§5.111 RESPIRATION 171 



although these mock-implanted controls showed a greater drop in 

 oxygen consumption than those with mock allatectomy. The flies 

 with implanted corpora allata had a mean oxygen consumption 

 19 per cent above that of the controls (Fig. 5-2). The corpus 



5 10 15 20 25 30 35 40 45 50 55 

 Oxygen consumption mm^/lQO mg fly/IOmin, 

 in class intervals 



60 



Fig. 5-1. Effect of removing the corpus allatum on the oxygen 

 consumption of 7-day-old blow-flies, Calliphora erythrocephala, 

 at 25 °C. Oxygen consumption of allatectomized flies is shown 

 below and that of mock-operated controls above. The number of 

 flies giving results within each 5 mm^O./lOO mg fly/ 10 min class 

 (abscissae) is shown as a percentage, up or down the ordinate scale. 

 The mean oxygen consumption for the allatectomized flies is 

 clearly reduced as compared with that of the controls (from 

 Thomsen, 1949). 



