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First published online June 13, 2008
Journal of Experimental Biology 211, 2071-2078 (2008)
Published by The Company of Biologists 2008
doi: 10.1242/jeb.018390

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Modulation, individual variation and the role of lingual sensory afferents in the control of prey transport in the lizard Pogona vitticeps

Vicky Schaerlaeken^1,*, Anthony Herrel^1,2 and J. J. Meyers³

¹ Department of Biology, University of Antwerp, Universiteitsplein 1, B-2610 Antwerpen, Belgium
² Department of Organismic and Evolutionary Biology, Harvard University, Cambridge, MA 02138, USA
³ Department of Biology and Organismic Evolutionary Biology Program, 221 Morrill Science Center, University of Massachusetts at Amherst, Amherst, MA 01003, USA

View larger version (8K): [in this window] [in a new window]   Fig. 1. Representative smoothed gape profile illustrating the effects of food type on prey transport kinematics in P. vitticeps. Significant differences in maximal gape distances between transport of ants (solid circles), crickets (open circles), isopods (solid triangles) and endive (open triangles) are apparent. Also note significant differences in the total duration of a transport cycle between ants and the other food items.

View larger version (12K): [in this window] [in a new window]   Fig. 2. Individual, and individual by food type interaction effects. (A) Smoothed gape profiles of the four different individuals transporting a cricket. Note how individuals 6 (solid circles) and 7 (open circles) have higher gape distances during transport than individuals 9 (solid triangles) and 10 (open triangles) and how the total transport cycle duration of individual 7 is significant longer than that of the other individuals. (B) Smoothed gape profiles of the same individuals transporting an ant. Note how individual 9 (solid triangles) has a smaller gape distance during transport than the other individuals.

View larger version (10K): [in this window] [in a new window]   Fig. 3. Results of a factor analysis performed on the kinematic data set before (solid circles) and after (open circles) transection. The first factor, along which the transection effect is most prominent, is mostly affected by duration of slow closing phase (dSC) and total transport cycle duration.

View larger version (5K): [in this window] [in a new window]   Fig. 4. Representative smoothed gape profiles illustrating the effects of elimination of lingual trigeminal feedback on prey transport kinematics in P. vitticeps. Note the differences in gape distance and cycle duration during the transport of ants before (solid circles) and after (open circles) transection.

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