0,0 0,Z 0,i/ 0,6 0,S Y 



Fig. 9. Adaptive {h^^ and A-^o) and passive (a^) rises as functions of 

 coefficients of nonlinearity (6) and heterogeneity ( t) . 



Furthermore, the following estimates are valid: 



^^3 > ^al' n ^ ^al "^ ^n- 



(2.31') 



Therefore, it is sufficient to calculate the first two values of 



A,i and A^, in order to determine their weight. The nomogram which this 



requires is presented in Fig. 9. 



It is important to be able to estimate the mean probabilities p 

 [see (2.15)], corresponding to values of the operative characteristic of 

 the adaptive cycle P^ > P2 > P3 > P4- Their ratios to pj^ 



, _ P2 . „ - P3 . _ _ P4 



> TT-, 



Pi 



values of 



U2: 



n, - —1. are expressed through the corresponding 

 Pi Pi 

 U3 and U4 as follows: 



H 



l-ap^(l-M^-) 



> U,- 



(i = 2, 3, 4) 



(2.32) 



Thus, for full calculation of all of the parameters of interest to 

 us, it is sufficient to be able to calculate the parameters 6 and y, 

 which, in the general case, requires solution of the cumbersome 

 transcendental equation (2.21). Also, the linear case v(2) = v^(Z) fits 

 practically completely in the jrder of accuracy of the initial experi- 

 mental data on the values of x^ (a = TT^) . Actually, if we number the 

 components of the community in order of decreasing mortality of their 

 individuals x^ > X2 > ••• ^ x > ... > x , and then, using the method 

 of least squares, straighten their function 



1 - 2x, 



«- 



1 - X. 



+ A 



353 



