Pacific Science Volume 38, Number 4, 1984

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Pacific Science is a quarterly publication devoted to the biological and physical sciences of the Pacific Region.


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    38: Index - Pacific Science
    (University of Hawai'i Press, 1984)
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    38:4 Table of Contents - Pacific Science
    (University of Hawai'i Press, 1984-10)
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    Concentrations of 207Bi and 210Pb-210Bi-210Po Disequilibrium in Fish
    (University of Hawai'i Press, 1984-10) Noshkin, V.E. ; Wong, K.M. ; Eagle, R.J. ; Jokela, T.A.
    Radioactive 207Bi, produced during nuclear testing at the Pacific Proving Grounds, concentrates in the muscle tissue and organs of goatfish and certain pelagic lagoon fish from Bikini and Enewetak Atolls. It is reasonable to expect that fish capable of accumulating 207Bi could also be efficient accumulators of other bismuth isotopes-namely 210Bi, the daughter of naturally occurring 210Pb. Therefore, 210Bi and consequently 210Po, the decay product of 210Bi, would be expected in notable excess over the precursor 210Pb in specific tissues. To test this assumption, we compared concentrations of 210Pb, 210Bi, and 210POin muscle, liver , and bone separated from some reef species from the Marshall Islands. Concentrations of 210Bi in muscle and liver were found to exceed those of its precursor by factors of2 to 15. The excess 210Bi in some species, however , is not from the environmental sources (either food or water) from which 207Bi is derived. The data suggest that the excess 210Bi may be translocated to muscle and liver tissue following the decay of 210Pb in bone.
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    Trace Metals in the Columbia River Estuary Following the 18 May 1980 Eruption of Mount St. Helens
    (University of Hawai'i Press, 1984-10) Riedel, Gerhardt ; Wilson, Stephanie L. ; Holton, R.L.
    Dissolved and suspended concentrations of cadmium, copper, iron, manganese, nickel, lead, and zinc were measured in the Columbia River Estuary following the 18 May 1980 eruption of Mount St. Helens. Soluble concentrations of these trace elements were not substantially elevated by the influx of volcanic ash and mud into the estuary during this period, except for somewhat higher than usual concentrations of manganese and copper. A laboratory experiment indicates that manganese leached from volcanic debris in fresh water and in the transition from fresh to slightly saline water probably caused the elevated Mn concentrations. Copper in solution may also have been enhanced slightly by leaching from the material into fresh water.
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