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Figure 2 | Parasites & Vectors

Figure 2

From: History and complexity in tick-host dynamics: discrepancies between ‘real’ and ‘visible’ tick populations

Figure 2

Outputs from simulations of the tick population model under four scenarios of large host contact rate change (see text for details). Legend: Simulations were run for either 80 (Scenarios 1 and 2) or 50 (Scenarios 3 and 4) years. The top row shows the rate and extent of change of host contact rate in each scenario. The second row shows annual AUTG values (see text) for questing nymphs (black lines) and egg-laying adult females (multiplied by 50 for aid of visual interpretation; grey lines). The third row shows the ratio of laying adult to questing nymph AUTG. In the first three rows, the periods of host increase, stability, decrease and stability are delineated with vertical dashed lines, and marked a, b, c and d, respectively, for clarity. The fourth row shows scatterplots of questing nymph AUTG against the large host contact rate index (points from phases of the simulation when the host index was increasing, or stable following an increase, are shown as closed circles; points from phases of decrease, or post-decrease stability, are shown as open circles).

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