Swimming kinematics and efficiency of entangled North Atlantic right whales
Marine mammals are streamlined for efficient movement in their relatively viscous fluid environment and are able to alter their kinematics (i.e. fluke stroke frequency, amplitude, or both) in response to changes in force balance. Entanglement in fishing gear adds significant drag and buoyant forces...
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ftmit:oai:dspace.mit.edu:1721.1/120036 2023-06-11T04:11:30+02:00 Swimming kinematics and efficiency of entangled North Atlantic right whales van der Hoop, JM Nowacek, DP Moore, MJ Triantafyllou, Michael S Massachusetts Institute of Technology. Department of Mechanical Engineering Triantafyllou, Michael S 2019-01-08T13:46:15Z application/pdf http://hdl.handle.net/1721.1/120036 unknown Inter-Research Science Center http://dx.doi.org/10.3354/ESR00781 Endangered Species Research 1863-5407 1613-4796 http://hdl.handle.net/1721.1/120036 Van der Hoop, J. M. et al. “Swimming Kinematics and Efficiency of Entangled North Atlantic Right Whales.” Endangered Species Research 32 (January 2017): 1–17 © 2017 The Author(s) orcid:0000-0002-4960-7060 Creative Commons Attribution 4.0 International license https://creativecommons.org/licenses/by/4.0/ Endangered Species Research Article http://purl.org/eprint/type/JournalArticle 2019 ftmit https://doi.org/10.3354/ESR00781 2023-05-29T08:21:06Z Marine mammals are streamlined for efficient movement in their relatively viscous fluid environment and are able to alter their kinematics (i.e. fluke stroke frequency, amplitude, or both) in response to changes in force balance. Entanglement in fishing gear adds significant drag and buoyant forces that can impact swimming behaviors across a range of timescales. We deployed biologging tags during the disentanglement of 2 North Atlantic right whales Eubalaena glacialis to (1) examine how their kinematics changed in response to drag and buoyancy from entanglement in fishing gear, and (2) calculate resultant changes in swimming efficiency for one individual. We observed variable responses in dive behavior, but neither whale appeared to exploit added buoyancy to reduce energy expenditure. While some of the observed changes in behavior were individually specific, some swimming kinematics were consistently modulated in response to high drag and buoyancy associated with entangling gear, affecting thrust production. In high drag and buoyancy conditions, fluke strokes were significantly shorter and more variable in shape, and gliding was less frequent. Thrust and efficiency significantly differed among dive phases. Disentanglement reduced thrust coefficients ~4-fold, leading to 1.2 to 1.8-fold lower power (W). Ideal propulsive efficiency was significantly lower when entangled, though we detected no difference in observed propulsive efficiency between the conditions. Similar to carrying heavy objects or changing shoes, we present another condition where animals perceive unique movement constraints over seconds to minutes and develop compensatory strategies, altering their movement accordingly. Article in Journal/Newspaper Eubalaena glacialis North Atlantic DSpace@MIT (Massachusetts Institute of Technology) Endangered Species Research 32 1 17 |
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Open Polar |
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DSpace@MIT (Massachusetts Institute of Technology) |
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ftmit |
language |
unknown |
description |
Marine mammals are streamlined for efficient movement in their relatively viscous fluid environment and are able to alter their kinematics (i.e. fluke stroke frequency, amplitude, or both) in response to changes in force balance. Entanglement in fishing gear adds significant drag and buoyant forces that can impact swimming behaviors across a range of timescales. We deployed biologging tags during the disentanglement of 2 North Atlantic right whales Eubalaena glacialis to (1) examine how their kinematics changed in response to drag and buoyancy from entanglement in fishing gear, and (2) calculate resultant changes in swimming efficiency for one individual. We observed variable responses in dive behavior, but neither whale appeared to exploit added buoyancy to reduce energy expenditure. While some of the observed changes in behavior were individually specific, some swimming kinematics were consistently modulated in response to high drag and buoyancy associated with entangling gear, affecting thrust production. In high drag and buoyancy conditions, fluke strokes were significantly shorter and more variable in shape, and gliding was less frequent. Thrust and efficiency significantly differed among dive phases. Disentanglement reduced thrust coefficients ~4-fold, leading to 1.2 to 1.8-fold lower power (W). Ideal propulsive efficiency was significantly lower when entangled, though we detected no difference in observed propulsive efficiency between the conditions. Similar to carrying heavy objects or changing shoes, we present another condition where animals perceive unique movement constraints over seconds to minutes and develop compensatory strategies, altering their movement accordingly. |
author2 |
Massachusetts Institute of Technology. Department of Mechanical Engineering Triantafyllou, Michael S |
format |
Article in Journal/Newspaper |
author |
van der Hoop, JM Nowacek, DP Moore, MJ Triantafyllou, Michael S |
spellingShingle |
van der Hoop, JM Nowacek, DP Moore, MJ Triantafyllou, Michael S Swimming kinematics and efficiency of entangled North Atlantic right whales |
author_facet |
van der Hoop, JM Nowacek, DP Moore, MJ Triantafyllou, Michael S |
author_sort |
van der Hoop, JM |
title |
Swimming kinematics and efficiency of entangled North Atlantic right whales |
title_short |
Swimming kinematics and efficiency of entangled North Atlantic right whales |
title_full |
Swimming kinematics and efficiency of entangled North Atlantic right whales |
title_fullStr |
Swimming kinematics and efficiency of entangled North Atlantic right whales |
title_full_unstemmed |
Swimming kinematics and efficiency of entangled North Atlantic right whales |
title_sort |
swimming kinematics and efficiency of entangled north atlantic right whales |
publisher |
Inter-Research Science Center |
publishDate |
2019 |
url |
http://hdl.handle.net/1721.1/120036 |
genre |
Eubalaena glacialis North Atlantic |
genre_facet |
Eubalaena glacialis North Atlantic |
op_source |
Endangered Species Research |
op_relation |
http://dx.doi.org/10.3354/ESR00781 Endangered Species Research 1863-5407 1613-4796 http://hdl.handle.net/1721.1/120036 Van der Hoop, J. M. et al. “Swimming Kinematics and Efficiency of Entangled North Atlantic Right Whales.” Endangered Species Research 32 (January 2017): 1–17 © 2017 The Author(s) orcid:0000-0002-4960-7060 |
op_rights |
Creative Commons Attribution 4.0 International license https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3354/ESR00781 |
container_title |
Endangered Species Research |
container_volume |
32 |
container_start_page |
1 |
op_container_end_page |
17 |
_version_ |
1768386623828918272 |