Effects of late gestation shearing on BW, feed intake and plasma metabolite concentrations in Rambouillet ewes managed outdoors during winter

被引:1
|
作者
Murphy, T. W. [1 ]
Stewart, W. C. [2 ]
Smith, C. G. [1 ]
Taylor, J. B. [3 ]
机构
[1] Montana State Univ, Dept Anim & Range Sci, Bozeman, MT 59717 USA
[2] Univ Wyoming, Dept Anim Sci, Laramie, WY 82071 USA
[3] ARS, USDA, Range Sheep Prod Efficiency Res Unit, US Sheep Expt Stn, Dubois, ID 83423 USA
关键词
dry matter intake; finewool sheep; growth; litter size; metabolism; MID-PREGNANCY SHEARING; BIRTH-WEIGHT; LAMBS; SURVIVAL; SHORN; SIZE;
D O I
10.1017/S175173111800191X
中图分类号
S8 [畜牧、 动物医学、狩猎、蚕、蜂];
学科分类号
0905 ;
摘要
The majority of lambs in the United States are born from late winter to early spring and pregnant ewes are generally sheared in the last third of pregnancy. Although there are benefits to shearing before parturition, shorn animals may be more vulnerable to the cold, highly variable climatic conditions associated with these seasons. The objective of this study was to determine if late gestation shearing induces differences in individual BW, dry matter intake (DMI) and plasma metabolite concentration of finewool ewes managed outdoors during winter. Thirty-six mature, pregnant Rambouillet ewes (3.8 +/- 0.45 years; 76.8 +/- 11.4 kg) were managed in a drylot with ad libitum access to pelleted alfalfa in bunks capable of measuring individual daily DMI. The treatment group consisted of ewes sheared at similar to 5 weeks before the estimated parturition date (shorn; n=18). Unshorn ewes (n=18) remained in full fleece throughout the experiment and were shorn on the last day of the experiment similar to 2 weeks before the estimated parturition date. Blood was collected on days 0 (before shearing shorn group), 7, 14 and 21 (before shearing unshorn group) of the trial, and plasma was isolated and analyzed for non-esterified fatty acid (NEFA), beta-hydroxybutyrate (BHB) and glucose (GLU) concentrations. There was no effect of shearing on ewe DMI or BW during the trial (P > 0.35). Plasma NEFA and GLU concentrations were similar (P > 0.36) between shearing groups, though plasma BHB concentration was 103.7 mu mol/l greater (24.1%; P<0.01) in unshorn ewes. Lamb BW at birth was not affected (P=0.30) by ewe shearing treatment. Under conditions of this study, no differences in economically important aspects of sheep production were observed between shorn and unshorn pregnant ewes.
引用
收藏
页码:600 / 605
页数:6
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共 19 条
  • [1] FEED-INTAKE DURING GESTATION AFFECTS APPETITE, PLASMA METABOLITE AND PLASMA-INSULIN CONCENTRATIONS IN LACTATING SOWS
    WELDON, WC
    LEWIS, AJ
    KOVAR, JL
    [J]. FASEB JOURNAL, 1991, 5 (05): : A1315 - A1315
  • [2] POSTPARTUM HYPOPHAGIA IN PRIMIPAROUS SOWS .1. EFFECTS OF GESTATION FEEDING LEVEL ON FEED-INTAKE, FEEDING-BEHAVIOR, AND PLASMA METABOLITE CONCENTRATIONS DURING LACTATION
    WELDON, WC
    LEWIS, AJ
    LOUIS, GF
    KOVAR, JL
    GIESEMANN, MA
    MILLER, PS
    [J]. JOURNAL OF ANIMAL SCIENCE, 1994, 72 (02) : 387 - 394
  • [3] Effects of feed intake restriction during late pregnancy on maternal metabolic changes and fetal development in ewes
    Zhang, C. Z.
    Liu, Y. C.
    Gao, F.
    [J]. CZECH JOURNAL OF ANIMAL SCIENCE, 2015, 60 (12) : 557 - 563
  • [4] Effects of extended grazing during mid, late or throughout pregnancy, and winter shearing of housed ewes, on ewe and lamb performance
    Keady, T. W. J.
    Hanrahan, J.
    Flanagan, S.
    [J]. IRISH JOURNAL OF AGRICULTURAL AND FOOD RESEARCH, 2007, 46 (02) : 169 - 180
  • [5] The effects of nicotinic acid supplementation during late-gestation on lipolysis and feed intake during the transition period.
    Chamberlain, J. L.
    French, P. D.
    [J]. JOURNAL OF ANIMAL SCIENCE, 2006, 84 : 232 - 232
  • [6] CEREBROSPINAL-FLUID AND PLASMA-GLUCOSE CONCENTRATIONS OF OVINE PREGNANCY TOXEMIA CASES, INAPPETANT EWES AND NORMAL EWES DURING LATE-GESTATION
    SCOTT, PR
    SARGISON, ND
    PENNY, CD
    PIRIE, RS
    KELLY, JM
    [J]. BRITISH VETERINARY JOURNAL, 1995, 151 (01): : 39 - 44
  • [7] Supplementing dietary betaine during late gestation increases plasma betaine and methionine concentrations in pregnant Merino ewes but not neonatal lambs
    Brougham, Billie -Jaye
    Weaver, Alice C.
    Swinbourne, Alyce M.
    Cottrell, Jeremy J.
    Kelly, Jennifer M.
    Kleemann, David O.
    van Wettere, William H. E. J.
    [J]. SMALL RUMINANT RESEARCH, 2024, 232
  • [8] EFFECTS OF PHOTOPERIOD AND ENERGY-INTAKE DURING LATE PREGNANCY ON THE PLASMA-CONCENTRATIONS OF PRL, GH AND PL AND ON MILK-PRODUCTION IN MILKED EWES
    PERIER, A
    BOCQUIER, F
    KANN, G
    MARTINET, J
    [J]. REPRODUCTION NUTRITION DEVELOPMENT, 1986, 26 (1B): : 391 - 392
  • [9] The Effects of Late Gestation Nutrient Restriction on Heifer Offspring Feed Intake and Metabolites and Hormones During a Feeding Challenge.
    Tipton, J. E.
    Ricks, R. E.
    LeMaster, C. T.
    Long, N. M.
    [J]. JOURNAL OF ANIMAL SCIENCE, 2017, 95 : 42 - 42
  • [10] Effects ofOpuntia ficus-indicain the diet of primiparous sows on the metabolic profile during late gestation and lactation and feed intake during lactation
    Ordaz, Gerardo
    Juarez, Aureliano
    Perez, Rosa E.
    Martinez, Hector E.
    Ortiz, Ruy
    [J]. JOURNAL OF ANIMAL PHYSIOLOGY AND ANIMAL NUTRITION, 2020, 104 (06) : 1884 - 1895