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Fig. 3. Mean profiles of scaled speed along the centerline transect for bluegill
sunfish (black circles) and largemouth bass (red triangles). The lines
correspond to the polynomial fit to each pooled dataset. For each feeding in
these pooled datasets, the profile at the time of peak fluid speed was scaled
by dividing spatial distances by gape at this time and the magnitude of speed
by the measured speed located at a distance of 
gape in front of the
fish. The speed at this location is used throughout as a reference, because at
this location fluid speed is substantial and the PIV measurements
meet the validation criteria (see Materials and methods). The error bars
represent the s.d. of the residuals about the fit lines. Fluid speed at the
mouth aperture is approximately 3.5 times (bluegill) and 4.5 times (bass) that
at gape. The data for bluegill are from Day et al.
(Day et al., 2005).
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