Table 6. For σ = 1 km, summary estimates of $\widehat{\sigma }$ in the regular trap configuration when trap spacing increased from 4.71 to 10.67 km (J = 128 to 32 traps) and N = 500.

p0 = 0.20	Mean	SD	Min	Max	RMSE	MNB
4.71	1.00	0.07	0.80	1.22	0.07	0.35
5.24	0.98	0.10	0.57	1.30	0.10	-1.77
6.40	0.98	0.17	0.49	1.39	0.17	-1.79
10.67	0.97	0.27	0.41	1.47	0.27	-2.73
p 0 = 0.10
4.71	1.00	0.13	0.57	1.41	0.13	0.12
5.24	0.96	0.19	0.50	1.76	0.20	-4.17
6.40	0.98	0.24	0.50	1.51	0.24	-1.72
10.67	0.93	0.34	0.34	1.85	0.34	-7.02
p 0 = 0.05
4.71	0.97	0.24	0.38	1.89	0.24	-3.30
5.24	0.93	0.30	0.36	2.31	0.36	-7.51
6.40	1.02	0.31	0.39	1.77	0.31	1.57
10.67	0.99	2.41	0.23	2.02	2.16	-1.50

<500 iterations were used for the italicized estimates, due to instability of MLE with sparse datasets.

See Table 5 footnote for number of iterations used for the italicized estimates.