. 2023 May 29;101:skad176. doi: 10.1093/jas/skad176

Table 4.

Means (line 1), standard deviations (line 2), and phenotypic variances (line 3) for each shortened increment between 30 and 40 visits and the full 100 visits for CH₄, CO₂, O₂, and metabolic heat production (kcal/d)

Gas	Direction	30 visits	32 visits	34 visits	36 visits	38 visits	40 visits
CH₄, g/d	Forward	358.07^a 48.69 2,232.0	359.05^a 49.48 2,304.4	358.98^a 50.06 2,359.0	358.49^a 49.94 2,347.2	357.91^a 48.95 2,255.8	358.33^a 49.48 2,304.9
CH₄, g/d	Reverse	345.07^a 48.75 2,237.1	343.93^a 48.89 2,249.6	344.62^a 49.14 2,273.0	344.83^a 48.84 2,245.0	344.79^a 49.13 2,272.0	345.35^a 49.31 2,288.5
CO₂, g/d	Forward	10,634.1^a 1,221.3 1,403,901	10,653.5^a 1,225.3 1,413,144	10,640.0^a 1,225.7 1,414,053	10,629.1^a 1,234.1 1,433,540	10,619.1^a 1,242.6 1,453,437	10,623.6^a 1,256.3 1,485,665
CO₂, g/d	Reverse	10,126.6^a 1,076.1 1,090,063	10,134.4^a 1,077.7 1,093,258	10,113.9^a 1,068.6 1,074,826	10,114.9^a 1,069.9 1,077,369	10,122.4^a 1,079.5 1,096,802	10,130^a 1,080.6 1,099,193
O₂, g/d	Forward	7,845.9^a 951.8 852,799	7,861.8^a 952.8 854,560	7,852.3^a 962.7 872,383	7,854.9^a 971.3 888,021	7,852.3^a 984.5 912,264	7858.2^a 996.7 934,983
O₂, g/d	Reverse	7,481.1^a 854.1 686,723	7,490.4^a 846.3 674,207	7,470.8^a 835.7 657,453	7,471.6^a 835.6 657,262	7,477.4^a 840.4 664,828	7484.8^a 843.9 670,339
Metabolic heat production, kcal/d	Forward	27,838.6^a 10,382,150	27,893.4^a 10,411,648	27,858.9^a 10,577,131	27,859.3^a 10,763,610	27,846.4^a 11,033,407	27,864.9^a 11,299,402
Metabolic heat production, kcal/d	Reverse	26,532.3^a 8,254,679	26,563.5^a 8,141,997	26,496.7^a 7,952,487	26,499.2^a 7,953,584	26,526.7^a 8,057,674	26,544.2^a 8,107,512

^aIndicates no significant differences between forward or reverse interval means (P < 0.05).