Effect of sheep diets with macadamia by-product and protected fat on the quality of fresh and frozen semen

Authors

  • D. B. Pereira Instituto de Zootecnia/Apta/SAA-SP
  • A. T. Geraldo Laboratório de Melhoramento Genético e Reprodução Animal, Universidade Estadual do Norte Fluminense (UENF). Campos dos Goytacazes, RJ, Brazil
  • C. M. G. David Laboratório de Melhoramento Genético e Reprodução Animal, Universidade Estadual do Norte Fluminense (UENF). Campos dos Goytacazes, RJ, Brazil
  • C. R. Quirino Laboratório de Melhoramento Genético e Reprodução Animal, Universidade Estadual do Norte Fluminense (UENF). Campos dos Goytacazes, RJ, Brazil
  • F. P. Campos Instituto de Zootecnia/Apta/SAA-SP
  • C. H. C. Viana Faculdade de Medicina Veterinária, Pontifícia Universidade Católica de Minas Gerais (PUC). Poços de Caldas, MG, Brazil
  • M. Nichi Departamento de Reprodução Animal, Faculdade de Medicina Veterinária, Universidade de São Paulo (USP). São Paulo, SP, Brazil
  • G. A. E. Parren Instituto de Zootecnia/Apta/SAA-SP
  • A. R. Bozzi Instituto de Zootecnia/Apta/SAA-SP
  • R. T. Beltrame Centro Universitário do Espírito Santo (UNESC). Colatina, ES, Brazil
  • R. L. D. Costa Instituto de Zootecnia - Nova Odessa https://orcid.org/0000-0001-8888-6915

DOI:

https://doi.org/10.17523/bia.2019.v76.e1444

Keywords:

fatty acids, Macadamia spp., sheep, calcium salts, seminal biotechnology

Abstract

The objective was to evaluate the seminal quality of Morada Nova sheep consuming diets supplemented with macadamia residue and protected fat. The experiment was carried out with 24 rams aged 18 or 30 months, distributed in four treatment groups: control (C), 50 g (MAC50) or 150 g (MAC150) of macadamia industrial by-product; and 50 g of protected fat (Megalac®), added to the concentrate. Semen was collected at four intervals: before supplementation (day 0), 30, 60 and 75 days after the beginning of supplementation. Semen was collected to measure volume, appearance, motility, vigour, swirling, concentration and morphology. At days 60 and 75, semen was frozen for determination of plasma membrane integrity, acrosome integrity and mitochondrial activity after thawing. Analysis of variance was performed and the means were compared by the SNK test. In the analysis of fresh semen, a significant effect (p < 0.05) of the treatments on motility was observed. For cryopreserved semen, there was no difference (p > 0.05). The inclusion of 50 or 150 g of macadamia residue or 50 g of Megalac in the diet does not alter the quantitative and qualitative aspects of fresh and post-thawed semen.

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Published

2019-08-01

Issue

Section

ANIMAL REPRODUCTION

How to Cite

Effect of sheep diets with macadamia by-product and protected fat on the quality of fresh and frozen semen. (2019). Bulletin of Animal Husbandry, 76, 1-12. https://doi.org/10.17523/bia.2019.v76.e1444

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