Bacaër Nicolas auteur aut IRD text journalArticle eng text/pdf born digital access This article considers three different aspects of periodic matrix population models. First, a formula for the sensitivity analysis of the growth rate lambda is obtained that is simpler than the one obtained by Caswell and Trevisan. Secondly, the formula for the basic reproduction number a">(0) in a constant environment is generalized to the case of a periodic environment. Some inequalities between lambda and a">(0) proved by Cushing and Zhou are also generalized to the periodic case. Finally, we add some remarks on Demetrius' notion of evolutionary entropy H and its relationship to the growth rate lambda in the periodic case. specialized Periodic Matrix population model Reproductive value Basic reproduction number Entropy 020 71 7 1781-1792 2009 0092-8240 https://www.documentation.ird.fr/hor/fdi:010048218 10.1007/s11538-009-9426-6 0092-8240 [F B010048218] https://www.documentation.ird.fr/hor/fdi:010048218 https://www.documentation.ird.fr/intranet/publi/2009/10/010048218.pdf Accès réservé (Intranet de l'IRD) IRD - Base Horizon / Pleins textes 2009-11-09 2017-08-23 fdi:010048218 fre