RADIOACTIVITY IN THE REEF FISHES OF BELLE ISLAND, ENIWETOK ATOLL, APRIL 1954 TO NOVEMBER 1955 Introduction Previous studies of the radioactivity in the fishes in the Marshall Islands have been confined to single surveys made soon after an atomic detonation, occasionally followed by one to three resurveys a few months up to three years later (UWFL-7, UWFL-16, UWFL-19, UWFL-23, WT-616 (UWFL-33), and UWFL-43 ). Trends in the levels or decline of radioactivity in the fish populations could only be estimated by basing assumptions on physical decay. The purpose of this investigation was to measure the trend or decline of radtoactivity in the fish, in different species, to compare the decline in some of the organs or tissues, and in the environment and to compare the decline with the physical decay of radioactivity. Materials and Methods Continuous, sequential studies of the amounts of radioactivity in the reef fishes of Belle (Bogombogo) Island, Eniwetok Atoll, were made from April 14, 1954, through November 1, 1955, during and after the weapons testing program at Eniwetok and Bikini Atolls. important The Nectar shot of May 14, 1954, was the most in these studies, since the detonation occurred but

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