PRODUCTIVITY OF POPULATIONS 



533 



Foil Populafion 



Sunvival +o Followinq Foi 



500 



400 



U) 30O 



a 



CD 

 U. 



Ozoo 



Z loo 



CONNECTICUT HILL 



500 



400 



300 



ZOO 



loo 



I I I ' ' I 



«/) loo 



a. 



ID 



o 



q: 

 u 

 IS 



D 

 Z 



50 



ADIRONDACK 



loo 



bo 



I930-31 Sl-32 3Z-33 33-34 3435 3&36 3037 31 38 38-39 39-40 40-*l 41-42 



YEAR 



FIGURE 45. RELATIONSHIP OF ADULT SURVIVAL TO FALL POPULATION LEVEL ON CONNECTICUT 



HILL AND ADIRONDACK AREAS — 1930-1942 



records had been grouped according to the density at the beginning of the period each 

 year, further evidence of a fundamental relationship of this kind was revealed (table 86). 

 Again it was more pronounced on the northern area. 



It is on this basic tendency for the proportion of mortality to vary with the fall population 

 level that the concept of carrying capacity* depends. That the figures have in many instances 



* See discussion of Carrying Capacity, p. 522. 



