Abstract : The framework of this article is modelling applied to
fisheries. It aims at relating some classical
stock-recruitment curves to a dynamic structured
model, consisting of the adults stages of the stock
and a pre-recruits stage (i.e. eggs, larvae,
juveniles). The main result is that no functional
stock-recruitment relationship can be found, unless
further restrictive assumptions are added to the model
(slow-fast dynamics and uniformity). Among the curves
thus obtained is the Beverton--Holt curve, but not
Ricker's.