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Journal of Animal Science Abstract - Animal Production

Effects of supplementation during late gestation on goat performance and behavior under rangeland conditions

 

This article in JAS

  1. Vol. 93 No. 8, p. 4153-4160
     
    Received: Oct 13, 2014
    Accepted: May 27, 2015
    Published: July 24, 2015


    1 Corresponding author(s): velizderas@yahoo.com
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doi:10.2527/jas.2014-8609
  1. J. R. Luna-Orozco*,
  2. C. A. Meza-Herrera,
  3. V. Contreras-Villarreal,
  4. N. Hernández-Macías,
  5. O. Angel-Garcia,
  6. E. Carrillo§,
  7. M. Mellado and
  8. F. G. Véliz-Deras 1
  1. * Centro de Bachillerato Tecnológico Agropecuario No. 1, Torreón, Coahuila, México. 27000
     Universidad Autónoma Chapingo, Unidad Regional Universitaria de Zonas Áridas. Bermejillo, Durango, México. 35230
     Universidad Autónoma Agraria Antonio Narro. Torreón, Coahuila, México. 27054
    § Instituto Tecnológico de Torreón, Torreón, Coahuila, México. 27170

Abstract

This study evaluated the effects of peripartum feed supplementation on doe and kid BW and BCS, milk yield and composition, serum metabolites, and maternal–neonatal behavior under rangeland conditions in northern Mexico. Adult does (n = 23) were randomly assigned to 3 nutritional plane groups: 1) goats supplemented (500 g of concentrate [18% CP/kg DM, 2.7 Mcal/kg DM, and 2% salt]) from 15 d prepartum to 7 d postpartum (G15; n = 8), 2) the same supplementation as G15 but from 35 d before until 7 d after kidding (G35; n = 8), and 3) nonsupplemented does (GC; n = 7). Supplemented goats differed from GC goats in BW (48 ± 1.8, 46.1 ± 2.5, and 44.9 ± 2.3 kg; P < 0.05), milk yield (1.8 ± 0.1, 1.9 ± 0.2, and 1.2 ± 0.1 kg at d 15 postpartum; P < 0.01), kid birth weights (3.8 ± 0.2, 3.6 ± 0.2, and 3.4 ± 0.2 kg; P < 0.05), and kid BW at 15 d after birth (6.9 ± 0.2, 6.6 ± 0.2, and 5.6 ± 0.2 kg; P < 0.05) for the G35, G15, and GC, respectively. Serum concentrations for total protein, glucose, and cholesterol were not affected (P > 0.05) by treatments. Milk of GC goats showed increased (P < 0.05) percentages for fat, protein, lactose, and nonfat milk solids, whereas total quantities of these variables where higher (P < 0.05) in the G15 and G35 groups. Furthermore, GC dams spent more time seeking their offspring and emitted more low-pitched bleats 4 h postpartum (P < 0.05) in a 2-choice test compared with the G15 and G35 groups. In general, peripartum supplementation promoted a closer dam–kid relationship at 8 h postpartum. Goat performance may be improved in this semiarid region of Mexico with marginal production through supplementation in late gestation.

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