QUICK SEARCH:   [advanced] Author: Keyword(s):
Home     Help     Feedback     Subscriptions     Archive     Search     Table of Contents

First published online November 1, 2006
Journal of Experimental Biology 209, 4515-4523 (2006)
Published by The Company of Biologists 2006
doi: 10.1242/jeb.02511

This Article Summary Full Text Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Email this article to a friend Similar articles in this journal Similar articles in PubMed Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Articles by Vanhooydonck, B. Articles by Irschick, D. J. Search for Related Content PubMed PubMed Citation Articles by Vanhooydonck, B. Articles by Irschick, D. J.

Out on a limb: the differential effect of substrate diameter on acceleration capacity in Anolis lizards

Bieke Vanhooydonck^,*, Anthony Herrel and Duncan J. Irschick

Department of Ecology and Evolutionary Biology, 310 Dinwiddie Hall, Tulane University, New Orleans, LA 70118, USA

View larger version (5K): [in a new window]   Fig. 1. Acceleration profile of an Anolis carolinensis individual running on the narrow dowel. Five acceleration peaks are present. Amplitude of peak 1=24.15 m s-2, amplitude of peak 2=16.53 m s-2, amplitude of peak 3=12.88 m s-2, amplitude of peak 4=3.51 m s-2, and amplitude of peak 5=8.13 m s-2. The part of the run that contains the highest speed over an interval of 0.20 m is indicated (vmax).

View larger version (8K): [in a new window]   Fig. 2. Plot of maximal performance of A. sagrei, A. carolinensis and A. valencienni on the broad and narrow dowel. Data are the means per species ± s.e.m. (bars). (A) Maximal acceleration capacity and (B) maximal sprint speed. Symbols: squares, A. sagrei; circles, A. carolinensis; triangles, A. valencienni. Solid symbols, on broad dowel; open symbols, on narrow dowel. Points are offset for each dowel diameter so that standard error bars do not overlap.

View larger version (11K): [in a new window]   Fig. 3. Proportion of observations of reaching maximal acceleration capacity at the first peak and at subsequent peaks in A. sagrei, A. carolinensis and A. valencienni on broad and narrow dowel. (A) A. sagrei, (B) A. carolinensis and (C) A. valencienni. Black bars, maximal acceleration at the first peak; grey bars, maximal acceleration at a subsequent peak. The actual number of observations per group is indicated in brackets.

View larger version (5K): [in a new window]   Fig. 4. Plot of amplitude of acceleration peaks 1 and 2 for maximal sprint sequences of A. sagrei, A. carolinensis and A. valencienni on the broad and narrow dowel. Data are the means ± standard errors (bars) per species, dowel and peak. Symbols: squares, A. sagrei; circles, A. carolinensis; triangles, A. valencienni. Solid symbols, on broad dowel; open symbols, on narrow dowel. Full lines connect species means on the broad dowel; dashed lines connect species means on the narrow dowel. Points are offset for peak 1 and peak 2 so that standard error bars do not overlap.

View larger version (12K): [in a new window]   Fig. 5. Proportion of observations of reaching maximal sprint speed after first and after second acceleration peak in A. sagrei, A. carolinensis and A. valencienni on broad and narrow dowel. (A) A. sagrei, (B) A. carolinensis and (C) A. valencienni. Black bars, maximal acceleration after the first peak; grey bars, maximal acceleration after a subsequent peak. Only those sequences in which maximal sprint speed was attained after the first or second acceleration peak were used in the analyses. The actual number of observations per group is indicated in brackets.