. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 0 10 20 30 40 50 60 70 80 90 100 Pulse Slope (uM/s) B 25 cm 50 cm 100 cm 10 15 20 25 30 35 40 45. Pulse Height (uM) Figure 6. Probability distributions of pulse slope (A) and pulse height (B) at three sites on x-axis: x = 25 (Solid), x = 50 (Dashed), and x = 100 (Dotted). Based on 3-mm records. with values tapering off considerably to the sides. The (x = 25, y = 0) values were significantly different from the other means (P < .01). This tapering is asymmetrical: the differences in the left (y = -5, -10) and right (y
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 0 10 20 30 40 50 60 70 80 90 100 Pulse Slope (uM/s) B 25 cm 50 cm 100 cm 10 15 20 25 30 35 40 45. Pulse Height (uM) Figure 6. Probability distributions of pulse slope (A) and pulse height (B) at three sites on x-axis: x = 25 (Solid), x = 50 (Dashed), and x = 100 (Dotted). Based on 3-mm records. with values tapering off considerably to the sides. The (x = 25, y = 0) values were significantly different from the other means (P < .01). This tapering is asymmetrical: the differences in the left (y = -5, -10) and right (y = +5. + 10) values within a z-plane are indicative of lateral meandering of the entire plume. The higher (z = +6) sampling sites had larger peak values (Fig. 4a) but slower- rising (Fig. 4b) odor pulses. The lower (z = -6) sampling sites had low intensity (Fig. 4a), but faster-rising (Fig. 4b) odor pulses; this will be discussed later. At the x = 50 and x = 100 cm sampling sites, the distributions of mean val- ues were also centered around the cross-sectional middle of the plume with values tapering off (asymmetrically as above) away from the center. At all sites, the standard deviation of both pulse height and slope were approxi- mately equal to the mean value at all sites. This is likely due to the chaotic nature of the turbulent odor plume and indicates that the mean value of any parameter is a poor indicator of the instantaneous value of that param- eter. Spectral analysis of the odor profiles (Fig. 5; note change in y-axis scale) from the three x-axis (z = y = 0) sampling sites shows the change in the temporal characteristics of odor signals with distance down-current (Fig. 4). Most pulses had slope values that translated into low frequency (<4 Hz) signals with the majority of the odor signal below 1 Hz at all sites. There is also a reduction in the total number and amplitude of odor bursts with distance, which is reflected in the decrease of the overall energy at the f
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
