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Fig. 5. Comparison of timing (A) and magnitude (B) of the observed and calculated
forces exerted by bluegill on tethered prey. Time 0 (in B) is the first frame
digitized in the image sequence (
10 frames prior to the onset of gape,
arbitrarily selected for each sequence). The timing differences between the
observed and calculated peak force were not significantly different than 0
(average 2.2±0.83 ms; RM-ANOVA F1,3=3.76,
P>0.15) and were linearly correlated (average
R2=0.78±0.06; average slope=0.89±0.09;
N=4 fish). Similarly, the peak calculated force was not significantly
different than the observed one (average deviation=–0.012±0.135
N; RM-ANOVA F1,3=0.45, P>0.54) and the two
magnitudes were correlated (average R2=0.59±0.07;
average slope=0.78±0.1; N=4 fish). Different symbols represent
data for the four fish studied, diagonal line represents the case of
X=Y.
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