wet Figure 1l shows the individual data calculated for 137¢, for all Rongela) residents and is referenced to June 1, 1957. The individual maxioum 137 Cs daily activity ingestion rate was approximately 4 times the population mean value. The standard deviation observed for the adult activity ingestion rate distribution was 41% of the mean value, 39% of the mean value for young adules, 48% for adolescents, 38% for children, and 54% ‘forinfants. Adolescents and infants al exhibited a broader distribution than adults’ while'children showed a fraction aA Ly cr . variation in ‘activity ingestion rate similar to that of aquiter, Breast feeding versus coconut sap supplements would have contributed to the greater variation observed in infants. Adolescente and young adults were the population subgroups which have been observed to move frequently between atojla. This wobility would lerd to greater variations in the daily activity ingestion rates relative to . those observed in the more stationary population subgroups. Figure 12 also exhibited g wave pattern; however, a distince difference be~ tween males and females was indicated. ey, This difference arose from the use of J vaiues for Ke listed in Table 3 which were derived from urine data for male and fezale residents at Rongelap Atoll. Its major impact was on the dose equivalent a rate, not on the total dose equivalent; and ita effect was to cause the dose a equivalent rate for males to rise and decline more rapidly than for females. of Figures 13a and 13b summarize the individual data for 905, for all Rongelap residents and were referenced to June 1, 1957. “aa <A bimodal shape waa observed for the distribuciona which contained both sexes, again reflecting (he , 90 . difference in the Sr dietary rate constants, . Data from urine bioassay indicated that the observed difference between the male and female valuee fo: Ve was not significant. A t-test was performed for consecutive urine measurement data during the 23 year residence interval. The results indicate that because 28 "FE eee omy ET ms AEP, CO RET er Hen sh