  The simplest model of a smart spatial redistribution of individuals is
proposed. A single-species population is considered, to be composed of two
discrete subpopulations inhabiting two stations; migration is a transfer
between them. The migration is not random and yields the maximization of net
reproduction, with respect to the transaction costs. The organisms are supposed
to be globally informed. Discrete time model is studied, since it shows all the
features of a smart migrations, while the continuous time case brings no new
knowledge but the technical problems. Some properties of the model are studied
and discussed.
