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Assimilation, inter-organ transfer and excretion of americium in two teleost fish

Assimilation, inter-organ transfer and excretion of americium in two teleost fish 227 77 77 1 1 F. P. Carvalho S. W. Fowler J. La Rosa International Laboratory of Marine Radioactivity Musée Océanographique MC-98000 Monaco Department of Protection and Radiological Safety National Laboratory of Engineering and Industrial Technology (LNETI) Estrada Nacional 10 P-2685 Sacavém Portugal Abstract Radiotracer experiments were performed (February–April, 1982) to study the assimilation and metabolism of the transuranium nuclide americium-241 in the marine teleosts Serranus scriba (Linnaeus, 1758) and Scorpaena notata Rafinesque, 1810, caught off the Monaco coast. Fish fed with 241 Am-labelled food showed that assimilation of this radionuclide takes place through the gastrointestinal walls and that the small fraction accumulated is incorporated mainly in the skin, muscle and skeleton. Gut-transfer coefficients were similar in both species and averaged 0.7% (range 0.1 to 1.7%) of the ingested activity. The calculated biological half-lives for loss of the absorbed fraction ranged between 49 and 61 d for Serranus scriba and 12 and 117 d for Scorpaena notata . Results from an intramuscular injection experiment indicated that 241 Am was retained mainly in the liver, skin and skeleton; the fraction accumulated by muscle was very low. Liver displayed a relatively short biological half-time for 241 Am loss of roughly 24 d. Routes of 241 Am excretion from the teleosts appear to be through the kidneys, gills and feces with bile serving as a possible excretion route from the liver. From the limited amount of published information available for comparison, experimental evidence is presented which suggests that 241 Am taken up via the food chain is more biologically available to marine fish than is plutonium. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Marine Biology Springer Journals

Assimilation, inter-organ transfer and excretion of americium in two teleost fish

Marine Biology , Volume 77 (1) – Nov 1, 1983

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References (17)

Publisher
Springer Journals
Copyright
Copyright © 1983 by Springer-Verlag
Subject
Life Sciences; Biomedicine general; Oceanography; Ecology; Microbiology; Zoology
ISSN
0025-3162
eISSN
1432-1793
DOI
10.1007/BF00393210
Publisher site
See Article on Publisher Site

Abstract

227 77 77 1 1 F. P. Carvalho S. W. Fowler J. La Rosa International Laboratory of Marine Radioactivity Musée Océanographique MC-98000 Monaco Department of Protection and Radiological Safety National Laboratory of Engineering and Industrial Technology (LNETI) Estrada Nacional 10 P-2685 Sacavém Portugal Abstract Radiotracer experiments were performed (February–April, 1982) to study the assimilation and metabolism of the transuranium nuclide americium-241 in the marine teleosts Serranus scriba (Linnaeus, 1758) and Scorpaena notata Rafinesque, 1810, caught off the Monaco coast. Fish fed with 241 Am-labelled food showed that assimilation of this radionuclide takes place through the gastrointestinal walls and that the small fraction accumulated is incorporated mainly in the skin, muscle and skeleton. Gut-transfer coefficients were similar in both species and averaged 0.7% (range 0.1 to 1.7%) of the ingested activity. The calculated biological half-lives for loss of the absorbed fraction ranged between 49 and 61 d for Serranus scriba and 12 and 117 d for Scorpaena notata . Results from an intramuscular injection experiment indicated that 241 Am was retained mainly in the liver, skin and skeleton; the fraction accumulated by muscle was very low. Liver displayed a relatively short biological half-time for 241 Am loss of roughly 24 d. Routes of 241 Am excretion from the teleosts appear to be through the kidneys, gills and feces with bile serving as a possible excretion route from the liver. From the limited amount of published information available for comparison, experimental evidence is presented which suggests that 241 Am taken up via the food chain is more biologically available to marine fish than is plutonium.

Journal

Marine BiologySpringer Journals

Published: Nov 1, 1983

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