RESULTS AND DISCUSSION Collection information, such as island sampled, common and scientific names of fish, number of fish pooled per sample, sex, average whole body tie weights, and average lengths, is presented in the odd-numbered tables in Appendix. There is an odd-numbered table for fish for each collection period and a final odd-numbered table for invertebrates. Each of these tables is followed by an even-numbered table showing the radionuclide concentrations in the separated tissues and organs from the species collected. The and other organs radionuclides detected most frequently jn the muscle tissue , by gamma spectrometry included (in addition to naturally occurring 40K) 137¢s 60co, and 207Bi. Occasionally the radionuclides 155eu, 24lam, 125sb, '08mAg, l02mgh, and '13mcg were also detected (by gamma spectrometry) in the viscera, liver, or stomach (gizzard) content samples of fish collected from the more contaminated regions of the atoll. The concentrations of the transuranics and other radionuclides in tissues and organs analyzed by wet chemical methods are also listed. The locations of the istands sampled (island locator letter and number) are shown in Fig. 1. All concentrations are listed relative to dry weight, but the dry/wet weight ratios provided may be applied to convert concentrations to a wet-weight basis. Representative whole fish concentrations of several reconstructed from the tissue and organ radionuclides were concentration data, and the percentages of the respective tissues to whole body weight are given in Table 4 for species representing three trophic levels (surgeonfish, mullet, trophic level II; goatfish, trophic level III: snapper, collected from different islands of the atoll in 1978. trophic level IV) These values were used to compute the percent of the whole body activity associated with respective tissues. the The results from these calculations are shown in Table 6 and are discussed in the following sections. CESTUM-137 IN FISH The results in Table 6 show that most 137cs accumulated by fish from the atoll is found associated with the edible flesh: the lowest percentages are associated with bone or liver. Concentrations of '37cs in the flesh of all four species are approximately equivalent to the concentration in the reconstructed whole body. 5900565 There is no straightforward relationship between 4