Fig 1.
A. Number of wild pigs culled (size of the circles) during each day of population management (X-axis) according to 5 culling patterns (labeled 1 to 5 on Y-axis). The largest circle corresponds to 171 wild pigs, the smallest corresponds to 1. Grey plus signs along the bottom indicate the timing of contraceptive control (hypothetical), if applicable. B. The maximum number of weeks with no culling during the year. C. Total culled per year. Total pigs culled by each method was 680. Line colors in B and C correspond to culling pattern labels in A.
Table 1.
Description of parameters.
Fig 2.
Effects of 5 culling patterns under different model structures.
X-axis: weekly abundance over 10 years. Five different culling patterns are distinguished using the same color scheme as in Fig 1. Black lines indicate conditions with no culling. Top plots are for populations with no immigration; bottom plots are for populations with immigration. For the individual-based model, each line is the mean replicate simulations for runs that led to eradication within 10 years. The probability of eradication shows the proportion of 30 simulations that led to eradication. The mean behavior of runs that did not lead to eradication within 10 years is shown in Fig D in S1 File.
Fig 3.
Relationship of population reduction metrics and culling conditions without (A,C,E) and with (B,D,F) immigration from surrounding areas.
Points in A-D show all the data for the indicated culling intensity and gap period; points in E and F show all the data for all culling intensity and gap periods from similar conditions. Lines are predictions using the models presented in Tables A and B in S2 File. Colors indicate data from different intrinsic population growth rate parameters: Red: r = 0.26, Blue: r = 0.58, Black: r = 0.89. The A,B and C,D give predictions for two different gap lengths: 8.6 days (dotted), 25 days (solid). Predictions are cut-off to avoid predicting outside the range of the data.
Fig 4.
Effects of adding fertility control.
Percent reduction in abundance due to sterilant (i.e., relative to culling only) after 4 years as a function of different net population growth rates (note: negative r values due to culling). Each point represents one simulation. Lines are predictions from the model presented in Table C in S2 File. Predictions were truncated outside the range of the data. Colors indicate data from different intrinsic population growth rate parameters: Red: r = 0.26, Blue: r = 0.58, Black: r = 0.89. A, C, E and G columns are for populations closed to immigration, B, D, F and H columns indicate scenarios where immigration from neighboring populations occurs. Predictions are cut-off to avoid predicting outside the range of the data.