Table 3. Summary estimates of when true population size N = 500 and J = 128 traps, under each of the three trap arrangements: regular, clustered, and sequential, where mean, standard deviation (SD), range, root mean squared error (RMSE), and mean normalized bias (MNB) are given for each scenario (p x σ x configuration).
| σ = 1 km | σ = 5 km | σ = 10 km | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| p0 = 0.20 | Mean | SD | Min | Max | RMSE | MNB | Mean | SD | Min | Max | RMSE | MNB | Mean | SD | Min | Max | RMSE | MNB |
| Regular | 509.0 | 75.1 | 323.7 | 843.7 | 75.57 | 1.8 | 499.9 | 6.4 | 482.0 | 518.3 | 6.38 | 0.00 | 499.9 | 0.3 | 498.0 | 500.0 | 0.31 | 0.00 |
| Clustered | 503.4 | 60.8 | 344.8 | 683.6 | 60.80 | 0.7 | 499.3 | 5.9 | 480.0 | 516.1 | 5.93 | -0.10 | 500.0 | 0.2 | 499.0 | 500.0 | 0.20 | 0.00 |
| Sequential | 508.4 | 65.7 | 328.0 | 769.6 | 66.20 | 1.7 | 499.8 | 5.6 | 479.2 | 514.1 | 5.58 | 0.00 | 499.9 | 0.2 | 499.0 | 500.0 | 0.24 | 0.00 |
| p 0 = 0.10 | ||||||||||||||||||
| Regular | 546.7 | 177.9 | 240.4 | 1696.0 | 183.78 | 9.3 | 499.7 | 9.4 | 471.5 | 525.5 | 9.41 | -0.10 | 499.6 | 1.1 | 495.8 | 501.1 | 1.14 | -0.10 |
| Clustered | 513.1 | 112.9 | 293.3 | 1168.3 | 113.58 | 2.6 | 499.7 | 8.5 | 471.3 | 523.3 | 8.53 | -0.10 | 499.5 | 1.0 | 495.3 | 500.7 | 1.13 | -0.10 |
| Sequential | 541.6 | 143.2 | 236.0 | 1164.9 | 148.94 | 8.3 | 499.7 | 8.8 | 472.3 | 524.9 | 8.81 | -0.10 | 499.4 | 1.0 | 496.2 | 500.6 | 1.14 | -0.10 |
| p 0 = 0.05 | ||||||||||||||||||
| Regular | 684.0 | 473.0 | 168.5 | 3735.5 | 507.1 | 36.8 | 499.2 | 14.1 | 454.3 | 538.3 | 14.08 | -0.20 | 499.6 | 3.0 | 491.3 | 507.2 | 3.04 | -0.10 |
| Clustered | 572.2 | 354.1 | 156.1 | 4561.6 | 361.1 | 14.4 | 499.9 | 13.8 | 447.1 | 541.0 | 13.81 | 0.00 | 499.7 | 2.9 | 490.0 | 505.9 | 2.94 | -0.10 |
| Sequential | 665.5 | 443.1 | 126.4 | 3649.3 | 472.6 | 33.1 | 500.6 | 14.0 | 449.0 | 537.9 | 13.97 | 0.10 | 499.3 | 3.0 | 482.3 | 506.3 | 3.12 | -0.10 |
<500 iterations were used for the italicized estimates, due to the instability of MLE with sparse datasets. At p0 = 0.05 and σ = 1 km, 496, 498, and 493 iterations were used for the Regular, Clustered, and Sequential configurations, respectively. (4, 2, and 7 iterations were discarded).