240 



RECOVERY FROM ANAEROIHO^'^LS 



the grasshopper Melanoplus femur-rubrum 1.9 times 

 and in those of Melanoplus differentialis 1.25 times the 

 debt (Gihiiour, 1941a). It would be interesting to know 

 whether the various tissues of these animals show a dif- 

 ference in the extent of repayment. This problem sug- 

 gests itself because of the lower repayment (c/. above) 

 observed by Bodine (1928) with intact animals. The 



Time in hours 



Fig. 8. Repayment of oxygen debt by Periplaneta orientalis. AB, 

 normal oxygen uptake in aerobic surroundings. BB', curve that would 

 have resulted if the animal had been kept in aerobic surroundings. BC, 

 time of exposure to anaerobic conditions (I14 hour). CB', oxygen up- 

 take during recovery from anaerobiosis. CC, theoretical curve that 

 would have resulted if the animal had not repaid its oxygen debt. (Ac- 

 cording to Davis and Slater, 1926.) 



