PHYSIOLOGICAL STUDIES OF THE RUFFED GROUSE 



763 



tions with the other two, except for the absence of drinking water, it would appear that 

 such water, or a suitable substitute, is a daily physiological need of grouse. 



TABLE 110. EFFECT OF STARVATION WITHOUT WATER UPON THE RECTAL 

 TEMPERATURE AND RESPIRATION R.VTE OF ADULT GROUSE* 



*Group C, at air temperature 65° F. 



The influence of length of fasting, time of day, and absence of drinking water upon the 

 leinpt-rature-regulating niechaiiisin is presented in figure 91. The female grouse in Group 

 C showed least resistance to fasting, as indicated by the trend of their temperature, especially 

 at midday. After the 48th hour of fasting without water neither the males nor females were 



ioe.O| 



107.5 



Id 



D 107.0 



!< 



u 



Q. 



IS 10 &S 



UJ 



I- 



_l 

 < 



I- 10 6.0 1 



U 



10 5.5 



,106.0 



107.5 



107.0 



Ji0&5 



106.0 



105.5 



105.0 



24 4a 72 9 6 



NOON P.M. NOON P.M. NOON PM. NOON P.M. NOON 



U 105.0 



DURATION OF TEST IN HOURS 



FICURK 91. TRENDS IN RECTAL TEMPERATURE AMONG MALE AND FEMALE ADULT CROU.SE 



FASTING WITHOUT DRINKING WATER 



