Please use this identifier to cite or link to this item:
Title: Low-methane yield sheep have smaller rumens and shorter rumen retention time
Contributor(s): Goopy, John P  (author); Donaldson, Alastair (author); Hegarty, Roger  (author); Vercoe, Phillip E (author); Haynes, Fay Emma Milton  (author); Barnett, Mark  (author)orcid ; Oddy, Hutton  (author)orcid 
Publication Date: 2014
Open Access: Yes
DOI: 10.1017/S0007114513002936Open Access Link
Handle Link:
Abstract: 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.
Publication Type: Journal Article
Source of Publication: British Journal of Nutrition, 111(4), p. 578-585
Publisher: Cambridge University Press
Place of Publication: United Kingdom
ISSN: 1475-2662
Fields of Research (FoR) 2008: 070299 Animal Production not elsewhere classified
Fields of Research (FoR) 2020: 300399 Animal production not elsewhere classified
Socio-Economic Objective (SEO) 2008: 839802 Management of Greenhouse Gas Emissions from Animal Production
Socio-Economic Objective (SEO) 2020: 190302 Management of greenhouse gas emissions from animal production
Peer Reviewed: Yes
HERDC Category Description: C1 Refereed Article in a Scholarly Journal
Appears in Collections:Journal Article

Files in This Item:
2 files
File Description SizeFormat 
Show full item record


checked on May 27, 2023

Page view(s)

checked on Mar 8, 2023
Google Media

Google ScholarTM



Items in Research UNE are protected by copyright, with all rights reserved, unless otherwise indicated.