Serial clinical, colpo-cytological and endocrinological evaluations of Cerdocyon thous bitches from the Rio de Janeiro zoo

Authors

  • Rafael Veríssimo Monteiro Jardim Zoológico, Rio de Janeiro, RJ
  • Márcio Ricardo Costa dos Santos Universidade Federal Fluminense, Faculdade de Veterinária, Rio de Janeiro, RJ
  • Eduardo Borges Vianna Universidade Federal Fluminense, Faculdade de Veterinária, Rio de Janeiro, RJ
  • Tatiana Cardoso Soares de Araújo Universidade Federal Fluminense, Faculdade de Veterinária, Rio de Janeiro, RJ
  • Carlos Eduardo Verona Universidade Estadual do Norte Fluminense, Rio de Janeiro, RJ
  • Luís Paulo Luzes Fedullo Jardim Zoológico, Rio de Janeiro, RJ

DOI:

https://doi.org/10.1590/S1413-95962002000200007

Keywords:

Canidae, Cytology, Endocrinology, Reproduction

Abstract

Serial clinical, colpo-cytological and endocrinological examinations of two five-year-old females of the crab-eating dog (Cerdocyon thous), from the RIOZOO Foundation in the State of Rio de Janeiro - Brazil, were carried out over a 10-month period. Clinically healthy animals were kept in sand substratum enclosures, located 500m apart from each other. They were each housed with two males. The colpo-cytological technique employed for Cerdocyon thous used methods similar to those developed for domestic bitches. Unlike domestic dogs, blood cells were absent in all phases of the estrus cycle, including the pro-estrus phase. Differentiation of each type of vaginal cells during the estrus cycle phases in this species follows the same patterns shown by domestic bitches. The estradiol and progesterone levels were similar to those occurring in domestic bitches. The progesterone levels reach their maximum (46 ng/ml) around the 10th day of pregnancy. The estradiol analysis demonstrated that, although levels of this hormone could be high at various times throughout the year, mating actually occurs in late winter and in spring. It was impossible to evaluate whether males and females kept in close proximity throughout the entire year would stimulate the production of estradiol, resulting in what would be considered a captivity artifice.

Downloads

Download data is not yet available.

Downloads

Published

2002-01-01

Issue

Section

UNDEFINIED

How to Cite

1.
Monteiro RV, Santos MRC dos, Vianna EB, Araújo TCS de, Verona CE, Fedullo LPL. Serial clinical, colpo-cytological and endocrinological evaluations of Cerdocyon thous bitches from the Rio de Janeiro zoo. Braz. J. Vet. Res. Anim. Sci. [Internet]. 2002 Jan. 1 [cited 2024 Apr. 22];39(2):93-6. Available from: https://www.revistas.usp.br/bjvras/article/view/5987