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Fig. 4 Components of prey capture.
The chart in panel A shows a larva′s pursuit and capture of a paramecium (arrow, B). The individual elements of the behavior are indicated by red lines. Panels B–I show individual frames from the movie of this sequence, with approximate times of the frames indicated by arrows in Panel A. The paramecium is indicated with an arrow in panel B, and all panels show the same field of view. Panels B and C show opposite tail bends of a forward swim, with extensions of the outside pectoral fin in each case. The larva pauses in panel D. Panel E shows the unilateral tail bend typical of a J-turn, with the outside pectoral fin extended. An S-bend is seen in panel F, which leads to the capture of the paramecium in panel G. Strong abductions of both pectoral fins are seen immediately after capture (Panel H), before the larva turns and swims away (Panel I). Time stamps are shown for each panel. The scale bar in B represents 1 mm. The larva shown is 7 dpf.