University Library
  • Login
A gateway to Melbourne's research publications
Minerva Access is the University's Institutional Repository. It aims to collect, preserve, and showcase the intellectual output of staff and students of the University of Melbourne for a global audience.
View Item 
  • Minerva Access
  • Veterinary and Agricultural Sciences
  • Veterinary and Agricultural Sciences Collected Works
  • Veterinary and Agricultural Sciences Collected Works - Research Publications
  • View Item
  • Minerva Access
  • Veterinary and Agricultural Sciences
  • Veterinary and Agricultural Sciences Collected Works
  • Veterinary and Agricultural Sciences Collected Works - Research Publications
  • View Item
JavaScript is disabled for your browser. Some features of this site may not work without it.

    Short-term heat stress and vitamin E supplementation affect carcass weight, mucle omega-6 fatty acid and meat quality in lambs

    Thumbnail
    Download
    Published version (286.5Kb)

    Citations
    Altmetric
    Author
    PONNAMPALAM, EN; Chauhan, SS; Kerr, M; Hopkins, DL; Plozza, T; Dunshea, F
    Date
    2016
    Source Title
    Meat for Global Sustainability: 62nd International Congress of Meat Science and Technology
    Publisher
    Elsevier
    University of Melbourne Author/s
    Chauhan, Surinder Singh
    Affiliation
    Veterinary and Agricultural Sciences
    Agriculture and Food Systems
    Metadata
    Show full item record
    Document Type
    Conference Paper
    Citations
    PONNAMPALAM, E. N., Chauhan, S. S., Kerr, M., Hopkins, D. L., Plozza, T. & Dunshea, F. (2016). Short-term heat stress and vitamin E supplementation affect carcass weight, mucle omega-6 fatty acid and meat quality in lambs. Meat for Global Sustainability: 62nd International Congress of Meat Science and Technology, Elsevier.
    Access Status
    Open Access
    URI
    http://hdl.handle.net/11343/234484
    Abstract
    The effect of short term-heat stress and -vitamin E supplementation on carcass traits and muscle quality – vitamin E, nutritional value and retail colour of lambs was investigated. Forty-eight lambs (crossbred; 42 ± 2 kg body weight, 7 mo age) were randomly allocated by body weight to one of three groups (n = 16) and fed 3 different doses of Vitamin E and Se. The doses of Vitamin E and Se for control (CON), moderate (MOD), and supranutritional (SUP) diets were 28, 130, 228 mg/kg DM as α-tocopherol acetate and 0.16, 0.66, 1.16 mg Se as SelPlex™ kg/DM, respectively. Lambs were fed for 4 weeks followed by a week of exposure to heat treatment. After 4 weeks feeding in individual pens, including 1 week of adaptation, lambs were moved to metabolism cages for 1 week and allocated to one of 2 heat regimes (8 per feeding group): thermoneutral (TN) (18–21◦C and 40–50% relative humidity) or heat stress (HS) (28–40◦C and 30–40% relative humidity) conditions. Final body weight (P = 0.05, 44.1 vs 46.6 kg) and hot carcass weight (P = 0.01, 21.1 vs 22.5 kg) were significantly affected by diet such that lambs supplemented with SUP levels of antioxidants had a higher FBW and HCW as compared with lambs fed MOD and CON antioxidant diets, respectively. Vitamin E concentration in the longissimus lumborum (LL) muscle tended to be higher in lambs fed moderate or supranutritional levels of antioxidants compared with control lambs and values from all treatments were below the threshold (3.2 mg/kg muscle) for optimal maintenance of retail colour. Vitamin E supplementation also reduced lipid oxidation of aged meat, as assessed by thiobarbituric acid reactive substances (TBARS) formation after 72 h of display. One week of heat stress to lambs significantly increased muscle linoleic acid concentration, which in turn increased total n-6 concentration compared with the control group. Results demonstrate that 4 weeks of vitamin E supplementation or 1 week heat stress might not have been adequate to make significant changes in muscle vitamin E concentration and fatty acid composition, which in turn can influence retail colour stability of meat.

    Export Reference in RIS Format     

    Endnote

    • Click on "Export Reference in RIS Format" and choose "open with... Endnote".

    Refworks

    • Click on "Export Reference in RIS Format". Login to Refworks, go to References => Import References


    Collections
    • Minerva Elements Records [45689]
    • Agriculture and Food Systems - Research Publications [542]
    • Veterinary and Agricultural Sciences Collected Works - Research Publications [300]
    Minerva AccessDepositing Your Work (for University of Melbourne Staff and Students)NewsFAQs

    BrowseCommunities & CollectionsBy Issue DateAuthorsTitlesSubjectsThis CollectionBy Issue DateAuthorsTitlesSubjects
    My AccountLoginRegister
    StatisticsMost Popular ItemsStatistics by CountryMost Popular Authors