Tropical Animal Health and Production

, Volume 50, Issue 1, pp 217–221 | Cite as

Biochemical and hormonal parameters of lambs using guava (Psidium guajava L.) agro-industrial waste in the diet

  • Roberto G. CostaEmail author
  • Neila L. Ribeiro
  • Priscila T. Nobre
  • Francisco F. R. Carvalho
  • Ariosvaldo N. Medeiros
  • George R. B. Cruz
  • Luís F. S. Freire
Short Communications


The objective of this research was to evaluate the biochemical and hormonal parameters of Santa Inês sheep that received diets with different levels of guava agro-industrial waste (GAW). Forty non-castrated male animals of the Santa Inês breed were used, with an average initial weight of 21.3 ± 2.6 kg, and an average age of 120 days. The animals were distributed in a completely randomized design, with five treatments and eight replicates, and fed with increasing GAW levels replacing hay (0.0, 7.5, 15.0, 22.5 and 30.0%). After the beginning of the diet period, blood samples were collected every 2 weeks approximately 3 h after feeding. Cholesterol concentration had a significant effect (P < 0.01) with the inclusion of GAW. The animals that ingested the control diet had the highest concentrations of cholesterol. T3 and T4 hormones showed a significant difference (P < 0.01) among the treatments, i.e. the animals that ingested the control diet had the lowest concentrations of these hormones. We concluded that the inclusion of GAW in up to 30% decreases the concentration of cholesterol and increases the concentrations of T3 and T4 in the blood, aiding the metabolism of the animals.


By-product Cholesterol Cortisol Sheep T3 T4 



The authors would like to thank CAPES (Coordination for Improvement of Higher Level Personnel) for financing the project and the Federal University of Paraíba—Brazil (UFPB).

Compliance with ethical standards

Conflict of interest

The authors declare that they have no conflict of interest.


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Copyright information

© Springer Science+Business Media B.V. 2017

Authors and Affiliations

  • Roberto G. Costa
    • 1
    Email author
  • Neila L. Ribeiro
    • 1
  • Priscila T. Nobre
    • 2
  • Francisco F. R. Carvalho
    • 3
  • Ariosvaldo N. Medeiros
    • 2
  • George R. B. Cruz
    • 1
  • Luís F. S. Freire
    • 1
  1. 1.Departamento de Ciência AnimalUniversidade Federal da ParaibaBananeirasBrazil
  2. 2.Departamento de ZootecniaUniversidade Federal da ParaibaAreiaBrazil
  3. 3.Departamento de ZootecniaUniversidade Federal Rural de PernambucoRecifeBrazil

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