Dynamics of testosterone concentration in male steppe lemmings (Lagurus lagurus) in the reproductive cycle reflects the species-specific mating system

• Published in: Doklady. Biological sciences Vol. 468; no. 1; pp. 146 - 148
• Main Authors: Potapova, O. F., Potapov, M. A., Kondratyuk, E. Yu, Evsikov, V. I.
• Format: Journal Article
• Language: English
• Published: Moscow Pleiades Publishing 01-05-2016; Springer Nature B.V
• Subjects: Animals; Arvicolinae - blood; Biomedical and Life Sciences; Evolutionary Biology; General Biology; Lagurus; Life Sciences; Male; Plant Sciences; Reproduction - physiology; Testosterone - blood
• ISSN: 0012-4966; 1608-3105
• DOI: 10.1134/S0012496616030145

In the blood of male steppe lemmings, relatively low background levels of testosterone were detected, this is characteristic of a monogamous species. A significant increase in testosterone level, more expressed in sexually active males, was observed at the initial stage of formation of reproductive couples. Apparently, in the future, the couple will exist in a stable relationship, and, hence, the maintenance of a high testosterone level becomes excessive. The decrease in, and the relative “normalization” of, the hormone level during the existence of the pair, including raising of the young, promotes higher expression of the male paternal care of the offspring at the species level.