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Annual report to the Atomic Energy Commission, 1963
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1963
[PDF-34.90 MB]
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Alternative Title:Radiobiological Laboratory annual report to the Atomic Energy Commission : a cooperative agreement between the Bureau of Commercial Fisheries and the Atomic Energy Commission
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Description:The research program of the Radiobiological Laboratory emphasizes the experimental approach and includes three areas of field and laboratory studies: (1) Experimental Environments. The cycling of elements through the components of marine communities is being observed in large tanks. This yields more realistic accumulation rates, levels of concentration, and retention times for algae, crabs, oysters, fish, and sediments than conventional laboratory methods. By using gamma emitting radionuclides and a detector with a large chamber, live animals and other samples are removed from the tanks or ponds, measured for radioactivity, and then returned to the experiment for further observation. Some isotopes used include Zn65, Fe59, and Au198. (2) Estuarine Radioecology. The productivity and food relationships of estuarine organisms are being studied. Environmental radioactivity in marine organisms is being measured to establish base lines for existing levels and to determine ecological relationships. Also, in cooperation with the Corps of Engineers on a study of sediment movements, the accumulation of Au198 by organisms was determined after the release of Au198-labeled sediments. Levels of accumulation were much less than MPC levels. (3) Radiation Effects. The effects of irradiation on marine organisms are being studied with both external and internal sources. Quantities of radiation required to kill one-half of the animals irradiated (LD50) have been determined for clams, oysters, and post-larval flounders. The effects of radiation on the physiology of blood, egg hatching, larval development, growth, and meristic characteristics have been studied for several species of fish. Data on these three areas are being integrated so that assessments can be made concerning the potential hazards of radioactivity in marine ecosystems to marine organisms and to man.
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Rights Information:CC0 Public Domain
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Compliance:Library
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