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  E-mail Message: I thought you might be interested in this item at http://www.worldcat.org/oclc/111134338 Title: Sweeping and striking: a kinematic study of the trunk during prey capture in three thamnophiine snakes. Publisher: ISBN/ISSN: 0022-0949 OCLC:111134338

  
  

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Sweeping and striking: a kinematic study of the trunk during prey capture in three thamnophiine snakes.

Author:	ME Alfaro
Edition/Format:	Article : English
Publication:	The Journal of experimental biology, 2003 Jul; 206(Pt) 14: 2381-92
Database:	From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
Summary:	The trunk plays an obvious and important role in the prey capture behavior of many species of snake, yet trunk function during predatory strikes is poorly understood. Axial kinematics of three thamnophiine snakes (Thamnophis couchii, Thamnophis elegans and Nerodia rhombifer) were studied to quantify differences between sideways-directed and forward-directed attacks and to investigate strike diversity at relatively low phylogenetic levels. Feeding strikes were filmed at 60 Hz, and 13 points along the head and body were digitized. These points were used to calculate body segment displacement, rotation and velocity during predatory strikes. Kinematic analysis revealed significant differences in the foraging modes of these aquatic-feeding species. T. couchii displayed a stereotypical pre-strike posture in which the entire body was arranged in a series of loops directed towards the prey. Forward displacement of body segments sometimes occurred over the entire body in T. couchii but was restricted to the anterior one-third of the trunk in T. elegans and N. rhombifer. T. couchii and N. rhombifer both struck rapidly compared with T. elegans, although N. rhombifer typically had a short strike distance. N. rhombifer struck significantly faster than T. elegans. Aquatic prey capture diversity appears to reflect ecological diversity in thamnophiine snakes.  Read more...
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