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Effect of cadmium exposure on essential omega-3 fatty acids in the edible bivalve Donax trunculus

  • Environmental sustainability and pollution prevention
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Abstract

Donax trunculus is the most consumed bivalve by the local population of the Northeast Algeria for its nutritional value. Therefore, the aim of the current study was to determine the effects of cadmium (Cd), a known toxic metal, on the alterations in main essential omega-3 fatty acids, i.e., eicosapentaenoic acid (EPA; C20:5n-3) and docosahexaenoic acid (DHA; C22:6n-3), in male and female gonads of D. trunculus during the reproduction period at spring (before spawning). Additionally, this work seeks to describe the relation between EPA and DHA with non-methylene-interrupted dienoic (NMID) fatty acids, and explores their possible contribution of to protect against Cd stress. The samples were collected at El Battah, a relatively clean sea shore, and reared in the laboratory. Physico-chemical parameters such as temperature, pH, salinity, and dissolved oxygen were measured. Cd was added to the rearing water at two sublethal concentrations (LC10 and LC25-96h, as determined previously). A two-way ANOVA analysis indicated significant effects of concentrations and genders for both fatty acids. Our results showed a significant reduction in EPA and DHA concentrations in the both genders, with a strong effect in females. There was also a negative correlation between NMID fatty acids and the two essential omega-3 fatty acids for each gender.

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Acknowledgements

We are grateful to the members of Physiologie de Nutrition & Toxicologie (NUTox) laboratory (Pr. N. Khan) for technical assistance with GC analyzes. This research was supported by the Algerian Fund for Scientific Research of Algeria (Laboratory Applied Animal Biology to Pr. N. Soltani) and by the Ministry of High Education and Scientific Research of Algeria (CNEPRU Project N° F01120140104 to Pr. N. Soltani).

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  1. Laboratory of Applied Animal Biology, University Badji Mokhtar of Annaba, 23000, Annaba, Algeria

    Isma Merad & Noureddine Soltani

  2. INSERM UMR 1231 Equipe – Lipoproteins and lipid transfers in sterile and septic inflammation (LIPNESS), Université Bourgogne Franche Comté (UBFC), UFR SVTE, 6 Boulevard Gabriel, 21000, Dijon, France

    Sandrine Bellenger

  3. INSERM UMR 1231 Equipe Physiologie de Nutrition & Toxicologie (NUTox), UFR SVTE, 6 Boulevard Gabriel, 21000, Dijon, France

    Aziz Hichami & Naim Akhtar Khan

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  1. Isma Merad
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Merad, I., Bellenger, S., Hichami, A. et al. Effect of cadmium exposure on essential omega-3 fatty acids in the edible bivalve Donax trunculus . Environ Sci Pollut Res 25, 18242–18250 (2018). https://doi.org/10.1007/s11356-017-9031-4

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