Past, present and future of the Allis shad, Alosa alosa, assessed by a two-step population dynamics approach Thibaud ROUGIER 1* , Hilaire DROUINEAU 1 , Géraldine LASSALLE 1 , Eric ROCHARD 1 , Patrick LAMBERT 1 National Research Institute of Science and Technology for Environment and Agriculture (1) Irstea, Aquatic Ecosystems and Global Changes Research Unit, 50 avenue de Verdun, F-33612 Cestas cedex, FRANCE (*) E-mail : thibaud.rougier@irstea.fr American Fisheries Society Annual Meeting, 17-21 August 2014 Stock Recrutement Stock Recrutement S  R R  S S eq R eq Fcrash S lim R lim S1 S2 R1 R2 R3 S’1 S’2 R’1 R’2 R’3