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Ecology and Epidemiology. Nicholson Bailey host - parasitoid model. H n , P n – population densities of hosts and parasitoids at season no n. R H , R P , a - parameters. Variations. Variations. K H – environmental capacity for host population. Equilbrium Stability of equilbrium.
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Nicholson Bailey host - parasitoid model Hn, Pn – population densities of hosts and parasitoids at season no n RH, RP, a - parameters
Variations KH – environmental capacity for host population
How dynamics of N-B models depend on environmental capacity ?
Kermack – McKendrick SIR epidemic model S – susceptibles I – infectives R - removals
Severity of epidemic Relative removal rate
N – population size N=S+ R N=S0 =1- S / S0 - contract of the disease