The weathervane strategy for odorant chemotaxis and variability of curving rates. A , B , Relationship between bearing of the odorant spots and curving rate. A , Dilution of diacetyl (10−4), B , dilution of isoamyl alcohol (10−4). C , Curving rates were plotted against NaCl gradient in normal direction for all data points. The thick line indicates the average values. D , Histogram showing distribution of curving rate for fixed NaCl gradient. Extraction of data points from C that have the given value of NaCl gradient. E , F , SD of curving rates ( E ) and coefficient of skewness ( F ) for each value of NaCl gradient. G , Simplified amphid neural circuit including neurons tested in this study. Arrows indicate chemical synapses and lines show gap junctions.
