Table 6. Elephant design- and model-based abundance estimates (N and N′, respectively) with 95% confidence intervals (95% CI and 95% CI′) and percent coefficient of variation (%CV and %CV′) for each survey stratum and for the landscape.
| Survey stratum | N [95% CI] | %CV | N′ [95% CI′] | %CV′1 |
| NNNP | 2,175 [1,595–2,966] | 15.2 | 2,131 [447–3,309] | 50.9 |
| Kabo FMU | 1,774 [1,160–2,713] | 20.4 | 1,606 [217–2,869] | 65.7 |
| Pokola FMU | 3,130 [1,817–5,392] | 26.7 | 3,157 [508–5,590] | 74.3 |
| Loundougou FMU | 1,406 [679–2,914] | 35.8 | 1,230 [416–4,179] | 66.5 |
| Mokabi | 59 [19–185] | 57.5 | 95 [199–3,058] | 70.0 |
| Bailly | 2,495 [1,059–5,880] | 43.4 | 2,194 [672–4,891] | 49.1 |
| LTCR | 37 [13–109]2 | 59.82 | 39 [752–2,763] | 43.9 |
| Ndoki-Likouala Landscape | 11,076 [8,223–14,920] | 15.0 | 10,452 [7,813–17,126] | 22.5 |
1
The model-based coefficient of variation %CV′ is directly comparable to the design-based %CV, as aside from the variation from encounter rate it also includes the variation from the detection function, dung production and dung decay. The model-based 95% CI′ only include variation due to variation in encounter rate.
2
See Table 3 for methods used to estimate abundance, density and confidence intervals for the whole LTCR.