Table 4. Great ape nest density (Nests/km²) and individual density (Inds/km²), 95% confidence intervals (95% CI) and percent coefficient of variation (%CV) for each survey stratum and for the landscape.

Survey stratum	L (km)	Ape sp.	No. nests	Nests/km2 [95% CI]	Inds/km2 [95% CI]	%CV1
NNNP	40.0	Apes	283	265.7 [174.0–405.7]	2.90 [1.90–4.44]	20.6
		Gorilla	81	93.2 [53.9–161.3]	1.02 [0.59–1.77]	26.8
		Chimp	202	102.3 [61.7–169.8]	1.03 [0.61–1.71]	25.1
Kabo FMU	30.0	Apes	175	232.2 [134.3–401.5]	2.54 [1.47–4.39]	26.2
		Gorilla	119	197.6 [93.5–417.4]	2.16 [1.02–4.56]	36.1
		Chimp	56	39.3 [23.7–65.2]	0.39 [0.24–0.66]	24.5
Pokola FMU	41.0	Apes	371	361.1 [214.9–606.7]	3.95 [2.35–6.64]	25.5
		Gorilla	305	373.6 [207.4–672.8]	4.08 [2.27–7.36]	28.9
		Chimp	66	34.0 [14.2–81.5]	0.34 [0.14–0.82]	44.2
Loundougou FMU	35.7	Apes	131	147.1 [89.2–242.4]	1.61 [0.97–2.65]	24.3
		Gorilla	51	71.2 [31.3–161.9]	0.78 [0.34–1.77]	40.7
		Chimp	80	47.8 [25.6–89.4]	0.48 [0.25–0.90]	30.9
Mokabi	29.0	Apes	15	20.8 [8.0–54.2]	0.23 [0.09–0.59]	47.0
		Gorilla	8	14.1 [4.8–41.3]	0.15 [0.05–0.45]	53.5
		Chimp	7	5.2 [2.1–13.0]	0.05 [0.02–0.13]	45.5
Bailly	48.0	Apes	157	131.7 [80.7–214.8]	1.44 [0.88–2.35]	24.2
		Gorilla	75	78.8 [39.0–159.2]	0.86 [0.43–1.74]	35.1
		Chimp	82	36.6 [19.6–68.3]	0.37 [0.2–0.69]	31.2
LTCR2	106.0	Apes	521	190.0 [126.5–285.3]	2.08 [1.38–3.12]	21.0
		Gorilla	451	207.8 [152.1–283.9]	2.27 [1.66–3.11]	16.1
		Chimp	70	12.95 [6.6 –25.5]	0.13 [0.07–0.26]	35.9
Ndoki-Likouala Landscape	329.7	Apes	1,653	197.9 [158.7–246.8]	2.16 [1.73–2.70]	11.3
		Gorilla	1,090	151.3 [113.5–201.9]	1.65 [1.24–2.21]	14.5
		Chimp	563	41.2 [31.4–54.0]	0.41 [0.31–0.55]	14.6

Also shown is the total survey effort (L), the ape species (Ape sp.) and the total number of nests counted before truncation (No. nests).

¹% CV calculated for individual density incorporates variance of dung decay and defecation rates.

²See Table 3 for methods used to estimate abundance, density and confidence intervals for the whole LTCR.