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Figure 1


Fig. 1. Rates of evaporation measured in Inca doves at four ambient temperatures. During `Sealed' trials cloacae were occluded with cyanoacrylic glue; during `Unsealed' trials cloacae were not occluded. Relative humidity of the head-compartment influent was near 0% during `Dry' trials and near 100% during `Wet' trials. The differences between non-buccopharyngeal traces for `Unsealed' and `Sealed' trials indicate rates of cloacal evaporation. Those differences (and therefore the rates of cloacal evaporation) were negligible at Ta≤40°C and significant at Ta=42°C. The differences between traces for `Dry' and `Wet' trials indicate compensatory adjustment of cutaneous evaporation; the differences were non-significant at all four ambient temperatures. Values shown are means ± s.e.m. (N=7–13).





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