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    Age and Body Condition of Goats Influence Consumption of Juniper and Monoterpene-Treated Feed

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    Author
    Frost, Rachel A.
    Launchbaugh, Karen L.
    Taylor, Charles A.
    Issue Date
    2008-01-01
    Keywords
    intake
    Juniperus
    nutrition
    terpenoids
    
    Metadata
    Show full item record
    Citation
    Frost, R. A., Launchbaugh, K. L., & Taylor, C. A. (2008). Age and body condition of goats influence consumption of juniper and monoterpene-treated feed. Rangeland Ecology & Management, 61(1), 48-54.
    Publisher
    Society for Range Management
    Journal
    Rangeland Ecology & Management
    URI
    http://hdl.handle.net/10150/642924
    DOI
    10.2111/06-160R1.1
    Additional Links
    https://rangelands.org/
    Abstract
    Redberry juniper (Juniperus pinchotii Sudworth) is an invasive, evergreen tree that is rapidly expanding throughout western and central Texas. Goats will consume some juniper on rangelands; however, intake is limited. The objective of our research was to determine how the age and body condition of goats influence their consumption of juniper and an artificial feed containing 4 monoterpenes. Two separate experiments were conducted. Experiment 1 examined the intake of redberry juniper foliage and used 39 goats either young (2 yr) or mature (> 6 yr). One-half of each age group was fed appropriate basal rations to reach either a high (HBC) or low body condition (LBC). Goats in LBC ate more (P<0.01, 8.6g kg-1 body weight [BW] +/- 0.7 SE) juniper than those in HBC (2.3 g kg-1 BW +/- 0.3 SE), and young animals consumed more (P < 0.05, 7.2 g kg-1 BW +/- 0.7 SE) juniper than mature goats (3.9 g kg-1 BW +/- 0.5 SE) across body condition treatments. In experiment 2, 36 goats, either young (2 yr) or mature (> 6 yr) and in either HBC or LBC, were offered a synthetic ration treated with 20.8 g kg-1 of 4 monoterpenes found in redberry juniper. Goats in LBC ate more (P < 0.01, 25.3 g kg-1 BW +/- 1.0 SE) of the terpene-treated feed than those in HBC (17.5 g kg-1 BW +/- 0.7 SE), and young animals ate more (P < 0.05, 22.5 g kg-1 BW +/- 0.8 SE) than mature goats (20.3 g kg-1 BW +/- 0.8 SE) across body condition treatments. Total intake as a proportion of body weight was also affected by body condition. Age and body condition are important factors that influence intake of chemically defended plants. A better understanding of how these attributes affect diet selection will aid livestock producers in improving grazing management. 
    Type
    text
    Article
    Language
    en
    ISSN
    0022-409X
    ae974a485f413a2113503eed53cd6c53
    10.2111/06-160R1.1
    Scopus Count
    Collections
    Rangeland Ecology & Management, Volume 61, Number 1 (January 2008)

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