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Cadmium in the waters off South Morocco: Nature of particles hosting Cd and insights into the mechanisms fractionating Cd from phosphate ArchiMer
Waeles, Mathieu; Planquette, Helene; Afandi, Imane; Delebecque, Nina; Bouthir, Fatimazohra; Donval, Anne; Shelley, Rachel U.; Auger, Pierre-amael; Riso, Ricardo D.; De Morais, Luis Tito.
In this study, we report the distributions of total dissolvable cadmium and particulate cadmium from 27 stations in southern Moroccan coastal waters (22°N–30°N), which is part of the North-West African upwelling system. These distributions were predominantly controlled by upwelling of the North Atlantic Central Waters (NACWs) and uptake by primary production. Atmospheric inputs and phosphogypsum slurry inputs from the phosphate industry at Jorf Lasfar (33°N), recently estimated as an important source of dissolved cadmium (240 t Cd yr−1), are at best of minor importance for the studied waters. Our study provides new insights into the mechanisms fractionating cadmium from phosphate. In the upper 30 m, the anomalies observed in terms of Cd:P ratios in both...
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Ano: 2016 URL: https://archimer.ifremer.fr/doc/00334/44520/44216.pdf
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Significance of metallothioneins in differential cadmium accumulation kinetics between two marine fish species ArchiMer
Le Croizier, Gael; Lacroix, Camille; Artigaud, Sebastien; Le Floch, Stephane; Raffray, Jean; Penicaud, Virginie; Coquille, Valerie; Autier, Julien; Rouget, Marie-laure; Le Bayon, Nicolas; Lae, Raymond; De Morais, Luis Tito.
Impacted marine environments lead to metal accumulation in edible marine fish, ultimately impairing human health. Nevertheless, metal accumulation is highly variable among marine fish species. In addition to ecological features, differences in bioaccumulation can be attributed to species-related physiological processes, which were investigated in two marine fish present in the Canary Current Large Marine Ecosystem (CCLME), where natural and anthropogenic metal exposure occurs. The European sea bass Dicentrarchus labrax and Senegalese sole Solea senegalensis were exposed for two months to two environmentally realistic dietary cadmium (Cd) doses before a depuration period. Organotropism (i.e., Cd repartition between organs) was studied in two storage...
Tipo: Text Palavras-chave: Metal; Trace element; Dicentrarchus labrax; Solea senegalensis; Chronic dietary exposure.
Ano: 2018 URL: https://archimer.ifremer.fr/doc/00437/54810/56480.pdf
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Stable isotope analyses revealed the influence of foraging habitat on mercury accumulation in tropical coastal marine fish ArchiMer
Le Croizier, Gael; Schaal, Gauthier; Point, David; Le Loc'H, Francois; Machu, Eric; Fall, Massal; Munaron, Jean-marie; Boye, Aurelien; Walter, Pierre; Lae, Raymond; De Morais, Luis Tito.
Bioaccumulation of toxic metal elements including mercury (Hg) can be highly variable in marine fish species. Metal concentration is influenced by various species-specific physiological and ecological traits, including individual diet composition and foraging habitat. The impact of trophic ecology and habitat preference on Hg accumulation was analyzed through total Hg concentration and stable isotope ratios of carbon (δ13C) and nitrogen (δ15N) analyses in the muscle of 132 fish belonging to 23 different species from the Senegalese coast (West Africa), where the marine ecosystem is submitted to nutrients inputs from various sources such as upwelling or rivers. Species-specific ecological traits were first investigated and results showed that vertical (i.e....
Tipo: Text Palavras-chave: Methylmercury sources; Trophic ecology; Feeding habitat; Metal bioaccumulation; Chemical tracers; Isotopic niche.
Ano: 2019 URL: https://archimer.ifremer.fr/doc/00458/57013/58912.pdf
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Trace metal distribution in pelagic fish species from the north-west African coast (Morocco) ArchiMer
Afandi, Imane; Talba, Sophia; Benhra, Ali; Benbrahim, Samir; Chfiri, Rachid; Labonne, Maylis; Masski, Hicham; Lae, Raymond; De Morais, Luis Tito; Bekkali, Mohammed; Bouthir, Fatima Zohra.
In the current study, ten elements contents (Fe, Zn, Mn, Cu, Cr, Co, Ni, Cd, Pb and Hg) have been measured in muscle and liver of four pelagic fish species (Engraulis encrasicolus, Sardina pilchardus, Scomber japonicus and Trachurus trachurus) from the north-west African coast (South Atlantic Moroccan coast), collected during summer and autumn seasons (July and December 2013, respectively). Significant differences in metal contents were found between the different species (p < 0.05). Metals levels were also much higher in liver than those recorded in muscle tissues. The concentrations of Fe, Zn, Cd, Co, Cu and Pb were significantly higher in mackerel liver (p < 0.05).While, in muscle, anchovy presents a higher content of Mn, Cu, Cr, Ni and Pb. A high...
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Ano: 2018 URL: https://archimer.ifremer.fr/doc/00616/72787/72126.pdf
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Trophic ecology influence on metal bioaccumulation in marine fish: Inference from stable isotope and fatty acid analyses ArchiMer
Le Croizier, Gael; Schaal, Gauthier; Gallon, Regis; Fall, Massal; Le Grand, Fabienne; Munaron, Jean-marie; Rouget, Marie-laure; Machu, Eric; Le Loc'H, Francois; Lae, Raymond; De Morais, Luis Tito.
The link between trophic ecology and metal accumulation in marine fish species was investigated through a multi-tracers approach combining fatty acid (FA) and stable isotope (SI) analyses on fish from two contrasted sites on the coast of Senegal, one subjected to anthropogenic metal effluents and another one less impacted. The concentrations of thirteen trace metal elements (As, Cd, Co, Cr, Cu, Fe, Li, Mn, Ni, Pb, Sn, U, and Zn) were measured in fish liver. Individuals from each site were classified into three distinct groups according to their liver FA and muscle SI compositions. Trace element concentrations were tested between groups revealing that bioaccumulation of several metals was clearly dependent on the trophic guild of fish. Furthermore,...
Tipo: Text Palavras-chave: Trace elements; Biochemical tracers; Diet; Contamination; Senegal; Tropical fish.
Ano: 2016 URL: https://archimer.ifremer.fr/doc/00348/45908/45707.pdf
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