~145- AECD-3446 In the inactive areas the activity in the tissues did not differ in the herbiPlankton-feeding fish showedlittle or no Leepermpeenn anennen and carnivores to any great extent. Mduction in the amount of radioactivity. In averaging the data for the comparable During the summer of 1949, 369 fish were collected at Bikini, Eniwetok, ikiep Atolls in the Marshall Islands and their tissues analyzed for radioactive fopes. The resulting data appeared to warrant the following conclusions: 1, The amount of radioactive isotopes absorbed by fish near the bomb es at Eniwetok Atoll is about 120 times that of Likiep Atoll and inactive areas of shiwetok and Bikini Atolls. The amount of radioactive isotopes absorbed in the wwikini Atoll active areas is about 27 times that of Likiep. nev + 2, At Eniwetok the greatest amountof activity is concentrated in fish near Shot islands of Engebi-Aomon-Biijiri, and Runit. At Bikini the greatest amount activity is found in samples fromdeep water,~froimtarge fish, and from the ‘ 3. The greatest amount of activity is absorbed by herbivorous and omnivorfishes such as damsel fish (Pomacentridae), parrot fish (scaridae), and the These fish have about 10 times as much absorbed radioactive isotopes as C. carnivorous species as groupers (Serranidae), squirrel fisn (Holocentridae), Plankton-feeders, herring (Clupeidae) and silversides (Atherinidae) were Milar to carnivores in amounts absorbed. 4, Collection from control areas and from bombsite areas indicate that tural-occurring radioactive isotopes in fish livers are relatively scarce (as com- ed to other fish tissues) while radioactive isotopes resulting from fission are tively great. “7 UNIVERSrry UNIV, OF Woyers y ADerses : a ee t