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Figure 1


Fig. 1. Urea tissue levels in whole body R. marmoratus measured every 3 h over a 1.5-day period (Series I). White and black bars above the graph indicate periods of light and dark, respectively. Values are expressed as means + s.e.m. (N=6). Columns labeled with different letters are significantly different (P<0.05). The broken line represents the Jurea pattern under corresponding 12 h:12 h L:D conditions (Rodela and Wright, 2006). The mesor of Jurea is 0.175±0.016 µmol N g-1 h-1 and the acrophase occurs at 14:30±00:39 h.





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