Shade effects on performance, carcass traits, physiology, and behavior of heat-stressed feedlot heifers

被引:0
|
作者
Mitlöhner, FM [1 ]
Galyean, ML [1 ]
McGlone, JJ [1 ]
机构
[1] Texas Tech Univ, Dept Anim Sci & Food Technol, Lubbock, TX 79409 USA
关键词
behavior; feedlots; heat stress; performance; physiology; shade;
D O I
暂无
中图分类号
S8 [畜牧、 动物医学、狩猎、蚕、蜂];
学科分类号
0905 ;
摘要
To determine whether shade influences performance, carcass traits, immunology, respiration rate, and behavior of cattle under conditions similar to those in commercial feedlots, we used 168 heifers in, 12 soil-surfaced pens. Six pens were shaded with a galvanized steel-roofed shade (approximately 4 in high), allowing for 2.12 m(2) of shade/heifer, and six pens served as the unshaded control. Heifers were fed a 90% concentrate diet during the 121-d trial that began in mid-June, performance variables (DMI, BW, ADG, gain:feed) were measured, and dietary concentrations of NEm and NEg calculated from performance data. A blood sample was collected to assess immune measures. Respiration rates and behaviors (feeding, drinking, walking, standing, lying, agonistic, and bulling) also were measured during the study. Carcass data (yield grade, kidney, pelvic, and heart fat, longissimus muscle area, hot carcass weight, quality grade, liver abscess rate, and incidence of dark-cutting beef) were collected at slaughter. Shaded heifers had higher (P < 0.05) DMI, ADG, and final BW than unshaded heifers. The gain:feed ratio and calculated dietary NEm and NEg concentrations did not differ (P > 0.26) between treatments. Most carcass traits did not differ between treatments, but more, (P < 0.02) carcasses of heifers in shaded pens graded USDA Choice than those in unshaded pens, which resulted primarily from the incidence of dark cutters being decreased (P < 0.04) by approximately half in carcasses from shaded compared with unshaded heifers. Respiration rate and percentage of circulating neutrophils were decreased (P < 0.01) for shaded compared with unshaded heifers. The treatment x time of day effect was significant (P < 0.05) for all behavioral measurements. Shaded heifers spent more time laying down (0800, 1200, and 1500, P < 0.05) and less time standing (1200 and 1500, P < 0.05) than unshaded heifers. Agonistic behavior was less (P < 0.05) for shaded than for unshaded heifers at 1900 and 2000, and bulling was less (P < 0.05) for shaded than unshaded heifers at 2100. Results suggest that shade improved performance and altered behavior by feedlot heifers during the summertime in West Texas.
引用
收藏
页码:2043 / 2050
页数:8
相关论文
共 50 条
  • [1] Shade and water misting effects on behavior, physiology, performance, and carcass traits of heat-stressed feedlot cattle
    Mitlöhner, FM
    Morrow, JL
    Dailey, JW
    Wilson, SC
    Galyean, ML
    Miller, MF
    McGlone, JJ
    [J]. JOURNAL OF ANIMAL SCIENCE, 2001, 79 (09) : 2327 - 2335
  • [2] The effects of shade on performance, carcass classes and behaviour of heat-stressed feedlot cattle at the finisher phase
    Blaine, K. L.
    Nsahlai, Ignatius Verla
    [J]. TROPICAL ANIMAL HEALTH AND PRODUCTION, 2011, 43 (03) : 609 - 615
  • [3] The effects of shade on performance, carcass classes and behaviour of heat-stressed feedlot cattle at the finisher phase
    K. L. Blaine
    Ignatius Verla Nsahlai
    [J]. Tropical Animal Health and Production, 2011, 43 : 609 - 615
  • [4] Shade effect on behaviour, physiology, performance, and carcass weight of heat-stressed feedlot steers in humid subtropical area
    Canozzi, M. E. A.
    Clariget, J.
    Roig, G.
    Perez, E.
    Aznarez, V
    Banchero, G.
    La Manna, A.
    [J]. ANIMAL PRODUCTION SCIENCE, 2022, 62 (17) : 1692 - 1705
  • [5] Effects of shade and sprinklers on performance, behavior, physiology, and the environment of heifers
    Marcillac-Embertson, N. M.
    Robinson, P. H.
    Fadel, J. G.
    Mitloehner, F. M.
    [J]. JOURNAL OF DAIRY SCIENCE, 2009, 92 (02) : 506 - 517
  • [6] Free ferulic acid supplementation of heat-stressed hair ewe lambs: Oxidative status, feedlot performance, carcass traits and meat quality
    Mariela Valadez-Garcia, Karen
    Avendano-Reyes, Leonel
    Diaz-Molina, Raul
    Mellado, Miguel
    Meza-Herrera, Cesar A.
    Correa-Calderon, Abelardo
    Macias-Cruz, Ulises
    [J]. MEAT SCIENCE, 2021, 173
  • [7] THE INFLUENCE OF ZERANOL ON FEEDLOT PERFORMANCE AND CARCASS TRAITS OF CULLED COWS AND HEIFERS
    PRICE, MA
    MAKARECHIAN, M
    [J]. CANADIAN JOURNAL OF ANIMAL SCIENCE, 1982, 62 (03) : 739 - 744
  • [8] Effects of Supplemental Chromium Propionate on Serum Lipids, Carcass Traits, and Meat Quality of Heat-Stressed Broilers
    Fang Xiao
    Degulina Ao
    Bo Zhou
    Jerry W Spears
    Xi Lin
    Yanling Huang
    [J]. Biological Trace Element Research, 2017, 176 : 401 - 406
  • [9] Effects of Supplemental Chromium Propionate on Serum Lipids, Carcass Traits, and Meat Quality of Heat-Stressed Broilers
    Xiao, Fang
    Ao, Degulina
    Zhou, Bo
    Spears, Jerry W.
    Lin, Xi
    Huang, Yanling
    [J]. BIOLOGICAL TRACE ELEMENT RESEARCH, 2017, 176 (02) : 401 - 406
  • [10] Effects of semduramicin on performance and carcass traits of feedlot steers
    Almeida, R.
    Silva, S. L.
    Souza, R. T. Y. B.
    Lanna, D. P. D.
    Leme, P. R.
    [J]. JOURNAL OF DAIRY SCIENCE, 2004, 87 : 42 - 42