Table 1. Summary of active burrow transects and indexed black-tailed prairie dog (BTPD) densities in 2018 (before plague epizootic) and 2020 (after epizootic) on non-treated (baseline) and 0.005% fipronil (FIP) grain treated habitat, Rocky Mountain Arsenal National Wildlife Refuge, Colorado.
| Year | Treatment | Area (ha) | No. transects | Sum transect length (m) | Range BTPD ha-1 |
|---|---|---|---|---|---|
|
2018
(before epizootic) |
Non-treated | 10 | 6 | 859 | 36.52–86.79 |
| FIP grain | 238 | 27 | 18,529 | 17.02–73.75 | |
|
2020
(after epizootic) |
Non-treated | 10* | 6 | 861 | 0–0 |
| FIP grain | 238 | 27 | 18,850** | 26.09–63.79 |
*No observable BTPD activity
**Sum transect length increased from 2018 to 2020 on habitat treated with FIP grain, reflecting an increase in BTPD habitat size on that habitat