Publications by authors named "Raymond Lae"
Article Synopsis
- The study examined how cadmium (Cd) is distributed within the liver of two marine fish species, the European sea bass and the Senegalese sole, after they were fed cadmium over two months, followed by a two-month detox period.
- During detoxification, sea bass primarily stored cadmium in detoxifying proteins, whereas the sole stored it in more sensitive organelles, indicating different strategies for handling cadmium exposure.
- The sole experienced more significant disruptions in essential metal balance and growth due to cadmium, suggesting that the differences in how each fish species processes cadmium may explain their varying sensitivities to its toxic effects.
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 (δC) and nitrogen (δN) in the muscle of 132 fish belonging to 23 different species from the Senegalese coast (West Africa), where the marine ecosystem is submitted to nutrient inputs from various sources such as upwelling or rivers.
View Article and Find Full Text PDFImpacted 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.
View Article and Find Full Text PDFThe 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.
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