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Auteur McHenry, M.J.; Anderson, P.S.L.; Van Wassenbergh, S.; Matthews, D.G.; Summers, A.P.; Patek, S.N. url  doi
openurl 
  Titre The comparative hydrodynamics of rapid rotation by predatory appendages Type Article scientifique
  Année (down) 2016 Publication The Journal of Experimental Biology Revue Abrégée J Exp Biol  
  Volume 219 Numéro Pt 21 Pages 3399-3411  
  Mots-Clés Drag; Feeding; Kinematics; Phylogenetic comparative methods; Scaling; Torque  
  Résumé Countless aquatic animals rotate appendages through the water, yet fluid forces are typically modeled with translational motion. To elucidate the hydrodynamics of rotation, we analyzed the raptorial appendages of mantis shrimp (Stomatopoda) using a combination of flume experiments, mathematical modeling and phylogenetic comparative analyses. We found that computationally efficient blade-element models offered an accurate first-order approximation of drag, when compared with a more elaborate computational fluid-dynamic model. Taking advantage of this efficiency, we compared the hydrodynamics of the raptorial appendage in different species, including a newly measured spearing species, Coronis scolopendra The ultrafast appendages of a smasher species (Odontodactylus scyllarus) were an order of magnitude smaller, yet experienced values of drag-induced torque similar to those of a spearing species (Lysiosquillina maculata). The dactyl, a stabbing segment that can be opened at the distal end of the appendage, generated substantial additional drag in the smasher, but not in the spearer, which uses the segment to capture evasive prey. Phylogenetic comparative analyses revealed that larger mantis shrimp species strike more slowly, regardless of whether they smash or spear their prey. In summary, drag was minimally affected by shape, whereas size, speed and dactyl orientation dominated and differentiated the hydrodynamic forces across species and sizes. This study demonstrates the utility of simple mathematical modeling for comparative analyses and illustrates the multi-faceted consequences of drag during the evolutionary diversification of rotating appendages.  
  Adresse Department of Biology, Duke University, Durham, NC 27708, USA snp2@duke.edu  
  Auteur institutionnel Thèse  
  Editeur Lieu de Publication Éditeur  
  Langue English Langue du Résumé Titre Original  
  Éditeur de collection Titre de collection Titre de collection Abrégé  
  Volume de collection Numéro de collection Edition  
  ISSN 0022-0949 ISBN Médium  
  Région Expédition Conférence  
  Notes PMID:27807217 Approuvé pas de  
  Numéro d'Appel mnhn @ svanwassenbergh @ collection 1501  
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