Seasonal changes in gonadal-thyroid functions in the adult male Sundevall’s jird (Meriones crassus) (Rodentia: Muridae, 1842)


  • Radia Boufermes Biochemistry Department, Faculty of Sciences, BADJI Mokhtar University, Annaba, Algeria
  • Zaina Amirat Arid Lands Research Laboratory, Department of Population and Organisms Biology, Faculty of Biology, LRZA Houari Boumediene University of Sciences and Technology (USTHB), Algiers 16111, Algeria;
  • Farida Khammar Department of Population and Organisms Biology, Faculty of Biology,LRZA. Houari Boumediene University of Sciences and Technology (USTHB), Algiers 16111, Algeria;



Sundevall's Jird, Seasonal variations, Plasma testosterone, Plasma T3 and T4


Thyroid hormones play an important role in all tissues of the body, including gonadal function. In Sundevall’s jird, Meriones crassus (Rodentia, Gerbillinea), caught in its natural biotope in Algerian Sahara desert, the testis activity was evaluated by testicular and seminal vesicles weights and plasma testosterone level. The thyroid activity was evaluated by plasma concentrations of total triiodothyronine (T3) and thyroxin (T4) using radioimmunoassay (RIA) method. The testis activity is characterized by a maximum in spring, a regression during summer, a minimum in autumn and a lower activity in winter. The plasma concentrations of total T3 and T4 varied non-significantly during the seasons. However, thyroid activity varied in contrast to testicular structure especially during the breeding season when the testis activity is maximum. In order to specify the implication of thyroid function in testis seasonal variations, we investigated the relationship between both activities. This study could further explain the seasonal regulation of testicular function in relation to the environment cues in this jird.


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How to Cite

Boufermes, R., Amirat, . Z. ., & Khammar, F. . (2022). Seasonal changes in gonadal-thyroid functions in the adult male Sundevall’s jird (Meriones crassus) (Rodentia: Muridae, 1842). Journal of Wildlife and Biodiversity, 6(2), 74–86.