A comparison of voluntary intake and in vivo digestion in guanacos (Lama guanicoe) and sheep given fresh grass

Mariecia Fraser, D. H. Baker

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8 Citations (SciVal)

Abstract

An experiment was conducted to compare the voluntary intake and in vivo digestion for guanacos and sheep when offered perennial ryegrass at three different growth stages: vegetative growth (VG), emerging inflorescence (EI) and mature inflorescence (MI). Dry-matter (DM) intake ranged from 1.19 to 2.12 kg/day for the guanacos and 0.79 to 1.52 kg/day for the sheep. When expressed on a metabolic live-weight (M 0.75) basis, the intake of the guanacos (55.8, 43.1 and 44.1 g DM per kg M 0.75 daily on the VG, EI and MI grasses respectively) and the sheep (54.4, 45.7 and 47.4 g DM per kg M 0.75 daily respectively) were similar (s.e.d. = 3.70). Apparent digestibilities of all food constituents were also similar. In terms of food choice, the response of the two species to grass stem differed; the guanacos selected (EI) or tolerated (MI) this fraction, while the sheep tolerated (EI) or avoided (MI) it.

Original languageEnglish
Pages (from-to)567-572
Number of pages6
JournalAnimal Science
Volume67
Issue number3
DOIs
Publication statusPublished - Dec 1998

Keywords

  • Camelidae
  • Digestibility
  • Food preferences
  • Lolium
  • Sheep

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