536 



PROnVCTIVITY OF GROUSE POPIUTIONS 



Fall Po pu \a4lon- 1mm 



Foil Populotloo- Adult 



To+ol Lo&a ^o Following Fall 



V) 

 Q 



in 



300 



ZOO 



(t 



Ul 



a> 100 



D 

 2 



CONNECTICUT HILL 



300 



ZOO 



loo 



10 



o 



u 



D 

 Z 



I 

 I 



ADIRONDACK 



too 



So 



1950-31 3I-3Z 32r33 33-3-i 34-35 3536 3<i-37 37-38 3&-39 39-40 40-4 1 4I-4Z 



YEAR 



FIGURE 48. AI)l I.T MOKTAI.ITY (SEPTEMBER TO SEI'TKMBER I L\ REI.VTION TO THE COMPOSITION 

 OF THE FALL POPULATION ON CONNECTICUT HILL AND ADIRONDACK AREAS — 1930-31 TO 1941-42 



cussed in Chapter Vll. But just how these and main others interact in relation to their 

 resultant effect on adult survival remains as a problem for future study. 



Adult mortality each year has taken place largely between fall and the following breeding 

 season although losses have continued to be high among the nialos during April. I-osses dur- 

 ing the summer have consistently been light. Furthermore, witiiin the former period they have 

 reached their peak during February and March although ap])n'(iahle losses among males have 

 continued during the drumming season in April. \\ itli respect to the majorilv i>f the dead 

 grouse picked up on the survev areas it has been possible to estimate quite closely the time 

 of di'alh. Tliix- (lata arc jilottcd in figure 50*. No important variations between years have 

 been noted. 



* On arrna nprn to hunlinK fl minor htimp in thr fur%-e during liir open drnson wonlH be expected. 



