Accumulation of Iron-59 by Black-fish Girella punctata from Food Organisms

Abstract

The retention and excretion by black-fish Girella punctata, of ⁵⁹Fe taken up from seawater or food organisms were observed by tracer experiment. The highest concentration factor was shown by the seaweed, Enteromorpha sp. among the prey and predator organisms. In the uptake route of food, the contamination mode of food and food species had effect on the retention ratio of radionuclide, showing that ⁵⁹Fe assimilated in food was more difficult for the uptake than ⁵⁹Fe solution fed with food, and ⁵⁹Fe in seaweed is more difficult than ⁵⁹Fe in worm. The distribution ratio of radioiron in the body organ showed large distribution in digestive tract regardless of uptake route and contamination mode of food. GFC profile showed that the combining form of radioiron are same as in all organs.