Accumulation and distribution of selenium in mussel and shrimp tissues
The tissue distribution of selenium in mussels and shrimp was examined and the bioaccumulation kinetics in the various tissues was elucidated with the aid of radio selenium. Mussels (Mytilus galloprovincialis) and shrimp (Lysmata seticaudata) collected near the Monaco port, were apportioned into several groups. One group of mussels and shrimp was maintained in sea water containing 0.8 ..mu..Ci/liter high specific activity Se-75. Three to four individuals were dissected and their tissues monitored for Se-75 content periodically. Another group of shrimp, maintained in flowing sea water, were fed ad libitum mussels that had previously accumulated Se-75 from sea water for several days. Shrimp were periodically dissected to follow tissue accumulation of ingested selenium. The highest concentrations of selenium were found in the exoskeleton, presumably due, in part, to the relatively large amount of isotope sorbed to its outer surface. Molts, cast by shrimp at various times throughout uptake, contained from 60 to 90% of the total Se-75 body burden. Direct uptake of water led to initially small fractions in internal tissues such as muscle and viscera compared to the relatively large fraction associated with the exoskeleton. With time percentages in internal tissues gradually increased relative to that in the exoskeleton. When Se-75 was accumulated through the food chain an opposite trend was noted with the Se-75 fraction in exoskeleton slowly increasing and that in viscera decreasing during the course of the experiment. All tissues examined readily accumulated the isotope and, in general, did not appear to have reached a steady state concentration after 63 days. The highest Se-75 concentrations were found in the visceral mass with lesser amounts in gills, muscle and mantle, in that order.
- OSTI ID:
- 7055584
- Journal Information:
- Bull. Environ. Contam. Toxicol.; (United States), Vol. 16:3
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
SELENIUM 75
BIOLOGICAL ACCUMULATION
BIOCHEMICAL REACTION KINETICS
EXOSKELETON
FOOD CHAINS
LABELLED COMPOUNDS
MOLLUSCS
SHRIMP
TISSUE DISTRIBUTION
ANIMALS
AQUATIC ORGANISMS
ARTHROPODS
BETA DECAY RADIOISOTOPES
BODY
CRUSTACEANS
DAYS LIVING RADIOISOTOPES
DISTRIBUTION
ELECTRON CAPTURE RADIOISOTOPES
EVEN-ODD NUCLEI
INTERMEDIATE MASS NUCLEI
INVERTEBRATES
ISOTOPES
KINETICS
NUCLEI
ORGANS
RADIOISOTOPES
REACTION KINETICS
SELENIUM ISOTOPES
SKELETON
560304* - Chemicals Metabolism & Toxicology- Invertebrates- (-1987)