Abstract Kolevská J., V. Brunclík, M. Svoboda: Circadian Rhythm of Cortisol Secretion in
Dogs of Different Daily Activities. Acta Vet. Brno 2003, 72: 599-605. The concentrations of
immunoreactive cortisol were monitored over 24 hours in the serum of a total of 23 dogs.
The dogs were divided into three groups:(a) control group with no exercise,(b) experimental
group,(c) working dogs. Blood was collected from each dog at the intervals of 90–180 min.
The cortisol concentrations in different time periods were mutually compared using the …