Authors: V. I. KOSILOV, doctor of agricultural sciences, professor, Orenburg State Agrarian University (18 Chelyuskintsev str., 460014, Orenburg; phone: 8 919 840-23-01; e-mail:
Keywords: sheep, breed, Finnish Landrace, Pamir fine-wool, temperature.
Abstract: The article presents data showing changes in the physiological functions of Finnish Landrace sheep imported from Estonia compared to the Pamir fine-wool group of sheep. It was found that the Finnish bright increases the overall level of metabo- lism in the daytime at high temperature (average 33–35 °C), solar radiation and relative humidity (53–48 %) compared with the morning (20,1–25,3 °C). The body temperature in the daytime in young Pamir fine-wool breed reaches the upper limit of the norm, and the analogs of the breed Finnish Landrace even higher than normal. Respiratory rate is 5 times higher than in the morning. At high external temperature and intense radiation in the bright Pamir fine-wool breed respiration rate increases more than twice, body temperature increases by 1,3 and 1,1 °C. The overall level of metabolism and oxidation processes in sheep Pamir fine-wool breed higher. The depth of the character and type of respiration of sheep of the Pamir fine-wool breed decreases at a lower frequency and volume of pulmonary ventilation compared to the Finnish Landrace breed. Skin tempera- ture in Finnish bright in the daytime in different parts of the body ranges from 38,1–41,8 °C; it should be noted that the highest temperature was in the back and shoulder. The Pamir sheep fine-wool breeds with solar radiation, high daytime temperatures is more pronounced the function of sweat production in comparison with analogues of the breed Finnish Landrace.
