Figure 1.

Elimination of ¹³CO₂ from the body bicarbonate pool (note logarithmic scale) and rate of CO₂ production (ml min⁻¹) in Carollia sowelli in relation to time elapsed since peak enrichment ((a,b) dry; (c,d) wet + no rain; (e,f) wet + rain). Solid lines depict means and light grey areas the range of ± one standard deviation. Dashed lines indicate the fractional turnover of flying bats based on extrapolated ¹³C enrichments at the onset and end of the flight period (dark grey rectangle, flight period).