Dynamics of the total number of hosts and the number of infected ones during the transient moving phase as predicted from a mathematical model, assuming parasite transmission from the environment. (a) Total number of individuals (M) and number of infected individuals (I) undergoing transient movement through time. (b) Cumulative total number of individuals (A) and number of infected individuals arriving at the destination location through time (AI). We emphasize that this figure is for illustrative purposes only, created using arbitrary parameter values that do not relate to values from any particular empirical system (d = 1, α = 0.1, Λ = 1, σ = 0.1, υ = 0.2). (Online version in colour.)