42 



John B. Calhoun 



compared with the animars home range sigma, as determined by Hve trap- 

 ping and related observational procedures. 



D. The Distance between Neighbors of the Same Species 



From the observed tendency of a 1:2 ratio between alpha and beta 

 species when coexisting in the same habitat, it was concluded that the 

 home range centers for the alpha species should approximate a uniform 

 distribution. However, this analysis provided no insight into whether there 



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DISTANCE FROM H.R.C. 

 AT WHICH SIGNAL IS PERCEIVED 



Fig. 18. Theoretical conceptualization of signal characteristics with reference to 

 emission at a constant intensity at the home range center and detection and response 

 by others at distances from it. 



might be some ideal distance which should intervene between home range 

 centers. In order to seek this insight we shall consider a single species com- 

 munity in which all individuals have exactly the same-sized home range, 

 centers of home range are uniformly distributed, and the bivariate normal 

 distribution function describes the home range. 



Answers to two questions will be sought with reference to the relative 

 distance between home range centers: 



1. How does distance between home range centers affect the impact of 

 the community on the environment? 



2. How does the interval between home range centers affect the proba- 

 bility of one individual meeting or detecting its neighbors? 



The impact of an individual upon its environment should be proportional 



