Le Page Christophe, Cury Philippe. (1995). Age dependent fecundity and the dynamics of a density-dependent population model. Mathematical and Computer Modelling, 21 (6), p. 13-26. ISSN 0895-7177.
Titre du document
Age dependent fecundity and the dynamics of a density-dependent population model
Année de publication
1995
Type de document
Article
Auteurs
Le Page Christophe, Cury Philippe
Source
Mathematical and Computer Modelling, 1995,
21 (6), p. 13-26 ISSN 0895-7177
The Ricker stock-recruitment (SR) relationship is one of the most commun mathematical models used in fishery science. Without age-structure, this model is a first-order difference equation that shares with other and similar non-linear models complicated behaviors, including chaotic ones. As many animal populations have demographic characteristics that differ with age, the importance of considering age-structure within population dynamics models may be critical. Introducing age-structure in the Ricker model considerably complicates the behavior of the population-dynamicss due to a great sensitivity to life-history parameters. The goal of this study is to explore some of those behaviors. A discrete self-regenarating and age-structured model, based on the Ricker SR relationship, is applied to small pelagic fish's species. As any synthetic reproductive function is not defined, the classical Leslie matrix notation is not used. Consequently, the exploration of the dynamic behaviors of the model is performed by numerical simulations with associated graphical tools (attractors and bifurcation diagrams). The main result of this study deals with the distribution among age classes of the "reproductive potential per recruit". (D'après résumé d'auteur)
Plan de classement
Appliquées à la pêche [040INFSTA01]
Descripteurs
MODELE MATHEMATIQUE ; POISSON MARIN ; DYNAMIQUE DE POPULATION ; FECONDITE ; MORTALITE ; SIMULATION ; OCEANOGRAPHIE DES PECHES ; MODELE DE RICKER
