(Downloading may take up to 30 seconds.
If the slide opens in your browser, select File -> Save As to save it.)
Click on image to view larger version.


Figure 6


Fig. 6. Changes in the duration of upstroke (open circles) and that of downstroke (closed circles), and the frequency of wing strokes (open squares) and that of peaks of surge acceleration (closed squares) during descent to 20 m depths. See legend of Fig. 5 for abbreviations of species names and further explanation. Statistical testing was done using all wing strokes.