%0 Journal Article %9 ACL : Articles dans des revues avec comité de lecture répertoriées par l'AERES %A Faugeras, Blaise %A Maury, Olivier %T A multi-region nonlinear age-size structured fish population model %D 2005 %L fdi:010042250 %G ENG %J Nonlinear Analysis Real World Applications %@ 1468-1218 %K population dynamics ; age size structure ; system of partial differential equations ; initial boundary value problem ; variational formulation ; positivity %M CC:0002281685-0003 %N 3 %P 447-460 %R 10.1016/j.nonrwa.2004.09.005 %U https://www.documentation.ird.fr/hor/fdi:010042250 %V 6 %W Horizon (IRD) %X The goal of this paper is to present a generic multi-region nonlinear age-size structured fish population model, and to assess its mathematical well-posedness. An initial-boundary-value problem is formulated. Existence and uniqueness of a positive weak solution is proved. Eventually, a comparison result is derived: the population of all regions decreases as the mortality rate increases in at least one region. (c) 2004 Elsevier Ltd. All rights reserved. %$ 040