. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. CHEMOSENSORY TRACKING IN PULSED PLUMES 51 -t - cc Q O. US 1s 1s High Low Treatment Figure 5. Net-to-gross displacement ratio (NGDR) statistics for all unsuccessful foragers (US) and for successful foragers in plumes with l-s and pulses, for high-flux and low-flux treatments (, plumes created with odorant solutions of 7 and g shrimp P'. respectively). The gray box encloses the 25th and 75th percentiles, error bars above and below the box enclose the 90th and 10th percentiles, circles represent
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. CHEMOSENSORY TRACKING IN PULSED PLUMES 51 -t - cc Q O. US 1s 1s High Low Treatment Figure 5. Net-to-gross displacement ratio (NGDR) statistics for all unsuccessful foragers (US) and for successful foragers in plumes with l-s and pulses, for high-flux and low-flux treatments (, plumes created with odorant solutions of 7 and g shrimp P'. respectively). The gray box encloses the 25th and 75th percentiles, error bars above and below the box enclose the 90th and 10th percentiles, circles represent points outside of the 90th and 10th percentiles, the black solid line within the box is the median, and the white dashed line is the mean. Lines above the box plots join pulse treatments not significantly different from each other at P < using Bonferroni adjusted post hoc tests, with NGDR arcsin-transformed prior to analysis. Sample sizes (numbers of paths) for these groups are given in Table 1. of particular filament features is still being debated (, Webster el ai. 2001; Webster and Weissburg, 2001). The results presented here indicate that larger-scale odor fluctuations of one to several seconds alter the behavior ot animals tracking chemical cues. Animals in plumes with short pulses (long inter-pulse intervals) showed degraded tracking performance. Similarly, field and laboratory studies of pheromone tracking in insects have indicated that larger- scale variation in plume features decreases the initiation and efficiency of search behavior (David ct ai. 1983; Baker and Haynes, 1987; Zanen ct ul., 1994). In aquatic creatures as well as in insects, it appears that understanding olfactory- mediated navigation will require us to investigate physical processes that create long-term fluctuations in odor concen- tration, in addition to examining fine-scale mixing. Behaviorally relevant signal properties of pulsed plumes Foraging crabs in pulsed plumes found the source l
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
