Effect of psycho emotional load on physiological status of a service dog
The paper presents data on age-related changes in the concentration of protein and steroid hormones in the blood of working dogs, depending on physical and psycho-emotional stress. It has been established that body temperature, respiration and pulse rates in young animals at the age of one and three years increase during the period of training. After a five-minute rest in year-old dogs, the pulse rate is above the norm by 20.17% and is 135.56 ± 2.50 beats per minute, the respiration rate is 80.85% and is 175.46 ± 2.51 respiratory movements per minute, body temperature is 40.02 ± 0.52 ° С, that is, 5% higher than in the state of rest. With increasing rest time, all physiological indicators of young dogs are close to their original position, a 60-minute rest after training for one-year-old and three-year-old dogs is not enough to restore the body's physiological parameters. While for adult dogs (five-year-old and eight-year-olds), a 60-minute rest after training completely ensures the restoration of general physiological parameters to a state of rest. The dynamics of recovery of general physiological parameters depending on physical and psychoemotional stress, taking into account the age of dogs, is accompanied by quantitative changes in the blood of hormone parameters: thyroxine, triiodothyronine, cortisol and thyreotrophin. It was established that the concentration of thyroid-stimulating hormone increases with age in dogs and is 1.153 ± 0.086 mIU / l in one-year-olds, and 1.471 ± 0.131 mIU / l in eight-year-olds, while the physical and psycho-emotional stress of dogs on the concentration of thyreotropin in the blood does not significantly affect. The hormone thyroxin increases with age in dogs, the concentration in one-year-old dogs alone is 27.32 ± 1.23 nmol / l, and in 8-year-old dogs it is 18.15 ± 0.45 nmol / l. The concentration of thyroxin in the blood of dogs increases during training, which seems to be connected with a large expenditure of energy. A 5-minute rest after training in blood of one-year-old dogs thyroxin is 34.70 ± 1.34 nmol / l, while eight-year-old dogs have a significantly lower blood concentration of 22.32 ± 0.38 nmol / l. At the same time, a 24-hour rest of dogs after physical and psychoemotional stress is sufficient to reduce the concentration of thyroxin in the blood to its original state. The highest concentration of cortisol in the blood of one-year-old and three-year-old dogs, the lowest in eight-year-old dogs. Cortisol in blood decreases with age in dogs and is 278.30 ± 15.30 nmol / l in one-year-old dogs, 184.60 ± 8.75 nmol / l in eight-year-old dogs. During the period of training, cortisol in the blood of dogs rises sharply and amounts to 333.91 ± 19.50 nmol / l in yearling dogs and 217.83 ± 6.20 nmol / l in eight-year-old dogs. The daily rest of service dogs after training is not enough to restore cortisol levels in one-year-old dogs, while in eight-year-old dogs the concentration of cortisol is at the initial level. In conclusion, it should be noted that the general physiological indicators of the body of working dogs and their hormonal status change with age and depend on physical and psycho-emotional stress. Daily rest is not sufficient to fully restore the physiological state of young dogs, while for adults the 24-hour rest is sufficient to restore the physiological state, they can be used to perform official duties.