Uptake of cadmium from a dietary and soluble source by the crustacean Daphnia magna
Daphnia were exposed to radioactively labeled cadmium in solution and in the presence of Chlorella which had been preloaded with the metal to varying extents. Illuminated algal cells retained the cadmium and greatly reduced its availability to the daphnids. Autoradiographic evidence was obtained which implicated the exoskeleton as a major sink for the cadmium taken up from solution. Cadmium in solution at a concentration close to the 48 hr LC/sub 50/ level did not affect respiration during the first 6 hr of exposure. Retention patterns were similar, regardless of the source of cadmium, but ecdysis resulted in a considerable loss of body burden provided that this had been acquired via a predominantly soluble route.
- Research Organization:
- Bristol Polytechnic, England
- OSTI ID:
- 5858578
- Journal Information:
- Environ. Res.; (United States), Vol. 39:2
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
59 BASIC BIOLOGICAL SCIENCES
CADMIUM
AUTORADIOGRAPHY
BIOLOGICAL AVAILABILITY
BIOLOGICAL LOCALIZATION
RETENTION
UPTAKE
AQUEOUS SOLUTIONS
BODY BURDEN
CHLORELLA
DAPHNIA
DIET
RESPIRATION
SOLUBILITY
ALGAE
ANIMALS
AQUATIC ORGANISMS
ARTHROPODS
BRANCHIOPODS
CRUSTACEANS
DISPERSIONS
ELEMENTS
INVERTEBRATES
METALS
MICROORGANISMS
MIXTURES
PLANTS
SOLUTIONS
UNICELLULAR ALGAE
560304* - Chemicals Metabolism & Toxicology- Invertebrates- (-1987)
550501 - Metabolism- Tracer Techniques