(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.

Fig. 2. Diurnal oxygen consumption rates in R. marmoratus over a 3-day
period measured every 6 h for 1 h. White and black bars above the graph
indicate periods of light and dark, respectively (Series II). Values are
expressed as means + s.e.m. (N=12). Oxygen consumption values
followed a significant rhythm (F2,9=15.5,
P=0.0012). The mesor of oxygen consumption is 14.79±6.59
µmol O2 g-1 h-1 and the acrophase is
13:48±00:34 h.