Optimal Harvesting: Age Dependence

Age is an important parameter in population dynamics. This chapter concerns two regional control problems related to continuous models for age-dependent populations. The first problem is devoted to an optimal harvesting problem of a linear model when the harvesting effort acts only on the age interval \((a_1,a_2)\) . The second one is an optimal harvesting problem as well, related this time to a nonlinear model in a time-periodic environment. The attention is focused on the determination of the position and length of the time intervals when the harvesting is allowed/prohibited.