300 Column legend oO 2 A Fe - mantle plus muscle > U | 100- ’ 50 > ob oO B "Fe = viscera 60 Cc Co - viscera Dp 6%po - mantle plus muscle = 8 5 3 c 7 es oP @ “0 2 ST = g Mean ; 40 . concentration 7] — a r) i r 4 J _ n | PE 7 D BELLE AIBICIDI JANET AIBICID Al BICIDI KATE WALT ALBICID GLENN alaiclo} HENRY ALBICID LEROY Collection site Fig. 164, Average 404 25 be and 806, concentration in the viscera, mantle, and muscle of Tridacna clams collected at Enewetak Atoll, October to December, 1972. The 49K value is the mean of all Tridacna samples. on the Atoll; of those that are, not all are The geographical distribution of Specimen collection sites is shown in available on every island. Fig. A total of 1103 specimens were col- 166 and the types of edible sample lected in the field as part of the terrestrial collected on each island are listed in biota survey, distributed as follows: Table 221, Soils 30 42 Plants 208 Birds 116 Eggs 217 Rats 249 Crabs 271 Total 1103 Sr and 13 Tos were observed in essentially all of the plant, rat, and crab Samples and in many of the bird and egg 35 60 239,240, samples, Fe, Co, and were observed less frequently, and isotopes such as 207 Bi, 192 bu, and 15lon were observed occasionally. II-28