title: The stabilizability of a controlled system describing the dynamics of a fishery.
abstract: This work presents two stock-effort dynamical models describing the evolution of a fish population growing and moving between two fishing zones, on which it is harvested by a fishing fleet, distributed on the two zones. The first model corresponds to the case of constant displacement rates of the fishing effort, and the second one to fish stock-dependent displacement rates. In equations of the fishing efforts, a control function is introduced as the proportion of the revenue to be invested, for each fleet. The stabilizability analysis of the aggregated model, in the neighborhood of the equilibrium point, enables the determination of a Lyapunov function, which ensures the existence of a stabilizing discontinuous feedback for this model. This enables us to control the system and to lead, in an uniform way, any solution of this system towards this desired equilibrium point.
authors.affiliation: Laboratoire de biométrie, université Claude-Bernard-Lyon-1, 43, bd du 11-Novembre-1918, 69622 Villeurbanne cedex, France. racmchich@yahoo.com
authors.forename: Rachid
authors.initials: R
authors.lastname: Mchich
authors.forename: Pierre
authors.initials: P
authors.lastname: Auger
authors.forename: Nadia
authors.initials: N
authors.lastname: Raïssi
mesh_terms: D000818:Animals; D005398:Fisheries / Q000706:statistics & numerical data*; D005399:Fishes; D008954:Models, Biological; D009018:Morocco; D011157:Population Dynamics