|SREL Reprint #0522|
The Accumulation and Elimination of Radiocesium by
Naturally Contaminated Wood Ducks
T. Fendley, M. N. Manlove and I. L. Brisbin, Jr.
The accumulation of radiocesium was studied in
hand-reared wood ducks which were released into a South Carolina swamp habitat
which had been contaminated with production reactor effluents.
The update of radiocesium by the ducks was described as:
1n pCi radiocesium/g live body weight=0l.36 + 0.18 (days).
There was no effect of sex on uptake rate.
The average estimated time required to attain practical equilibrium (0.90
Qc) was 17.3 days, with a range from 10.2 to 26.9 days.
Ducks which were recaptured after attaining equilibrium concentrations in
the field (averaging 16.6 pCi radiocesium/g live body weight) showed
single-component elimination-rate curves when confined in a semi-natural pen for
elimination studies. Radiocesium
elemination under penned conditions was described as:
1n % initial body burden = 4.60-0.13 (days).
Elimination-rate and body weight showed a negative linear correlation for
the penned birds although there was no effect of sex on loss-rate.
Radiocesium biological half-times for the penned ducks averaged 5.6 days
with a range from 3.2 to 9.3 days. Calculations
based on biological half-times determined from studies with the penned birds, were
successful in accurately predicting both the levels and rates of radiocesium
accumulation by free-living birds in the field.
SREL Reprint #0522
Fendley, T.T., M.N. Manlove, and I.L. Brisbin Jr. 1977.
The accumulation and elimination of radiocesium by naturally
contaminated wood ducks. Health Physics 32:415-422.