Rates of evaporative water loss in B. alvarengai housed at different ambient temperatures
| . | Evaporative water loss . | . | . | . | |
|---|---|---|---|---|---|
| Temperature (°C) . | (mg H2O h-1)a . | (mg H2O cm-2h-1)b . | Q10c . | r (s cm-1)d . | |
| 20 | 50.1±6.2 | 5.13±0.67 | 13.3±1.9 | ||
| 25 | 62.1±5.7 | 6.42±0.78 | 1.59±0.11 | 14.3±2.1 | |
| 30 | 79.3±2.7 | 8.55±1.63 | 1.77±0.30 | 15.0±2.2 | |
| 35 | 108.0±4.6 | 11.70±2.38 | 1.86±0.08 | 14.2±2.0 | |
| . | Evaporative water loss . | . | . | . | |
|---|---|---|---|---|---|
| Temperature (°C) . | (mg H2O h-1)a . | (mg H2O cm-2h-1)b . | Q10c . | r (s cm-1)d . | |
| 20 | 50.1±6.2 | 5.13±0.67 | 13.3±1.9 | ||
| 25 | 62.1±5.7 | 6.42±0.78 | 1.59±0.11 | 14.3±2.1 | |
| 30 | 79.3±2.7 | 8.55±1.63 | 1.77±0.30 | 15.0±2.2 | |
| 35 | 108.0±4.6 | 11.70±2.38 | 1.86±0.08 | 14.2±2.0 | |
Values are means ± s.e.m. (N=7).
All water loss rates were significantly affected by temperature.
Evaporative water loss rates were also calculated based on two-thirds (i.e. excluding ventral skin) of the estimated total skin surface area from the equation, SA=9.9Mb0.56 (where surface area SA is in cm2, and Mb is in g)(McClanahan and Baldwin,1969).
Q10 values are calculated between adjacent temperatures;temperature did not have a significant effect on Q10(P=0.53).
r represents the total resistance to water flux, calculated using the formula from Spotila et al. (Spotila et al., 1992).