Impact of industrial pollution on the population dynamics of Mytilusgalloprovincialis in the coastal region of El Jadida(Atlantic coast,Morocco)

The aim of this study is to evaluate the impact of industrial pollution on the parameters of the population dynamics of the musselmytilusgalloprovincialis,namely the asymptotic length (l∞),the growth coefficient (k) of the von bertallanfy equation and the recruitment profile and establish the length-weight relationship to determine the type of allometry. to achieve these objectives,three stations (s1,s2 and s3) were selected based on their proximity to industrial effluents (chemical complex of jorf-lasfar,morocco). mussel sampling (n=100/station) was performed monthly for 1 year. the biometric parameters measured are total weight,weight of flesh,length,width and thickness. the processing of the data was carried out using the fisat program version 1.2.2. the first results obtained show that the growth parameters estimated in the mussels from the nearest station releases (s3) are significantly lower (l∞=40.00mm and k=2.01yr-1) compared to the other stations (l∞=57.75mm and k=2.11yr-1 for station s3). the recruitment pattern appeared to be unimodalfor s3 and bimodal for s1and s2. the determination of the different regression lines reveals the existence of good correlations (r2 > 0.8) between the length and the total weight. moreover,the mussels collected from the different stations have a lower allometry (b < 3,p < 0.05). indeed,the total weight increases proportionally but less quickly than the length. © 2017,university of mohammed premier oujda morocco.