Low-methane yield sheep have smaller rumens and shorter rumen retention time
Open accessAbstract
In the present study, following the measurement of methane emissions from 160 mature ewes three times, a subset of twenty ewes was selected for further emission and physiological studies. Ewes were selected on the basis of methane yield (MY; g CH4/kg DM intake) being low (Low MY: >1 sd below the mean; n 10) or high (High MY: >1 sd above the mean; n 10) when fed a blended chaff ration at a fixed feeding level (1·2-fold maintenance energy requirements). The difference between the Low- and High-MY groups observed at the time of selection was maintained (P= 0·001) when remeasured 1-7 months later during digesta kinetics studies. Low MY was associated with a shorter mean retention time of particulate (P< 0·01) and liquid (P< 0·001) digesta, less amounts of rumen particulate contents (P< 0·01) and a smaller rumen volume (P< 0·05), but not apparent DM digestibility (P= 0·27) or urinary allantoin excretion (P= 0·89). Computer tomography scanning of the sheep's rumens after an overnight fast revealed a trend towards the Low-MY sheep having more clearly demarcated rumen gas and liquid phases (P= 0·10). These findings indicate that the selection of ruminants for low MY may have important consequences for an animal's nutritional physiology.
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Both a shorter rumen retention time and a smaller rumen result in reduced methane yield.
“It has also been demonstrated that both a shorter rumen retention time and a smaller rumen result in reduced methane yield (Goopy et al., 2014).”
From Addressing global ruminant agricultural challenges through understanding the rumen microbiome: past, present, and future (2018) · cites this paper as Goopy et al., 2014
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- Authors
- Goopy, J. P., Donaldson, A., Hegarty, R., Vercoe, P. E., Haynes, F., Barnett, M., & Oddy, V. H.
- Affiliations
- University of New England (AU)
- The University of Western Australia (AU)
- Corresponding author
- Goopy, John P.
- Venue
- British Journal Of Nutrition
- Publisher
- Cambridge University Press (CUP)
- Published
- 2013-10-08
- Volume
- 111
- Issue
- 4
- Pages
- 578-585
- ISSN
- 0007-1145 (ISSN-L)
- 1475-2662
- OpenAlex
- W1991461079
- Cited by
- 230
- References
- 26
- Citations by year
- 2026: 16 · 2025: 18 · 2024: 14 · 2023: 18 · 2022: 29 · 2021: 15 · 2020: 14 · 2019: 20 · 2018: 19 · 2017: 20 · 2016: 17 · 2015: 19 · 2014: 10
- FWCI
- 32.58
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Locations
- British Journal Of Nutrition (publishedVersion)
- PubMed (publishedVersion)
- UWA Profiles and Research Repository (UWA) (submittedVersion)
- RUNE (Research UNE) (submittedVersion)
- Funders
- Australian Government
- Meat and Livestock Australia
- NSW Department of Primary Industries
- Topics
- Life Sciences › Agricultural and Biological Sciences › Agronomy and Crop Science › Ruminant Nutrition and Digestive Physiology
- Life Sciences › Agricultural and Biological Sciences › Animal Science and Zoology › Animal Nutrition and Physiology
- Physical Sciences › Engineering › Building and Construction › Anaerobic Digestion and Biogas Production
- Keywords
- methane yield, rumen volume, rumen retention time, digesta kinetics, rumen fermentation, ewes
- MeSH terms
- Animals, Animal Feed, Animal Nutritional Physiological Phenomena, Dietary Fiber, Digestion, Female, Gastrointestinal Transit, Methane, Rumen, Sheep, Greenhouse Effect
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