Biomaterial Database

Habituation of the corticosterone response of ducks (Anas platyrhynchos) to daily treadmill exercise. 1983

A Rees, and S Harvey, and J G Phillips

The habituation of the corticosterone response of ducks to treadmill exercise (1.1 km/hr 0 degrees incline for 60 min) has been determined over a 28-day period. In untrained birds 30 min of treadmill exercise resulted in a marked (P less than 0.001) increase in the basal plasma corticosterone level. After 60 min of exercise the corticosterone concentration remained elevated (P less than 0.001) in comparison with basal and control (nonexercised) levels but was less (P less than 0.01) than that at 30 min. Following exercise the concentration declined to basal levels within 60 min. After 7 days of daily training the peak (30 min) corticosterone response to exercise diminished by greater than 50% and was absent in birds trained for 21 days. This habituation of the corticosterone response may be due to adrenocortical stimulation by pituitary adrenocorticotrophin (ACTH) being reduced. As the stimulatory effect of ACTH administration (8 IU/kg) on corticosterone secretion does not habituate in birds treated daily (for 28 days), the reduced corticosterone response to exercise may be due to decreased ACTH release rather than to a reduction in adrenal ACTH sensitivity.

UI	MeSH Term	Description	Entries
D007700	Kinetics	The rate dynamics in chemical or physical systems.
D008297	Male		Males
D003345	Corticosterone	An adrenocortical steroid that has modest but significant activities as a mineralocorticoid and a glucocorticoid. (From Goodman and Gilman's The Pharmacological Basis of Therapeutics, 8th ed, p1437)
D004372	Ducks	A water bird in the order Anseriformes (subfamily Anatinae (true ducks)) with a broad blunt bill, short legs, webbed feet, and a waddling gait.	Duck
D005082	Physical Exertion	Expenditure of energy during PHYSICAL ACTIVITY. Intensity of exertion may be measured by rate of OXYGEN CONSUMPTION; HEAT produced, or HEART RATE. Perceived exertion, a psychological measure of exertion, is included.	Physical Effort,Effort, Physical,Efforts, Physical,Exertion, Physical,Exertions, Physical,Physical Efforts,Physical Exertions
D006185	Habituation, Psychophysiologic	The disappearance of responsiveness to a repeated stimulation. It does not include drug habituation.	Habituation (Psychophysiology),Habituation, Psychophysiological,Psychophysiologic Habituation,Psychophysiological Habituation,Habituations (Psychophysiology)
D000324	Adrenocorticotropic Hormone	An anterior pituitary hormone that stimulates the ADRENAL CORTEX and its production of CORTICOSTEROIDS. ACTH is a 39-amino acid polypeptide of which the N-terminal 24-amino acid segment is identical in all species and contains the adrenocorticotrophic activity. Upon further tissue-specific processing, ACTH can yield ALPHA-MSH and corticotrophin-like intermediate lobe peptide (CLIP).	ACTH,Adrenocorticotropin,Corticotropin,1-39 ACTH,ACTH (1-39),Adrenocorticotrophic Hormone,Corticotrophin,Corticotrophin (1-39),Corticotropin (1-39),Hormone, Adrenocorticotrophic,Hormone, Adrenocorticotropic
D000818	Animals	Unicellular or multicellular, heterotrophic organisms, that have sensation and the power of voluntary movement. Under the older five kingdom paradigm, Animalia was one of the kingdoms. Under the modern three domain model, Animalia represents one of the many groups in the domain EUKARYOTA.	Animal,Metazoa,Animalia