Efeitos de diferentes estratégias de restrição alimentar sobre as concentrações de hormônios, metabólitos e minerais de machos Holandês × Zebu não castrados em terminação

Translated title of the contribution: Effect of restricted-feeding strategies on blood concentrations of hormones, metabolites, and minerals in Holstein × Zebu finishing steers

Flávia Adriane de Sales Silva, Sebastião de Campos Valadares Filho, Luciana Navajas Rennó, Nathalia Veloso Trópia, Caio William Magalhães Souza, Herlon Meneguelli Alhadas, Erica Garcia Mafort, Tara Louise Felix

Research output: Contribution to journalArticlepeer-review

Abstract

The objectives were to determine the effects of restricted-feeding strategies on blood concentrations of hormones, metabolites, and minerals in Holstein × Zebu finishing steers. Twenty steers (body weight = 319 ± 16.2 kg; age = 19 ± 1 months) were randomly allotted in 4 groups of 5 steers, which were restricted to 85% ad libitum feed intake for either 0 (R0; n = 5), 28 (R28; n = 5), 42 (R42; n = 5) or 84 (R84; n = 5) days of an 84-d finishing period. Steers were individually housed and considered the experimental unit. Blood samples were collected on d 0, 21, 42, 63, and 84, and were assayed for insulin-like growth factor 1 (IGF-1), thyroid hormones (T3 and T4), albumin, creatinine, urea, total protein, glucose, triglycerides, calcium, and phosphorus. Steers had increasing IGF-1 concentrations until d 42 when restricted-fed. Steers fed R84 had the greatest IGF-1 concentrations on d 84. Urea concentrations were greatest in steers fed R0 and least in steers fed R28; steers fed R42 and R84 were intermediate and not different from one another. Concentrations of IGF-1, urea, albumin, and calcium, but not T3, T4, glucose, triglycerides, creatinine, total protein, and phosphorus were affected by restricted-feeding strategies in Holstein × Zebu finishing steers.

Translated title of the contributionEffect of restricted-feeding strategies on blood concentrations of hormones, metabolites, and minerals in Holstein × Zebu finishing steers
Original languagePortuguese
Article numbere-63329
JournalCiencia Animal Brasileira
Volume21
DOIs
StatePublished - 2020

All Science Journal Classification (ASJC) codes

  • Animal Science and Zoology
  • veterinary(all)

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