300 Column legend A 555, - mantle plus muscle ~< = 100- 2 50L U | 55 ~~Fe B - viscera 60 C ~"Co - viscera 60 D ““Co mantle plus muscle Mean 40 . “K concentration _ _ 2 ] £ 5 2 a 5 FL ~ 7 4 c pail 5 =2 5b i , ff — = 2 c 7] 7 + |- Ll 2 oO 3/- we r A} ICID BELLE AiBICiD JANET 4 | ALSICID KATE Al BICIDI WALT A{BIC{Di GLENN FABRIC ID HENRY ALBLCID LERCY Collection site . Fig. 164, Average 40 “K, 55 Fe, and 60 er , Co 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 available on every island, Specimen collection sites is shown in A total of 1103 specimens were col- Fig. 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 Plants 42 208 90s, and !37c5 were observed in essentially all of the plant, rat, and crab Eges 217 samples. Birds Rats 116 samples and in manyof the bird and egg Doe 8066, and 239, 2405, 249 were observed less frequently, and Crabs 271 isotopes such as 207 Bi, Seay, and Total 1103 1815 were observed occasionally. Ii-28