Lipid reserves of striped red mullet (Mullus surmuletus, L., 1758) from North-west Moroccan Mediterranean coast

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Lipid reserves of striped red mullet (Mullus surmuletus, L., 1758) from North-west Moroccan Mediterranean coast

Maryam El Bakali, Abdenbi Bendriss, Mostafa Talbaoui
Int. J. Biosci.15( 4), 483-492, October 2019.
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Total lipid content has been analyzed for the first time in gonads, liver and muscle of striped red mullet (Mullus surmuletus L., 1758) from the Moroccan Mediterranean Sea during maturing and pre-spawning stage. This present study was conducted in order to evaluate the lipid reserves and to determine the correlation with length and water content for total lipid content in tissues of striped red mullet. Results showed that lipid content in the muscle ranged from 2. 93 to 22.33% and demonstrated that muscle was the major energy storage site in this species. The absolute lipid content in muscle (mean= 0.66 g±0.67) was higher than that in liver (mean= 0.058g±0.07). Moreover, it was highlighted that during reproduction period, liver relative lipid content did not vary. Mean values for percentage of lipid reserve in ovary and liver for maturing females were 21.33 and 10.84% respectively whereas they were 28.22 and 8.05% respectively for pre-spawning females. These results emphasize that the lipid stored in the muscle during the maturing stage is mobilized toward the gonad during pre-spawing. Regression analysis showed that the percentage of lipid in gonad and muscle revealed a significant relationship with length. An inverse linear relationship was obtained between percentage of water content and lipid content of muscle and gonad.


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