Analysis of Annual Changes in the Concentrations of Selected Macro- and Microelements, Thyroxine, and Testosterone in the Serum of Red Deer (Cervus elaphus) Stags

• Published in: Biological trace element research Vol. 168; no. 2; pp. 356 - 361
• Main Authors: Kuba, J, Błaszczyk, B, Stankiewicz, T, Skuratko, A, Udała, J
• Format: Journal Article
• Language: English
• Published: New York Springer US 01.12.2015; Springer Nature B.V
• Subjects: adults; Air temperature; Animals; Antlers - growth & development; autumn; Biochemistry; Biomedical and Life Sciences; Biotechnology; blood serum; Calcium; Calcium - blood; Cervus elaphus; Circadian Rhythm; Deer; Deer - blood; Elements; Hormones; Life Sciences; Magnesium; Magnesium - blood; Male; mating season; metabolism; Minerals; Nutrition; Oncology; phosphorus; Phosphorus - blood; seasonal variation; Seasons; secretion; Selenium; Selenium - blood; Sexual Behavior, Animal; Spring; stags; Temperature; Testosterone; Testosterone - blood; Thyroid gland; thyroxine; Thyroxine - blood; Trace elements; Testosterone; Red deer; Minerals; Stags; Thyroxine; Seasonality
• ISSN: 0163-4984; 1559-0720
• DOI: 10.1007/s12011-015-0368-6

The aim of the study was to analyze seasonal changes in the concentrations of calcium, phosphorus, magnesium, and selenium as well as thyroxine and testosterone in adult red deer stags. The highest testosterone concentrations (mean 6.29 ± 4.36 ng/ml) were observed from the end of August to November, confirming an increase in testicular secretory activity during the mating season. The changes in thyroxine concentration show circannual rhythms, most likely related to changes in the air temperature. The highest mean level of thyroxine was observed in spring (55.69 ± 10.99 ng/ml). The concentration of selenium also reached the highest level during this season (0.107 ± 0.027 μg/ml). In the case of the studied macroelements, the concentrations were stable from spring to summer but then decreased to the lowest mean values in autumn in both years of the experiment (Ca, 61.17 ± 10.60; P, 47.08 ± 9.59; Mg, 15.96 ± 2.39 μg/ml). The dynamics of thyroxine secretion does not seem to affect directly the metabolism of calcium, phosphorus, and magnesium. In turn, sexual activity, manifested in the increase in secretion of testosterone, may affect changes in the concentration of calcium. Additionally, we cannot exclude a connection between changes in the concentrations of testosterone and selenium.