J, Mean 40k concentration 10 Column legend A 0c, - mantle plus muscle B 90. . r - viscera m C 239,240p, - mantle plus muscle ° D 2392405 viscera in T a — * © Oo — Ww Radionuclide concentrat ion in dry tissue — pCi/g 7 a 7 | i J 0.1 0.05 A ' T aS }] 0.03 0.01 AIBICID BELLE AJBICIDI JANET A rmyBICID KATE ALBICID WALT ALBICID GLENN AIBICID] HENRY al. |- p=yBICID LEROY Collection site Q Fig. 165. Average 9055 and 239, 2405, concentration in the viscera, mantle, and muscle of Tridacna clams collected at Enewetak Atoll, October to December, 1972, The 40 K value is the mean for a!] Tridacna samples, I-29