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International Journal of Zoological Research
  Year: 2020 | Volume: 16 | Issue: 2 | Page No.: 69-78
DOI: 10.3923/ijzr.2020.69.78
 
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Ecophysiological Relationships of Environment and Reproduction in Males of Rock Mouse (Peromyscus difficilis felipensis) at a Temperate Forest

Arturo Salame-Méndez , Alondra Castro-Campillo, Jonathan Escobar-Flores, Jesús Vergara-Huerta, Héctor Serrano, Dolores García-Suárez, Jorge Haro-Castellanos, Noé González-Ruiz and José Ramírez-Pulido

Abstract:
Background and Objective: The ecophysiological relationship between reproductive parameters and environmental variables is mostly unknown in wild temperate species of small rodents, inhabiting mid-latitude, temperate forests. Here the goal was the relationship between testicular function, testes and body weight to seasonal variations of daylight length and temperature in adult males of the Rock Mouse (Peromyscus difficilis felipensis), in a two-year study. Materials and Methods: Spermatogenesis, spermatogenic function, content and production of testosterone and body and testicular weight were monthly evaluated in free-living P. d. felipensis, using standard, histological and biochemical (ELISA) techniques. Results: Although the presence of sperm in both testes and epididymis was found all year round, there was a seasonal pattern with a spring peak in testis volume and testosterone content and production; though, the testicular function was maintained until fall and winter. Conversely, bodyweight decreased during spring-summer, while it increased in fall-winter. There was an ecophysiological positive correlation of reproductive parameters with environmental gathered data, especially with daylight length (i.e., increased correlation during spring, p<0.001) and there was a slight or no participation of environmental temperature. Conclusion: In addition to daylight length, the seasonal pattern of testicular function in these temperate populations of mice, indicates that other environmental factors, waiting to be elucidated (e.g., phytochemicals intake through food), also contribute to its regulation.
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How to cite this article:

Arturo Salame-Méndez, Alondra Castro-Campillo, Jonathan Escobar-Flores, Jesús Vergara-Huerta, Héctor Serrano, Dolores García-Suárez, Jorge Haro-Castellanos, Noé González-Ruiz and José Ramírez-Pulido, 2020. Ecophysiological Relationships of Environment and Reproduction in Males of Rock Mouse (Peromyscus difficilis felipensis) at a Temperate Forest. International Journal of Zoological Research, 16: 69-78.

DOI: 10.3923/ijzr.2020.69.78

URL: https://scialert.net/abstract/?doi=ijzr.2020.69.78

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