762 



PHYSIOLOGICAL STIDIFS OF THE KLFFED GROISE 



The average trend of rectal temperature during the period of the test is plotted in figure 90. 

 It shows greater variability among the birds living at 65°F. (Group A). Also the birds in this 

 group maintained their temperature at a higher level than did those in Group B which were 

 subject to greater loss of body heat by radiation at 40°F. than at 65°F. It is probable that 

 a difference of 20 degrees in air temperature would have a more pronounced effect upon 

 the metabolism of fasting grouse than upon that of well-fed grouse. 



107.0 I 



106.0 1 



a. 



I- 

 < 



q: I0S.0 



104.0 



< 



U 



UJ 



Q^ 103.0 



102.0 '-' L, 



Of-oup A at <<>b"r 

 Group B ol 40 T 



_l_ 



-L. 



5 2 2 2 



< a. 5 < 



72 96 



5 Z 



0. 5 



z 2 2 



2 < CL 

 144 



' r 



I 10 7 



FI(;l RE 'JO. 



120 144 168 192 216 



TIME OF DAY & HOURS OF FASTING 



TKKND.S 1\ KKCTAI, TK M PKRATl'Kl-: .\MON(, TWO GKOl PS OK K.V.STING ADl l.T (.KOI SIC 

 MKl.l) \l l)IFFER^:^T AIR TEMPERATURES 



The respiration rates recorded for these birds are sununari/.ed in table 109. When com- 

 pared with ihe data secured for well-fed birds in Experiment 1. tabli' 102. they show^ that 

 fasting lowered this rate in both sexes. Also shown is a distinct difference in this reaction at 

 40°F. and at f)S°P'. similar to the trend in rectal temperature. Furthermore, tlie difference 

 between the sexes at 40° F.. namely 13 respirations per minute higher for female, is statis- 

 tically significant. 



TAHLli 109. liKKECT OF STARVATION UPON HESPIK.VITDN WVVK OK ADIJI.T <;H()I SK* 



*Waler available. 



As a second part of this experiment, six additional grouse I Group Cl were held at 65°F. 

 with neither food nor drinking water available for 84 hours. The average rectal tempera- 

 tures and respiration rales of these birds are presented in table 110. During the period of 

 study half the birds died. Since this group wa.* tested under identical environmental condi- 



