Abstract
Oxygen utilization of 30 pheasent eggs, incubated at different conditions (39.0-degrees-C, 37.8-degrees-C, 36.0-degrees-C) was researched. For the first time dates were taken using a platinum-silver electrode (modified Clarc-electrode). The new methode proofed a high accuracy and reproductability of the dates collected and qualified for the use in routine application. The embryonic development, represented by the embryonic breathing activity, was distinctly greater at averagely higher temperatures, rising from the first to the last day. Between day 19 and day 21 the oxygen utilization reached a steady state or was reduced.