title: [Effect of noise on the physiological functions in fowl. 3. Effects of primary and repetitive acoustic stimulation on glucose and free-fatty-acid plasma levels in broilers of different age groups].
abstract: The effects of first and repetitive noise applications to broilers, aged 14, 28, and 56 days, were tested by the responses of the energetic substrates plasma glucose concentration and free fatty acids. The plasma concentrations of glucose and free fatty acids in broilers at slaughter age with no exposure to noise were higher than those in younger animals. Regular daily noise application of 100 dB, 60 to 8,000 Hz, for 30 minutes, which began on the first day of age, led to rises in the plasma glucose levels of animals aged 56 and 28 days even prior to renewed acoustic stimulation, which obviously was a conditioned reflex. Such rises were accompanied by decline in plasma concentrations of free fatty acids, which phenomenon was attributed to higher initial values of plasma glucose. First as well as repetitive noise application led to changes in the plasma content of energetic substrates. Both the direction and magnitude of the reaction appeared to depend on the given initial value. The plasma level responses of glucose and free fatty acids were opposite to one another in all animals, 56 days of age, which were exposed to repeated noise.
mesh_terms: D000161:Acoustic Stimulation; D000222:Adaptation, Physiological; D000367:Age Factors; D000818:Animals; D001786:Blood Glucose / Q000032:analysis*; D002645:Chickens / Q000097:blood*; D005230:Fatty Acids, Nonesterified / Q000097:blood*; D009622:Noise / Q000009:adverse effects*
chemical_list: D001786:Blood Glucose; D005230:Fatty Acids, Nonesterified
vernacular_title: Der Einfluss von Geräuschen auf physiologische Funktionen beim Huhn. 3. Mitteilung: Der Einfluss erstmaliger und wiederholter akustischer Reizbelastung auf die Plasmaspiegel an Glukose und freien Fettsäuren bei verschieden alten Broilern