-97- AECD-3446 een tissue and between rats, but all rats showed someactivity, The highest sue count was in the bone, 1780 d/m/g, of the rat which also had the greatest nount of total body activity, 116 d/m/g, and was caught in an area with a very sh background count, as determined by field survey instruments. Three types of birds, all of which were terns (Fam. Laridae), also known Ngea swallows", were collected at Eniwetok on the islands of Igurin, Rigili, gon, and Runit, Within this family the fairy tern (Gygis alba), the white-capped ddy tern (Anous minutus), and the common noddy tern (Anous stolidus) were The three species of terns collected usually nest in areas having a sparse medium growth of ''Kilgin" or 'Beach Magnolia" (Scaevola) bushes. Thefairy does not build a nest but lays a single egg in the fork or on the broken end of nch, The white-capped noddy tern and the common noddy tern make a nest icks and coarse grass in the branches of bushes or small trees. The fairy rn, and to some extent the two species of noddy terns, usually remain close to he nesting area thus facilitating the collection of specimens, The amount of radioactivity found in the organs of these birds, whose diet ists mainly of fish, was small (see Table 2). The tendency of these forms to orage over a considerable area instead of confining themselves to one island, may. Apart, account for this, In those specimens collected, the liver contained detectable amounts of adioactivity more consistently than did the other organs. However, the amount 1% bund in the liver of a fairy tern at Igurin Island was equal to or greater than that ‘Hound in birds collected at the islands in close proximity to the Target Area. If the birds were picking up speck contamination with sand for the gizzard, ne would expect the counts in the proventriculus and gizzard to be relatively high. five specimens there was zero count and in two specimens only trace quantities rm 4 } UNERS UNI: OF ty eke eet