Table 2.
Scenario-specific outcomes (numbers of cats) from simulation modeling.
| No action | Remove-low | Remove-high | Cull-low | Cull-high | Sterilize-low | Sterilize-high | |
|---|---|---|---|---|---|---|---|
| Final population size (Mean) | 49.53 | 26.37 | 6.80 | 44.69 | 39.01 | 38.74 | 25.80 |
| SD | 3.76 | 11.38 | 3.24 | 5.31 | 8.90 | 8.37 | 7.42 |
| Cumulative number of cats removed or sterilized (Mean) | 0 | 168.02 | 127.32 | 109.90 | 142.55 | 100.03 | 103.60 |
| Cumulative preventable deaths, kittens plus adults (Mean) | 1000.89 | 614.91 | 222.50 | 858.43 | 737.98 | 290.32 | 32.13 |
| SD | 97.63 | 118.08 | 37.81 | 84.15 | 83.56 | 62.35 | 13.00 |
| Min | 731 | 323 | 144 | 640 | 549 | 154 | 7 |
| Max | 1254 | 890 | 347 | 1111 | 963 | 477 | 75 |
| Cumulative preventable deaths, kittens only (Mean) | 1000.89 | 447.07 | 95.72 | 745.97 | 598.68 | 290.32 | 32.13 |
| SD | 97.63 | 114.55 | 31.52 | 83.88 | 78.99 | 62.35 | 13.00 |
| Min | 731 | 196 | 38 | 543 | 418 | 154 | 7 |
| Max | 1254 | 760 | 204 | 980 | 809 | 477 | 75 |
| Cumulative kittens born in focal population (Mean) | 1145.86 | 596.02 | 127.81 | 931.91 | 771.29 | 336.81 | 37.80 |
| SD | 111.32 | 156.17 | 42.84 | 101.96 | 96.22 | 72.93 | 15.82 |
| Min | 860 | 254 | 49 | 688 | 522 | 172 | 11 |
| Max | 1404 | 990 | 273 | 1175 | 1006 | 544 | 86 |
| Cumulative kittens surviving to 6 months (Mean) | 144.97 | 148.95 | 32.09 | 185.94 | 172.61 | 46.49 | 5.67 |
| SD | 33.45 | 47.31 | 13.59 | 36.51 | 30.80 | 14.21 | 4.31 |
| Min | 77 | 47 | 2 | 98 | 93 | 13 | 0 |
| Max | 263 | 313 | 74 | 282 | 260 | 75 | 16 |
| Cumulative adults ever in focal population (Mean) | 241.54 | 247.97 | 134.32 | 279.84 | 269.04 | 146.51 | 107.10 |
| SD | 35.19 | 50.10 | 17.88 | 38.57 | 35.57 | 17.63 | 10.62 |
| Min | 173 | 139 | 91 | 202 | 186 | 96 | 84 |
| Max | 353 | 432 | 184 | 380 | 365 | 187 | 133 |
| Cumulative adults born in focal population (Mean) | 188.43 | 192.95 | 81.07 | 228.35 | 216.06 | 93.74 | 54.54 |
| SD | 32.37 | 45.58 | 13.28 | 35.87 | 30.73 | 13.67 | 4.09 |
| Min | 122 | 93 | 51 | 146 | 137 | 62 | 47 |
| Max | 303 | 350 | 122 | 321 | 301 | 123 | 65 |
| Cumulative adults born outside focal population (Mean) | 53.11 | 55.02 | 53.25 | 51.49 | 52.98 | 52.19 | 52.56 |
| SD | 9.50 | 11.10 | 8.72 | 10.61 | 11.11 | 11.08 | 8.52 |
| Min | 25 | 26 | 31 | 25 | 32 | 0 | 33 |
| Max | 79 | 86 | 74 | 82 | 84 | 82 | 71 |
| Living adults at 10-year mark born in focal population (Mean) | 34.88 | 18.11 | 1.05 | 33.40 | 28.77 | 16.49 | 1.73 |
| SD | 5.64 | 11.14 | 1.71 | 6.56 | 8.40 | 7.37 | 2.07 |
| Min | 21 | 0 | 0 | 11 | 0 | 3 | 0 |
| Max | 48 | 47 | 9 | 48 | 47 | 32 | 10 |
| Living adults at 10-year mark born outside focal population (Mean) | 14.52 | 8.44 | 4.42 | 10.45 | 10.01 | 22.30 | 23.86 |
| SD | 4.63 | 3.70 | 2.72 | 3.75 | 3.95 | 5.47 | 6.09 |
| Min | 5 | 1 | 0 | 4 | 0 | 12 | 13 |
| Max | 28 | 22 | 15 | 23 | 20 | 37 | 41 |
Sections labeled as “cumulative” were totaled over the 10-year simulation after averaging results across 100 randomly chosen iterations within each time step. Other sections refer to population status at the end of the 10-year simulation, with means based on averaging across all 1,000 iterations. SD, standard deviation; Min, minimum value; Max, maximum value.