Table 4. Estimates of state parameters in occupancy modeling derived from detection histories gathered in southern Illinois, Dec 2015 –Feb 2016.
Species | Method | Naïve Ψ a | Ψ(.)b | p (.)c | SE(p)d | Measurement Error (1-p) |
---|---|---|---|---|---|---|
Bobcat | One Camera | 0.15 | 1.000 | 0.030 | 0.017 | 0.970 |
Two Cameras | 0.15 | 0.277 | 0.144 | 0.125 | 0.856 | |
Four Cameras | 0.25 | 0.414 | 0.169 | 0.101 | 0.831 | |
Coyote | One Camera | 0.15 | 0.277 | 0.144 | 0.125 | 0.856 |
Two Cameras | 0.15 | 0.277 | 0.144 | 0.125 | 0.856 | |
Four Cameras | 0.25 | 0.414 | 0.169 | 0.101 | 0.831 | |
Virginia Opossum | One Camera | 0.25 | 0.294 | 0.204 | 0.118 | 0.796 |
Two Cameras | 0.30 | 0.414 | 0.169 | 0.101 | 0.831 | |
Four Cameras | 0.45 | 0.894 | 0.113 | 0.071 | 0.887 | |
White-tailed Deer | One Camera | 0.40 | 0.557 | 0.179 | 0.087 | 0.821 |
Two Cameras | 0.60 | 0.685 | 0.277 | 0.074 | 0.723 | |
Four Cameras | 0.70 | 0.718 | 0.376 | 0.069 | 0.624 |
Naïve occupancy estimates were calculated by methods presented in MacKenzie et al. (2002), and represent the proportion of total sites at which a species was detected. Occupancy and detection estimates presented are the transformed beta estimates from the null model [Ψ(.) p(.)].
aThe proportion of sites a species was actually detected
bOccupancy probability–the estimation of the proportion of sites occupied, given the detection history of a species.
cDetection probability–the probability of detecting a species, given it is present.
dStandard Error of detection probability estimates.