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dc.contributor.authorvan der Hoop, Julie  Concept link
dc.contributor.authorNowacek, Douglas P.  Concept link
dc.contributor.authorMoore, Michael J.  Concept link
dc.contributor.authorTriantafyllou, Michael S.  Concept link
dc.identifier.citationEndangered Species Research 32 (2017): 1-17en_US
dc.description© The Author(s), 2017. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Endangered Species Research 32 (2017): 1-17, doi:10.3354/esr00781.en_US
dc.description.abstractMarine 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.en_US
dc.description.sponsorshipJ.M.v.d.H was supported by a postgraduate scholarship from the Natural Sciences and Engineering Research Council of Canada, the MIT Martin Family for Sustainability Fellowship, the Herrington Fitch Family Foundation, a NOAA Award #NA14OAR4320158 to The Cooperative Institute for the North Atlantic Region, and a WHOI-Duke Fellowship through the WHOI Marine Mammal Center.en_US
dc.rightsAttribution 4.0 International*
dc.subjectGait changeen_US
dc.titleSwimming kinematics and efficiency of entangled North Atlantic right whalesen_US

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Except where otherwise noted, this item's license is described as Attribution 4.0 International