table made up at least 95 percent of the total weight of the fish. Gills, glands, and nervous tissue were assumed to be similar in activity to bone, Analysis by Area. skin, and muscle. Comparisons of averages for entire fish indicate the greatest amountof radioactivity was in post shot -gamples collected at Engebi Island, followed by Bogallua, Aar- aanbiru, Rigili, Runit, Igurin and Japtan in descending order (Table 10 and Fig. 6). | | If the tissues are analyzed by stations a slightly different order is indicated. Activity in muscle is greatest at Bog- allua, followed by Engebi, Aaraanbiru, Rigili, Igurin, Japtan and Runit. The sequence is similar for the activity in bone, skin, and liver except for a shifting in the last four islands. Japtan generally appears to be lowest in activity with Igurin next lowest and Rigili and Runit alternating in position. The activity in the gut had 4 sequence similar to that of entire fish because the gut and contents were the greatest contributing factor. The greatest increase of radioactivity in post test fish over pre-shot levels was in the islands to the west and south of Elugelab where it was especially noticeable bone and liver. in muscle, skin, In spite of the fact that Bogallua fish had slightly less activity in the gut, several times as much activity appears in the liver, fish from Engebi. bone, skin and muscle as in post shot These data seem to indicate that the meta-~ bolized, and to some extent the adsorbed (onto the skin), radio- ~ 4G = yor ak cae HIVE