Low-methane yield sheep have smaller rumens and shorter rumen retention time

J.P. Goopy, R.S. Hegarty, Phil Vercoe, F.E.M. Haynes, M.C. Barnett, V.H. Oddy, A. Donaldson

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    138 Citations (Scopus)


    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=A 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
    Original languageEnglish
    Pages (from-to)578-585
    JournalBritish Journal of Nutrition
    Issue number4
    Publication statusPublished - 2014


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