Migration and Predator-Prey Interaction Between Two Species

The ratio GgIoi is larger than 1 and increases with the weight of the higher multiple-birth processes. This increase of the width of the distribution, for which an explicit form has now been found, is not unexpected, as multi-step processes always imply a higher fluctuation than single-step processes. This effect becomes evident in Fig. 4.15 in which two given distributions are compared  

2) A distribution p (n) generated by single-birth processes only with the same mean value n and birth-death rates chosen in correspondence to those of 

Calculating the mean life times of the quasi-stationary distributions n) and pfj n) for the Hanson [4.17] observations presented at the end of Sect. 4.3.1, = 1460 years and = 79 years are obtained. 

4 Migration and Predator-Prey Interaction Between Two Species 

This section is meant to contribute to the old problem of the interaction between two biological species. To be or not to be is the essential question decided by the predator-prey interaction for the members of certain species. The famous Volterra-Lotka model for this problem [4.21,22] has attracted many researchers who have tried to generalize it in many respects [4.1, 6, 8, 9, 23-26]. 

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Migration and Predator-Prey Interaction Between Two Species 129 where the following forms for the individual migration probabilities are adopted... 

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