni; sei whale, Balaenoptera borealis; Antarctic minke whale, Balaenoptera bonaerensis; humpback whale, Megaptera novaeangliae; and blue whale, Balaenoptera musculus). We found that mass-specific thrust increased with both swimming speed and body size. Froude efficiency, defined as the ratio of useful power output to the rate of energy input ( Sloop, 1978), generally increased with swimming speed but decreased on average with increasing body size. This finding is contrary to previous results in smaller animals, where Froude efficiency increased with body size. Although our empirically parameterized estimates for swimming baleen whale drag were higher than those of a simple gliding model, oscillatory locomotion at this scale exhibits generally high Froude efficiency as in other adept swimmers. Our results quantify the fine-scale kinematics and estimate the hydrodynamics of routine and energetically expensive swimming modes at the largest scale.

Indexed as

BalaenopteraFin WhaleAnimalsAntarctic RegionsBiomechanical PhenomenaSwimmingCetaceanEfficiencyHydrodynamicsSwimmingThrust

Identifiers

PMID34109418
PMCPMC8317509
OpenAlexW3169173774

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.