Effect of acclimatization to an excreta-collection harness on excreta energy voided during a nitrogen-corrected true metabolizable energy bioassay.
Two TMEn bioassays were made with adult cockerels to test the hypothesis that excretion inhibition, observed previously as induced by excreta-collection harnesses, can be overcome by a suitable acclimatization period. Each experiment was designed as a 2 x 2 x 3 factorial with normal birds and acclimatization birds fitted with harnesses or housed over collection trays and given one of three dietary treatments. The acclimatization period was 5.75 days. The harnesses generally reduced excreta energy output, and their removal was followed by a compensatory increase. Acclimatization failed to eliminate the harness effect.
Sibbald
I R
IR
Animal Research Centre, Agriculture, Canada, Ottawa, Ontario.
Wolynetz
M S
MS
D000222:Adaptation, Physiological; D000704:Analysis of Variance; D000818:Animals; D002645:Chickens / Q000502:physiology*; D003672:Defecation; D008297:Male; D011897:Random Allocation; D013048:Specimen Handling / Q000662:veterinary*; D014554:Urination