Effects of two space allowances on cortisol levels, agonistic behavior and their relationship with the ovarian cycle of the collared peccary (Pecari tajacu) in captivity

  • Ruben Cornelio Montes-Perez
  • Lourdes Kuri Melo Dirección de Servicios y Certificación Pecuaria. Secretaría de Agricultura, Ganadería, Desarrollo Rural, Pesca y Alimentación
  • José Mukul Yerves Campus de Ciencias Biológicas y Agropecuarias. Universidad Autónoma de Yucatán
  • José C. Segura-Correa Campus de Ciencias Biológicas y Agropecuarias. Universidad Autónoma de Yucatán
  • Fernando G. Centurión Castro Campus de Ciencias Biológicas y Agropecuarias. Universidad Autónoma de Yucatán

Abstract

Two groups, each of seven mature females and one vasectomized male, of collared peccaries (Pecari tajacu) in captivity were used to compare two treatments based on either 5 and 20 m2/animal. Blood plasma levels of cortisol and progesterone were measured by radioimmunoassay. Variations in plasma concentration of progesterones were used to detect stages of ovarian cyclicity. Sexual and agonistic behaviors were measured by the scan sampling method. Results obtained with the 5 and 20 m2/animal treatments were: concentration of cortisol, 7.86 to 11.85 and 7.76 to 12.10 μg/dl; duration of the estrous cycle was 28.5 + 9.5 and 24.6 + 3.4 d, respectively, with no differences between treatments (P < 0.05). The corresponding values for proportion of sexual behavior were 2.40 and 2.19% those for agnostic behavior were 1.54 and 2.10%, the latter difference being significant (P > 0.05). It is concluded that mixed groups of collared peccaries with one sole male can be submitted to a housing density of 5 m2/animal without affecting the blood level of cortisol, the agonistic behavior or the cyclical ovarian activity.

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Author Biography

Ruben Cornelio Montes-Perez
Departamento de Reproduccion. Facultad de Medicina Veterinaria y Zootecnia. Universidad Autónoma de Yucatán
Published
2012-03-06
How to Cite
Montes-Perez, Ruben Cornelio, Lourdes Kuri Melo, José Mukul Yerves, José C. Segura-Correa, and Fernando G. Centurión Castro. 2012. “Effects of Two Space Allowances on Cortisol Levels, Agonistic Behavior and Their Relationship With the Ovarian Cycle of the Collared Peccary (Pecari Tajacu) in Captivity”. Latin American Archives of Animal Production 20 (3-4). https://ojs.alpa.uy/index.php/ojs_files/article/view/1135.
Section
Original paper