Vol. 28 Núm. 3 (2012)
Artículos

Is there a difference between testosterone contents in two populations of the Black Eared Mouse, living under similar conditions but with differences in population patterns?

Alondra Castro-Campillo
Departamento de Biología
Liliana León-Altamirano
Departamento de Biología de la Reproducción
Joaquín Herrera-Muñoz
Departamento de Ciencias de la Salud. División de Ciencias Biológicas y de la Salud. Universidad Autónoma Metropolitana, Unidad Iztapalapa. Apdo. Postal 55-535. Av. San Rafael Atlixco # 186. Col. Vicentina. Iztapalapa, CP 09340. México, D. F., México.
Isaías Salgado-Ugarte
Departamento de Biología
Enrique Mendieta-Marquéz
Departamento de Ciencias de la Salud. División de Ciencias Biológicas y de la Salud. Universidad Autónoma Metropolitana, Unidad Iztapalapa. Apdo. Postal 55-535. Av. San Rafael Atlixco # 186. Col. Vicentina. Iztapalapa, CP 09340. México, D. F., México.
J. L. Contreras-Montiel
Departamento de Biología de la Reproducción
Héctor F. Serrano
Departamento de Ciencias de la Salud. División de Ciencias Biológicas y de la Salud. Universidad Autónoma Metropolitana, Unidad Iztapalapa. Apdo. Postal 55-535. Av. San Rafael Atlixco # 186. Col. Vicentina. Iztapalapa, CP 09340. México, D. F., México.
José Ramírez-Pulido
Departamento de Biología
Arturo Salame-Mendez
Departamento de Biología de la Reproducción

Publicado 2012-12-05

Palabras clave

  • Denso-dependency,
  • testosterone,
  • Peromyscus melanotis,
  • testes,
  • reproduction,
  • rodents
  • ...Más
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Cómo citar

Castro-Campillo, A., León-Altamirano, L., Herrera-Muñoz, J., Salgado-Ugarte, I., Mendieta-Marquéz, E., Contreras-Montiel, J. L., Serrano, H. F., Ramírez-Pulido, J., & Salame-Mendez, A. (2012). Is there a difference between testosterone contents in two populations of the Black Eared Mouse, living under similar conditions but with differences in population patterns?. ACTA ZOOLÓGICA MEXICANA (N.S.), 28(3). https://doi.org/10.21829/azm.2012.283856

Resumen

In order to answer this question, we compare intragonadal contents of testosterone (T) in males of two neighboring populations of Peromyscus melanotis J. A. Allen and Chapman, 1897, that differ
in their population density and in its seasonal fluctuations, even though they inhabit in quite similar habitat conditions. Although an affirmative answer to this question would corroborate the idea that this androgen has a density-dependent effect, since it has been proposed that T increases at low densities and vice versa, our results did not confirm this thesis: T showed no differences between the two populations, since both had the same seasonal pattern for the androgen, throughout four years of study, with a maximum in the summer, as would be expected in this temperate species whose reproductive optimum occurs at that time of the year. Therefore, density differences between both populations must be rather due to subtle microhabitat differences.