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, Liliana León-Altamirano, Joaquín Herrera-Muñoz, Isaías Salgado-Ugarte, Enrique Mendieta-Marquéz, J. L. Contreras-Montiel, Héctor F. Serrano, José Ramírez-Pulido, Arturo Salame-Mendez

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. 


Palabras clave


Denso-dependency; testosterone; Peromyscus melanotis; testes; reproduction; rodents

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DOI: https://doi.org/10.21829/azm.2012.283856

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Copyright (c) 2012 ACTA ZOOLÓGICA MEXICANA (N.S.)

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Este obra está bajo una licencia de Creative Commons Reconocimiento-NoComercial-CompartirIgual 4.0 Internacional.

Acta Zoológica Mexicana (nueva serie), 2020, Vol. 36, es una publicación electrónica continua de acceso abierto, editada por el Instituto de Ecología, A.C. (INECOL), Carretera antigua a Coatepec 351, Col. El Haya, Xalapa, Ver. C.P. 91073, Tel. (228) 842-1800, extensión 4112 http://azm.ojs.inecol.mx/index.php/azm. Editor responsable: Sergio Ibáñez-Bernal, sergio.ibanez@inecol.mx. Reservas de Derechos al Uso Exclusivo No. 04-2019-021314325500-203, versión on-line ISSN 2448-8445, [antes también impresa ISSN 0065-1737], con registros otorgados por el Instituto Nacional del Derecho de Autor. Responsable de la última actualización de este volumen, Sergio Ibáñez-Bernal, Carretera antigua a Coatepec, 351, Col. El Haya, Xalapa, Ver., C.P. 91073. Fecha de la última modificación: 09 de enero de 2020.

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