<b>Influence of availability of shade on testicular characteristics of Santa Ines rams</b> - doi: 10.4025/actascianimsci.v35i.18479

  • Sônia Martins Teodoro Universidade Estadual do Sudoeste da Bahia
  • Alfredo Manuel Franco Pereira Universidade de Évora
  • José Dantas Gusmão Filho Instituto Federal da Bahia
  • Jadir Nogueira da Silva Universidade Federal de Viçosa
Keywords: semen, biometrics, sheep, shade, thermal stress

Abstract

The purpose of this study was to evaluate the effects of availability of artificial shading on testicular and seminal characteristics of Santa Ines crossbred rams. Twelve 8 month old rams at 38.1 ± 5.2 kg average weight, were used in a total random design with two treatments: areas with and without available artificial shading (black polyethylene mesh screen for a 50% reduction of solar radiation). The scrotal circumference, scrotal length, scrotal volume, rectal temperature and scrotal temperature were measured twice a week. Also a biweekly analysis of the semen was carried out, measuring the volume and spermatic concentration as well as the percentage of normal spermatozoa. The results show that available shading provided for lower scrotal temperatures and higher sperm concentration, without influencing the scrotal volume and the percentage of normal spermatozoa. The testicular measures, such as the scrotal circumference and length were higher in the rams that were subjected to the no available shading treatment. The absence of differences, in some of the analyzed variables, between the two treatments, with and without available shading, could be due to high adaptability of the animals.

 


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Author Biographies

Sônia Martins Teodoro, Universidade Estadual do Sudoeste da Bahia

Universidade Estadual do Sudoeste da BAHIA – UESB; Departamento de estudos básicos e  Isntrumentais – DEBI; Centro de Estudos Bioclimáticos – CEBIO; Campus Juvino Oliveira, Itapetinga – Bahia.

Alfredo Manuel Franco Pereira, Universidade de Évora
Zootecnic Department, University of Évora, Apartado 94, CP 7000-554. Évora – Portugal (351)266760800
José Dantas Gusmão Filho, Instituto Federal da Bahia
Federal Institute of Bahia – Av. David Jonas Fadini, s/n. Rosa Neto. CP 45820-970 - Eunápolis, Bahia – Brazil (55) 7332812266
Jadir Nogueira da Silva, Universidade Federal de Viçosa
UFV – Depto. Engenharia Agrícola. Campus Universitário – Viçosa, MG – 36570-000 – Telefone (31) 3899-1928 – Fax (31) 3899-2735
Published
2013-05-27
How to Cite
Teodoro, S. M., Pereira, A. M. F., Gusmão Filho, J. D., & Silva, J. N. da. (2013). <b>Influence of availability of shade on testicular characteristics of Santa Ines rams</b&gt; - doi: 10.4025/actascianimsci.v35i.18479. Acta Scientiarum. Animal Sciences, 35(4), 441-446. https://doi.org/10.4025/actascianimsci.v35i4.18479
Section
Animal Breeding and Reproduction

0.9
2019CiteScore
 
 
29th percentile
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