The use of the birth and death processes at the mussel Mytilus galloprovincialis as an indicator

of El Jadida ecosystem health (MOROCCO)


M. Merzouki*, J. Sif

Université Chouaib Doukkali, Faculté des Sciences, Laboratoire d’Etude et d’Analyse Environnementales,

Equipe de Physiologie et d’Ecotoxicologie, B.P. 20, 24000 El Jadida, Maroc.

* Corresponding author. E-mail:

Received: 05 January 2012; revised version accepted: 02 March 2012



     Sea mussels, Mytilus galloprovincialis, sampled from four sites along seacoast of El Jadida city (Site of Hawzia1 (H1), Site of Hawzia2 (H2), Site of Jorf-Lasfar (  J) and Site of Oualidia (O) were exposed to seawater of each site under laboratory conditions.

     Using the birth and death processes, both Hawzia1 mussels and those of Jor-Lasfar showed reduced survivability and decreased time to extinction with value of 214.7 days and 177.2 days respectively during the monitoring, indicating a less healthy status in animals from these sites.


Keywords: Birth and death processes; Mussel Mytilus galloprovincialis; Ecosystem health; Biomonitoring; El Jadida city.



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