Figure 5.

Representative particle emission rate dynamics (a) after a guinea pig stops moving in a cage with CC bedding, and (b) after placing the aluminum sleeve containing an anesthetized guinea pig inside the measurement cage. In (a), the blue lines are the animal velocity. In both (a) and (b), the red lines are best fits to an exponential decay of the form $N=N_0{e}^{-kt}$ with k = 0.85 min⁻¹ for (a) and 0.22 min⁻¹ for (b).