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ISSN: 2375-3854

International Journal of Ecological Science and Environmental Engineering

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Estimated Growth of the Mediterranean Mussel Mytilus Galloprovincialis from a Polluted Natural Environment in Atlantic Coast of Morocco

International Journal of Ecological Science and Environmental Engineering
Vol.6 , No. 1, Publication Date: May 17, 2019, Page: 1-8

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Authors

[1]	Khalil Amine, Physiology and Ecotoxicology Team, Chouaib Doukkali University, Faculty of Sciences, El Jadida, Morocco.
[2]	Sif Jamila, Physiology and Ecotoxicology Team, Chouaib Doukkali University, Faculty of Sciences, El Jadida, Morocco.
[3]	Mokhliss Khadija, Physiology and Ecotoxicology Team, Chouaib Doukkali University, Faculty of Sciences, El Jadida, Morocco.
[4]	El Hamri Hicham, Health National Institute, Ministry of Health, Rabat, Morocco.

Abstract

Absolute and relative growth was studied for the first time in the mussel Mytilus galloprovincialis from a polluted natural environment. Four sampling stations in two locations along the coast of El Jadida city and neighboring wastewater discharges were chosen to this purpose: Station H located at the Haouzia site and the J₁, J₂ and J₃ stations located in Jorf Lasfar site; with a larger metal pollution. Total weight and total length were measured to estimate different growth parameters. Growth curves analysis related to each stations reveals substantial difference in growth patterns between mussels of Jorf Lasfar site (J₁, J₂ and J₃ stations) and Haouzia (station H). The growth parameters were as follow: The lowest value of asymptotic length (L∞) estimated at 7.2 cm for station H individuals and between 7.5 and 7.9 cm for those of Jorf Lasfar site. The Growth constant (K) is between 0.2 and 0.24 / year and the growth performance index (ǿ) is relatively low for mussels at both sites. Length-weight relationship indicated isometric growth with b statistically close to 3 for all surveyed stations.

Keywords

"Mytilus galloprovincialis, Growth Parameters, Absolute Growth, Lengths-Weight Relationship, Relative Growth, Atlantic Coast "

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