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Modalités de la contamination d'une chaîne trophique marine benthique par l'argent 110m. 2. Transfert du radionucléide dans la chaïne alimentaire = Concentration of silver 110m in a marine food chain. 2. Uptake through the food chain
Amiard, J.C. (1979). Modalités de la contamination d'une chaîne trophique marine benthique par l'argent 110m. 2. Transfert du radionucléide dans la chaïne alimentaire = Concentration of silver 110m in a marine food chain. 2. Uptake through the food chain. Cah. Biol. Mar. 20(2): 189-199
In: Cahiers de Biologie Marine. Station Biologique de Roscoff: Paris. ISSN 0007-9723; e-ISSN 2262-3094, more
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    Marine/Coastal
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  • Amiard, J.C.
Abstract
    The transfer of silver 110m through a natural marine food chain was studied experimentally. Silver 110m concentration decreased as the level in the productivity pyramid was higher and transfer factors between two successive trophic levels (f.t.) were low: 0.004 between Diatomae and Scrobiculariae, 0.128 between Scrobiculariae and crabs. However transfer factors between water and the trophic level considered (F.T.) were always above 1: 8.2 for Scrobiculariae, 1.04 for crabs. The mean percentage assimilated after each meal was 50% and 65% for Scrobiculariae and crabs respectively. Fecal excretion prevailed (26-28%). There did not seem to appear any regulation of silver 110m by the various species studied. Scrobiculariae and crabs retained 5% and 12% respectively of silver 110m supplied by all the meals.
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