Rowing jellyfish contract to maintain neutral buoyancy
ABSTRACT: Jellyfish are easily carried by ocean currents, yet most studies on jellyfish focus on the kinematics in a quiescent fluid. In this experimental and theoretical study, we film six species of rowing jellyfish in a range of background flow speeds at the Georgia Aquarium. Each species has a u...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2018-05-01
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| Series: | Theoretical and Applied Mechanics Letters |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2095034918301028 |
| _version_ | 1811308021607825408 |
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| author | Patricia J. Yang Matthew Lemons David L. Hu |
| author_facet | Patricia J. Yang Matthew Lemons David L. Hu |
| author_sort | Patricia J. Yang |
| collection | DOAJ |
| description | ABSTRACT: Jellyfish are easily carried by ocean currents, yet most studies on jellyfish focus on the kinematics in a quiescent fluid. In this experimental and theoretical study, we film six species of rowing jellyfish in a range of background flow speeds at the Georgia Aquarium. Each species has a unique contraction frequency, which is independent of both the body orientation and the background flow speed. Our mathematical model reveals that jellyfish contract to offset their sinking. This behavior is invariant: Despite the background flow conditions, jellyfish contract as if they are oriented upright in a quiescent fluid. Our study suggests that jellyfish operate in open-loop without feedback from their environment. Keywords: Jellyfish, Thrust, Background flow |
| first_indexed | 2024-04-13T09:15:33Z |
| format | Article |
| id | doaj.art-8a1f9d137aec4775b5ec6e820e7cca83 |
| institution | Directory Open Access Journal |
| issn | 2095-0349 |
| language | English |
| last_indexed | 2024-04-13T09:15:33Z |
| publishDate | 2018-05-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Theoretical and Applied Mechanics Letters |
| spelling | doaj.art-8a1f9d137aec4775b5ec6e820e7cca832022-12-22T02:52:45ZengElsevierTheoretical and Applied Mechanics Letters2095-03492018-05-0183147152Rowing jellyfish contract to maintain neutral buoyancyPatricia J. Yang0Matthew Lemons1David L. Hu2Schools of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USASchools of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USASchools of Mechanical Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA; Schools of Biology, Georgia Institute of Technology, Atlanta, GA 30332, USA; Corresponding authorABSTRACT: Jellyfish are easily carried by ocean currents, yet most studies on jellyfish focus on the kinematics in a quiescent fluid. In this experimental and theoretical study, we film six species of rowing jellyfish in a range of background flow speeds at the Georgia Aquarium. Each species has a unique contraction frequency, which is independent of both the body orientation and the background flow speed. Our mathematical model reveals that jellyfish contract to offset their sinking. This behavior is invariant: Despite the background flow conditions, jellyfish contract as if they are oriented upright in a quiescent fluid. Our study suggests that jellyfish operate in open-loop without feedback from their environment. Keywords: Jellyfish, Thrust, Background flowhttp://www.sciencedirect.com/science/article/pii/S2095034918301028 |
| spellingShingle | Patricia J. Yang Matthew Lemons David L. Hu Rowing jellyfish contract to maintain neutral buoyancy Theoretical and Applied Mechanics Letters |
| title | Rowing jellyfish contract to maintain neutral buoyancy |
| title_full | Rowing jellyfish contract to maintain neutral buoyancy |
| title_fullStr | Rowing jellyfish contract to maintain neutral buoyancy |
| title_full_unstemmed | Rowing jellyfish contract to maintain neutral buoyancy |
| title_short | Rowing jellyfish contract to maintain neutral buoyancy |
| title_sort | rowing jellyfish contract to maintain neutral buoyancy |
| url | http://www.sciencedirect.com/science/article/pii/S2095034918301028 |
| work_keys_str_mv | AT patriciajyang rowingjellyfishcontracttomaintainneutralbuoyancy AT matthewlemons rowingjellyfishcontracttomaintainneutralbuoyancy AT davidlhu rowingjellyfishcontracttomaintainneutralbuoyancy |