|
|||||
|
|
Thermal panting and respiratory alkalosis in the laying hen |
|
| Authors: | H El Hadi A H Sykes |
| Institution: | 1. Wye College , University of London , Ashford , Kent , TN25 5AH , England;2. Faculty of Veterinary Science , University of Khartoum , Sudan;3. Wye College , University of London , Ashford , Kent , TN25 5AH , England |
| Abstract: | 1. Changes in respiratory rate (f), rectal temperature (Tr ) and blood acid‐base values were measured in laying hens exposed to ambient temperatures (Ta) of 32, 35, 38 or 41 °G. 2. At Ta 32 °G there was no panting. At Ta 35 °G panting occurred without any increase in Tr but there was a slight alkalosis (pH 7.55). 3. At Ta 38 °G Tr increased and panting was accompanied by moderate alkalosis (pH 7.58). 4. At Ta 41 °G Tr increased considerably and severe alkalosis developed (pH 7.65). 5. From the relation between Tr , f and pH it is concluded that some degree of alkalosis is a normal response to panting in the laying hen. |
| Keywords: | |