Table 1. Gross levels of beta radioactivity in reef fishes collected at Rongelap and Ailinginae Atolls, July 1957, expressed as uc/kg wet tissue* Collection date and Locality 7/11/57 Ailinginae Atoll Enibuk I. Common name Number of specimens Reef fish 32 Reef fish 51 Grouper (Plectropomus Muscle Bone 038 Liver Stomach content Whole fish .163 030 1 036 .100 26 .016 .022 .059 .026 ey .018 .020 068 063 leopardus) T/17/57 Rongelap Atoll Rongelap I. 7/18/57 Rongelap Atoll — 5 Kabelie I. ~ | o = 4 yy. Reef fish carnivores) Reef fish omnivores) Reef fish 73 Reef fish 11 Reef fish 36 Goatfish 14 .036 ~f27 370 Halfbeak 50 .016 .080 .038 _ (Mulloidichthys samoensis } Hyporhamphus Inticeps) *Counts were made during August 1957. .028 .027 .102 .276 8.125 O89