We discuss the Lotka-Volterra dynamics of two populations, preys and predat
ors, in the case when the predators posses a genetic information. The genet
ic information is inherited according to the rules of the Penna model of ge
netic evolution. Each individual of the predator population is uniquely det
ermined by sex, genotype and phenotype. In our case, the genes are represen
ted by 8-bit integers and the phenotypes are defined with the help of the 8
-state Potts model Hamiltonian. We showed that during time evolution, the p
opulation of the predators can experience a series of dynamical phase trans
itions which are connected with the different types of the dominant phenoty
pes present in the population.