Section 20: Methane measuring methods - Revision history

Cvangemert: changed name to sniffers

2026-03-16T08:47:05Z

changed name to sniffers

← Older revision		Revision as of 08:47, 16 March 2026
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	\|Medium		\|Medium
	\|-		\|-
	\|~~Breath sampling during milking and feeding~~		\|Sniffers
	\|Low		\|Low
	\|Low		\|Low
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	\|Medium		\|Medium
	\|-		\|-
	\|~~Zelp sense~~		\|ZELP Sense
	\|Low		\|Low
	\|Low		\|Low

Cvangemert: Added ZELP sense to table

2026-03-16T08:45:50Z

Added ZELP sense to table

@@ Line 70: / Line 70: @@
 |Low-Medium
 |Medium
 |}Table 4. Summary of the main features of methods for measuring CH<sub>4</sub> output by individual animals.

Cvangemert: Added section 20 to all methane measurement subsections and edited links

2026-02-18T07:46:17Z

Added section 20 to all methane measurement subsections and edited links

← Older revision		Revision as of 07:46, 18 February 2026
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	The main features of methods for measuring CH<sub>4</sub> output by individual animals are summarised in Table 4. Values for each feature are based on experience of experts in METHAGENE WG2 who have used the methods. All values are relative, and somewhat subjective, because absolute values will depend on installation and implementation of each method at different research centres. It should be noted that the measuring methods can be divided in two major sections: methods that measure the concentration and flux of CH<sub>4</sub> (e.g. the respiration chamber), and methods that measure the flux of CH<sub>4</sub> through the device (e.g. GreenFeed). This affects the useability of the methods for answering research questions – please see also the recommendations at the end of these guidelines.		The main features of methods for measuring CH<sub>4</sub> output by individual animals are summarised in Table 4. Values for each feature are based on experience of experts in METHAGENE WG2 who have used the methods. All values are relative, and somewhat subjective, because absolute values will depend on installation and implementation of each method at different research centres. It should be noted that the measuring methods can be divided in two major sections: methods that measure the concentration and flux of CH<sub>4</sub> (e.g. the respiration chamber), and methods that measure the flux of CH<sub>4</sub> through the device (e.g. GreenFeed). This affects the useability of the methods for answering research questions – please see also the recommendations at the end of these guidelines.

	* [[Respiration chamber]]		* [[Section 20: Respiration chamber\|Respiration chamber]]
	* [[Portable Accumulation Chamber\|Portable Accumulation Chambers]]		* [[Section 20: Portable Accumulation Chamber\|Portable Accumulation Chambers]]
	* [[Wearables]]		* [[Section 20: Wearables\|Wearables]]
	* [[Breath sampling during milk and feeding]]		* [[Breath sampling during milk and feeding]]
	* [[Section 20: Sniffer SOP\|Sniffer SOP]]		* [[Section 20: Sniffer SOP\|Sniffer SOP]]
	* [[Section 20: Greenfeed SOP\|Greenfeed SOP]]		* [[Section 20: Greenfeed SOP\|Greenfeed SOP]]
	* [[Laser Methane Detector]]		* [[Section 20: Laser Methane Detector\|Laser Methane Detector]]
	{\| class="wikitable"		{\| class="wikitable"
	\|-		\|-

Cvangemert at 07:40, 18 February 2026

2026-02-18T07:40:15Z

← Older revision		Revision as of 07:40, 18 February 2026
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	* [[Breath sampling during milk and feeding]]		* [[Breath sampling during milk and feeding]]
	* [[Section 20: Sniffer SOP\|Sniffer SOP]]		* [[Section 20: Sniffer SOP\|Sniffer SOP]]
	* [[Greenfeed SOP]]		* [[Section 20: Greenfeed SOP\|Greenfeed SOP]]
	* [[Laser Methane Detector]]		* [[Laser Methane Detector]]
	{\| class="wikitable"		{\| class="wikitable"

Cvangemert at 07:39, 18 February 2026

2026-02-18T07:39:24Z

← Older revision		Revision as of 07:39, 18 February 2026
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	* [[Wearables]]		* [[Wearables]]
	* [[Breath sampling during milk and feeding]]		* [[Breath sampling during milk and feeding]]
	* [[Sniffer SOP]]		* [[Section 20: Sniffer SOP\|Sniffer SOP]]
	* [[Greenfeed SOP]]		* [[Greenfeed SOP]]
	* [[Laser Methane Detector]]		* [[Laser Methane Detector]]

Cvangemert at 07:37, 18 February 2026

2026-02-18T07:37:06Z

← Older revision		Revision as of 07:37, 18 February 2026
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	* [[Respiration chamber]]		* [[Respiration chamber]]
	* [[Portable Accumulation Chamber\|Portable Accumulation Chambers]]		* [[Portable Accumulation Chamber\|Portable Accumulation Chambers]]
	* [[~~SF6~~]]		* [[Wearables]]
	* [[Breath sampling during milk and feeding]]		* [[Breath sampling during milk and feeding]]
	* [[Sniffer SOP]]		* [[Sniffer SOP]]

Cmosconi at 17:52, 3 February 2026

2026-02-03T17:52:54Z

← Older revision		Revision as of 17:52, 3 February 2026
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	</big>		</big>
	</center>		</center>
	Several factors influence the choice of measurement method such as cost, level of accuracy, precision, scope of application, and scale, which vary across disciplines (Cassandro et al., 2013<ref>Cassandro, M. 2013. Comparing local and cosmopolitan cattle breeds on added values for milk and cheese production and their predicted methane emissions. Animal Genetic Resources/Ressources génétiques animales/Recursos genéticos animales, available on CJO2013. doi:10.1017/S2078 63361200077X</ref>; Hammond et al., 2016A<ref>Hammond, K.J., Crompton, L.A., Bannink, A., Dijkstra, J., Yáñez-Ruiz, D.R., O’Kiely, P., Kebreab, E., Eugenè, M.A., Yu, Z., Shingfield, K.J., Schwarm, A., Hristov, A.N., and Reynolds, C.K. 2016A. Review of current in vivo measurement techniques for quantifying enteric methane emission from ruminants. Anim. Feed Sci. Technol. 219:13–30. doi:10.1016/j.anifeedsci.2016.05.018.</ref>; Garnsworthy et al., 2019<ref>Garnsworthy, P.C. Difford, G.F. Bell, M.J. Bayat, A.R. Huhtanen, P. Kuhla, B. Lassen, J. Peiren, N. Pszczola, M; Sorg, D. Visker, M.H., and Yan, T. 2019 Comparison of Methods to Measure Methane for Use in Genetic Evaluation of Dairy Cattle. Animals 9:837, 12p.</ref>). For instance, genetic selection programs require CH<sub>4</sub> measurements on thousands of related individuals under the environmental conditions in which the animals are expected to perform (Falconer and Mackay, 1996<ref>Falconer, D., and Macka,y T. 1996. Introduction to quantitative genetics (4th edn). ISBN-13: 978-0582243026; ISBN-10: 0582243025</ref>). This can be challenging because dairy cattle perform in a wide range of conditions (e.g. grazing vs indoor housing). There are a number of different measurement methods currently being employed, each with advantages and disadvantages in terms of the factors listed above. The currently accepted and widely used measurement methods are listed and described below. The main features of methods for measuring CH<sub>4</sub> output by individual animals are summarised in Table 4. Values for each feature are based on experience of experts in METHAGENE WG2 who have used the methods. All values are relative, and somewhat subjective, because absolute values will depend on installation and implementation of each method at different research centres. It should be noted that the measuring methods can be divided in two major sections: methods that measure the concentration and flux of CH<sub>4</sub> (e.g. the respiration chamber), and methods that measure the flux of CH<sub>4</sub> through the device (e.g. GreenFeed). This affects the useability of the methods for answering research questions – please see also the recommendations at the end of these guidelines.		Several factors influence the choice of measurement method such as cost, level of accuracy, precision, scope of application, and scale, which vary across disciplines (Cassandro et al., 2013<ref>Cassandro, M. 2013. Comparing local and cosmopolitan cattle breeds on added values for milk and cheese production and their predicted methane emissions. Animal Genetic Resources/Ressources génétiques animales/Recursos genéticos animales, available on CJO2013. doi:10.1017/S2078 63361200077X</ref>; Hammond et al., 2016A<ref>Hammond, K.J., Crompton, L.A., Bannink, A., Dijkstra, J., Yáñez-Ruiz, D.R., O’Kiely, P., Kebreab, E., Eugenè, M.A., Yu, Z., Shingfield, K.J., Schwarm, A., Hristov, A.N., and Reynolds, C.K. 2016A. Review of current in vivo measurement techniques for quantifying enteric methane emission from ruminants. Anim. Feed Sci. Technol. 219:13–30. doi:10.1016/j.anifeedsci.2016.05.018.</ref>; Garnsworthy et al., 2019<ref>Garnsworthy, P.C. Difford, G.F. Bell, M.J. Bayat, A.R. Huhtanen, P. Kuhla, B. Lassen, J. Peiren, N. Pszczola, M; Sorg, D. Visker, M.H., and Yan, T. 2019 Comparison of Methods to Measure Methane for Use in Genetic Evaluation of Dairy Cattle. Animals 9:837, 12p.</ref>). For instance, genetic selection programs require CH<sub>4</sub> measurements on thousands of related individuals under the environmental conditions in which the animals are expected to perform (Falconer and Mackay, 1996<ref>Falconer, D., and Macka,y T. 1996. Introduction to quantitative genetics (4th edn). ISBN-13: 978-0582243026; ISBN-10: 0582243025</ref>). This can be challenging because dairy cattle perform in a wide range of conditions (e.g. grazing vs indoor housing).

			There are a number of different measurement methods currently being employed, each with advantages and disadvantages in terms of the factors listed above. The currently accepted and widely used measurement methods are listed and described below.

			The main features of methods for measuring CH<sub>4</sub> output by individual animals are summarised in Table 4. Values for each feature are based on experience of experts in METHAGENE WG2 who have used the methods. All values are relative, and somewhat subjective, because absolute values will depend on installation and implementation of each method at different research centres. It should be noted that the measuring methods can be divided in two major sections: methods that measure the concentration and flux of CH<sub>4</sub> (e.g. the respiration chamber), and methods that measure the flux of CH<sub>4</sub> through the device (e.g. GreenFeed). This affects the useability of the methods for answering research questions – please see also the recommendations at the end of these guidelines.

	* [[Respiration chamber]]		* [[Respiration chamber]]
	* [[Portable Accumulation Chamber\|Portable Accumulation Chambers]]		* [[Portable Accumulation Chamber\|Portable Accumulation Chambers]]
	* [[~~Wearables~~]]		* [[SF6]]
	* [[Breath sampling during milk and feeding]]		* [[Breath sampling during milk and feeding]]
	* [[Sniffer SOP]]		* [[Sniffer SOP]]
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	{\| class="wikitable"		{\| class="wikitable"
	\|-		\|-
	! colspan="7" \| ''Table 1. ~~Summary~~ of the ~~main features of methods for measuring CH<sub>4</sub> output by individual animals~~.''		! colspan="3" \| ''Table 1. Table one caption (in first row of the table).''
			\|- style="background-color:#efefef;"
	\|+		\|+
	!Method		!Method
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	\|Low-Medium		\|Low-Medium
	\|Medium		\|Medium
	\|-		\|}Table 4. Summary of the main features of methods for measuring CH<sub>4</sub> output by individual animals.
	~~\|ZELP Sense~~
	~~\|Low~~
	~~\|Low~~
	~~\|Low-Medium~~
	~~\|Medium~~
	~~\|Low~~
	~~\|High~~
	\|}

Cvangemert at 12:27, 22 December 2025

2025-12-22T12:27:49Z

← Older revision		Revision as of 12:27, 22 December 2025
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	\|Medium		\|Medium
	\|-		\|-
	\|ZELP ~~sense~~		\|ZELP Sense
	\|Low		\|Low
	\|Low		\|Low

Cvangemert: Table title

2025-12-19T06:58:19Z

Table title

← Older revision		Revision as of 06:58, 19 December 2025
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	{\| class="wikitable"		{\| class="wikitable"
	\|-		\|-
	! colspan="3" \| ''Table 1. ~~Table one caption (in first row~~ of the ~~table)~~.''		! colspan="7" \| ''Table 1. Summary of the main features of methods for measuring CH<sub>4</sub> output by individual animals.''
	~~\|- style="background-color:#efefef;"~~
	\|+		\|+
	!Method		!Method
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	\|Low		\|Low
	\|High		\|High
	\|}~~Table 4. Summary of the main features of methods for measuring CH<sub>4</sub> output by individual animals.~~		\|}

Cvangemert: Added ZELP sense

2025-12-19T06:57:07Z

Added ZELP sense

@@ Line 66: / Line 66: @@
 |Low-Medium
 |Medium
 |}Table 4. Summary of the main features of methods for measuring CH<sub>4</sub> output by individual animals.