Table 3. Data on average CH₄ production of camelids and ruminants obtained by respiration measurements sorted by animal size.

Group		Mean BM (SD); n	Mean CH4 production (SD); n
		kg	L d−1 kg BM−1	L kg DMI−1	% DEI	L kg dNDFI−1
All	Camelids	259 (±260); 18	0.32 (±0.11); 18	20.1 (±4.4); 18	8.0 (±2.3); 17	92.7 (±33.9); 17
	Ruminants	161 (±211); 48	0.58 (±0.16); 48	28.1 (±6.0); 34	11.7 (±2.8); 23	86.2 (±12.1); 10
Small	South American camelids	106 (±46); 13	0.35 (±0.10); 13	21.2 (±4.6); 13	8.3 (±2.6); 12	97.4 (±39.1); 12
	Sheep and goats	53 (±22); 37	0.55 (±0.17); 37	26.4 (±5.1); 24	11.6 (±2.4); 17	86.8 (±11.5); 6
Large	Bactrian camels	658 (±72); 5	0.23 (±0.05); 5	17.4 (±2.5); 5	7.3 (±1.1); 5	81.5 (±12.7); 5
	Cattle	525 (±140); 11	0.66 (±0.10); 11	32.0 (±6.6); 10	12.0 (±4.2); 6	85.3 (±14.9); 4

Note that sample size corresponds to the number of individuals used for measurements in the present study but to means from different publications for ruminants. Data sources are Table 2 for the present study and in Table S1 for literature data. BM body mass, DMI dry matter intake, DEI digestible energy intake, dNDFI digestible neutral detergent fiber intake.