doi: 10.15389/agrobiology.2014.2.59eng

UDC 636.2:636.018:577.175.622:577.171.5

CONCENTRATION OF TESTOSTERONE AND CHOLESTEROL IN BLOOD SERUM OF SERVICING BULLS DEPENDING ON THEIR TYPE OF PRODUCTIVITY, AGE AND THE SEASON

Kh.A. Amerkhanov1, A.I. Abilov2, G.V. Eskin3, N.A. Kombarova3, I.S. Turbina3, E.V. Fedorova3, M.V. Varennikov2, I.V. Gusev2

1Ministry of Agriculture of the Russian Federation,
1/11, Orlikov per., Moscow, 107139 Russia;
2All-Russian Research Institute of Animal Husbandry, Russian Academy of Agricultural Sciences,
pos. Dubrovitsy, Podolsk Region, Moscow Province, 142132 Russia,
e-mail: farida.abilova@yandex.ru;
3Head Center for Farm Animal Reproduction, Plc.,
3, ul. Central'naya, pos. Bykovo, Podolsk Region, Moscow Province, 142143 Russia,
e-mail: csio-secr@yandex.ru, komnina@list.ru, oaohcr@mail.ru, Fedorova_oaohcr@mail.ru

Received July 25, 2013

 

The androgenic hormones are known to control sexualization during prenatal period and to keep up the sex-influenced traits in adult servicing bulls. In particular, the hormones determine functions of testes, prostate, android glands, semen quality, affect the DNA replication, transcription, translation, cell division, they are also involved in immune activity, etc. In turn, production of the androgens is influenced by both internal factors (i.e. genotype, precursors), and external conditions, such as feeding and the season of the year. In our examination conducted in 2012 to 2013, the servicing bulls (n = 49) up to 30 month old and the older which are used in breeding for milk and meet productivity were tested at different seasons (spring, summer and autumn) to compared the testosterone and cholesterol concentrations in blood serum. In all tested animals an initial content of the hormone and its precursor in blood serum was within the physiological limits. It was shown that the higher cholesterol content, the higher testosterone concentration was tested (Р < 0.01). Testosterone production depended on the age and breed of bulls, and also on the season. In meat bulls the concentration of blood serum testosterone was higher if compared to that in milk bulls, 18.12±5.13 and 16.36±5.15 mmol/l, respectively. According to the data obtained the endogenous testosterone content is not influenced by red-factor in Holsteins.

Keywords: testosterone, cholesterol, servicing bulls.

 

Full article (Rus)

 

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