|Influence of food quantity on the kinetics of cadmium uptake and loss via food and seawater in Mytilus edulis|
Borchardt, T. (1983). Influence of food quantity on the kinetics of cadmium uptake and loss via food and seawater in Mytilus edulis. Mar. Biol. (Berl.) 76: 67-76
In: Marine Biology. Springer: Heidelberg; Berlin. ISSN 0025-3162, more
Bioaccumulation; Cadmium; Comparison; Food; Sea water; Toxicity; Toxicology; Mytilus edulis Linnaeus, 1758 [WoRMS]; Marine
The difference between the cadmium uptake via food and seawater in Mytilus edulis has been studied. Mussels were fed on six different quantities of Isochrysis galbana. Cadmium uptake via algae was more efficient at low food levels, while accumulation from seawater was linearly correlated with food quantities. Cadmium from food contributed only little to the body burden (0.2-0.5%). Half-lives for the elimination of cadmium ranged from 96-190 d and increased with decreasing availability of algae, presumably due to slowed down metabolism. Differences in elimination patterns suggest a release of both isotopes from different storage depots. A computer model shows that the food pathway can only play a significant role if algae are highly contaminated. It also demonstrates the paradox that in long-term studies the highest contribution of food-derived cadmium to the body burden must be expected near maintenance food concentrations.