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Fig. 1 Method of kinematic analysis.
Panel A shows a single frame from a high-speed movie of a 14 dpf larva that is pursuing a prey item, in this case a paramecium. In panel B, ten landmarks have been manually placed on the larva and prey. Panel C shows the resulting point-and-line representation of the larva and prey, with numbers automatically assigned to each point. The XY coordinates of each point are shown in panel D, along with automatically extracted information on the larva′s fins, tail, and position relative to the paramecium. Panel E shows a portion of the overall pursuit and capture event, indicating the tail bend, extension of each fin, and distance and bearing to the paramecium through time. The arrow indicates the frame represented in panels A–D. Scale bar in A represents 1 mm.