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    • Journal of Range Management, Volume 52 (1999)
    • Journal of Range Management, Volume 52, Number 4 (July 1999)
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    Group size effects on grazing behaviour and efficiency in sheep

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    Author
    Sevi, A.
    Casamassima, D.
    Muscio, A.
    Issue Date
    1999-07-01
    Keywords
    group size
    physical activity
    ewes
    liveweight gain
    body weight
    selective grazing
    protein intake
    energy intake
    seasonal variation
    feed intake
    
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    Show full item record
    Citation
    Sevi, A., Casamassima, D., & Muscio, A. (1999). Group size effects on grazing behaviour and efficiency in sheep. Journal of Range Management, 52(4), 327-331.
    Publisher
    Society for Range Management
    Journal
    Journal of Range Management
    URI
    http://hdl.handle.net/10150/643951
    DOI
    10.2307/4003541
    Additional Links
    https://rangelands.org/
    Abstract
    Two grazing trials were conducted during early winter (January 1996) and spring (April 1996) to evaluate the effect of group size on grazing efficiency and behaviour of sheep. Three treatments were tested, large (LG), medium (MG) and small group size (SG), with 2 replicates for each treatment of 12, 9, and 6 ewes, respectively. Groups were homogeneous for age and weight. Paddock size furnished 10 m(2) per sheep per day. Group size did not affect grazing efficiency and herbage intake in the winter, but in the spring, when herbage mass was more plentiful, the ewes in the small groups grazed shorter, had a lower herbage intake and a less efficient use of forage. Consequently, the sheep in the small groups gained less weight than those in the large groups in spring. Neither group size nor seasonal changes in forage quantity or quality influenced sheep selectivity. These results suggest that the choice of a proper flock size at pasture can play a major role in optimizing grazing efficiency in sheep, especially when feeding is largely based on grazing, as generally occurs in countries of the Mediterranean basin in spring. Under the conditions of this study, our results indicate that a flock size of more than 6 sheep should be used for studies on sheep grazing behaviour.
    Type
    text
    Article
    Language
    en
    ISSN
    0022-409X
    ae974a485f413a2113503eed53cd6c53
    10.2307/4003541
    Scopus Count
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    Journal of Range Management, Volume 52, Number 4 (July 1999)

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