Cited by 159Marine Invertebrate Physiology and EcologyBiomimetic flight and propulsion mechanismsPhysiological and biochemical adaptations

The ontogenetic scaling of hydrodynamics and swimming performance in jellyfish (Aurelia aurita)

McHenry, Matthew J., Jed, Jason·2003·Journal of Experimental Biology

Abstract

It is not well understood how ontogenetic changes in the motion and morphology of aquatic animals influence the performance of swimming. The goals of the present study were to understand how changes in size, shape and behavior affect the hydrodynamics of jet propulsion in the jellyfish Aurelia aurita and to explore how such changes affect the ontogenetic scaling of swimming speed and cost of transport. We measured the kinematics of jellyfish swimming from video recordings and simulated the hydrodynamics of swimming with two computational models that calculated thrust generation by paddle and jet mechanisms. Our results suggest that thrust is generated primarily by jetting and that there is negligible thrust generation by paddling. We examined how fluid forces scaled with body mass using the jet model. Despite an ontogenetic increase in the range of motion by the bell diameter and a decrease in the height-to-diameter ratio, we found that thrust and acceleration reaction scaled with body mass as predicted by kinematic similarity. However, jellyfish decreased their pulse frequency with growth, and speed consequently scaled at a lower exponential rate than predicted by kinematic similarity. Model simulations suggest that the allometric growth in Aurelia results in swimming that is slower, but more energetically economical, than isometric growth with a prolate bell shape. The decrease in pulse frequency over ontogeny allows large Aurelia medusae to avoid a high cost of transport but generates slower swimming than if they maintained a high pulse frequency. Our findings suggest that ontogenetic change in the height-to-diameter ratio and pulse frequency of Aurelia results in swimming that is relatively moderate in speed but is energetically economical.

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Crossref · 10.1242/jeb.00649

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Authors
McHenry, M. J., & Jed, J.
Affiliations
  • Harvard University (US)
  • University of California, Berkeley (US)
Corresponding author
  • McHenry, Matthew J.
  • Jed, Jason
Venue
Journal of Experimental Biology
Published
2003-11-15
Volume
206
Issue
22
Pages
4125-4137
ISSN
  • 0022-0949 (ISSN-L)
  • 1477-9145
OpenAlex
W2028716259
Cited by
157
References
53
Citations by year
2026: 7 · 2025: 8 · 2024: 11 · 2023: 11 · 2022: 2 · 2021: 11 · 2020: 8 · 2019: 10 · 2018: 6 · 2017: 9 · 2016: 6 · 2015: 10 · 2014: 8 · 2013: 9 · 2012: 6
FWCI
3.21
Type
journal article
Language
en
Open access
closed
Locations
  • Journal of Experimental Biology (publishedVersion)
  • PubMed (publishedVersion)
  • HighWire Press Open Archive (submittedVersion)
Topics
  • Physical Sciences › Earth and Planetary Sciences › Paleontology › Marine Invertebrate Physiology and Ecology
  • Physical Sciences › Engineering › Aerospace Engineering › Biomimetic flight and propulsion mechanisms
  • Physical Sciences › Environmental Science › Ecology › Physiological and biochemical adaptations
Keywords
Aurelia aurita, jellyfish, ontogenetic scaling, swimming hydrodynamics, jet propulsion, cost of transport, swimming speed, pulse frequency, kinematic similarity, allometric growth, thrust generation
MeSH terms
Acceleration, Animals, Biomechanical Phenomena, Body Constitution, Body Weights and Measures, Computer Simulation, Models, Theoretical, Swimming, Time Factors, Video Recording, Scyphozoa

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