African Journal of
Biotechnology

  • Abbreviation: Afr. J. Biotechnol.
  • Language: English
  • ISSN: 1684-5315
  • DOI: 10.5897/AJB
  • Start Year: 2002
  • Published Articles: 12294

Full Length Research Paper

Concentration of fecal corticosterone metabolites in dominant versus subordinate buffalo heifers

Aparecida F. Madella-Oliveira
  • Aparecida F. Madella-Oliveira
  • Instituto Federal do Espírito Santo – Campus de Alegre – ES, Brazil.
  • Google Scholar
Celia R. Quirino*
  • Celia R. Quirino*
  • Laboratório de Reprodução e Melhoramento Genético Animal, CCTA, Universidade Estadual do Norte Fluminense Darcy Ribeiro-RJ, Brazil.
  • Google Scholar
Aline Pacheco
  • Aline Pacheco
  • Laboratório de Reprodução e Melhoramento Genético Animal, CCTA, Universidade Estadual do Norte Fluminense Darcy Ribeiro-RJ, Brazil.
  • Google Scholar
Ricardo L. D. da Costa
  • Ricardo L. D. da Costa
  • Instituto de Zootencia, da Agência Paulista de Tecnologia dos Agronegócios, Rua Heitor Penteado, 56, Nova Odessa, São Paulo, Brazil.
  • Google Scholar
Renato T. Beltrame
  • Renato T. Beltrame
  • Centro Universitário do Espírito Santo-UNESC; Av. Fioravante Rossi, 2930, Colatina, ES, Brazil.
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Weliton M. Costa
  • Weliton M. Costa
  • Graduate Student of Instituto Federal do Espírito Santo – Campus de Alegre – ES, Brazil.
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Cláudio A. de Oliveira
  • Cláudio A. de Oliveira
  • Hormone Dose Lab of Universidade de São Paulo- SP, Brazil.
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Priscila V. Furtado
  • Priscila V. Furtado
  • Hormone Dose Lab of Universidade de São Paulo- SP, Brazil.
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  •  Received: 12 September 2013
  •  Accepted: 26 February 2014
  •  Published: 16 April 2014

Abstract

The objective of this work was to evaluate the concentration of fecal metabolites of corticosterone and to verify if there are differences between dominant and subordinate heifers. The feces of 18 buffalo heifers were collected in the estrous period, to quantify the corticosterone concentrations. The heifers were separated into three groups (G1, G2 and G3) and synchronized. The observations of the social and sexual behaviors were recorded and, from these results, the sociometric matrix was constructed to establish the social index and determine the hierarchic positions of the buffalo heifers as low, moderate and high. The fecal concentrations of corticosterone were higher in animals with high hierarchic position on day zero and describe alterations in the dominant females before synchronization, suggesting that there is an energy cost for the females in the highest position to be able to maintain their dominance status.

 

Key words: Estrus, hormones, social status, non-invasive technique.