  We consider a model of fishery management, where $n$ agents exploit a single
population with strictly concave continuously differentiable growth function of
Verhulst type. If the agent actions are coordinated and directed towards the
maximization of the discounted cooperative revenue, then the biomass stabilizes
at the level, defined by the well known "golden rule". We show that for
independent myopic harvesting agents such optimal (or $\varepsilon$-optimal)
cooperative behavior can be stimulated by the proportional tax, depending on
the resource stock, and equal to the marginal value function of the cooperative
problem. To implement this taxation scheme we prove that the mentioned value
function is strictly concave and continuously differentiable, although the
instantaneous individual revenues may be neither concave nor differentiable.
