l2 Table 3 Comparison of Shipboard and Laboratory Analyses for MFP d/min/g Ash Sample No. Type TANEY HASL 547 548 Tuna [ - Skin - White Muscle 0.2 94 Oto.5 3.640.6 549 550 553 - Red Muscle - Bone Tune II - Skin 132 6.2 7 3.40.6 1.1t0.5 0,5t0.5 568 - White Muscle 69 2.30.6 554 555 - Red Muscle - Bone -2.4 3.50.5 1.4+0.5 63 Shark - Cartilage 45 11¢0.5 158 567 Shark - Cartilage Remora - Entire 5 18 8t1.2 16+6.4 , Although the activity level was too low for accurate radiochemical analysis, the Sr?9 level in the edible portion was shown to be less than 2 percent of the permissible level for this isotope. This estimate of hazard is of course based on the fish as the only food intake. | The results obtained on individual tissues of fish taken on Troll upon analysis at the Applied Fisheries Laboratory are shown in Appendix]. The Troll fish collection included 19 flying fish, 6 shark, 3 yellowfin tuna and reef fishes from Truk, Guam, Douglas Reef and Okinawa. Invertebrates and algae were also collected with the reef fishes and on four occasions from floating objects at sea. Values in d/min/g(wet) for samples of these organisms and for comparable samples from other areas are also included in Appendix J. No correction has been made for potassium. The following conclusions were drawn from these data: l. Values for plankton, fish, invertebrates and algae were usually several to many times greater than comparable samples from Puget Sound, an area considered to be free of fission product contamination, Zz. The contamination was considerably less than at Bikini or Eniwetok, usually by a factor of 10 to 20 or greater. 3. Of the reef collections, the highest average values were obtained at Guam, the lowest at Okinawa, with Douglas Reef (Parece Vela) and Truk intermediate. HN nee ce Probe Measurements No significant measurements were made with the probe, since the activity levels encountered were generally below the sensitivity of the instrument. In addition, operational difficulties allowed use of the probe for only small portions of the track. These flaws in the experimental model can be corrected, and it is felt that the probe would be of considerable value in assessing sea water activity shortly after a detonation. Probe operations were complicated by the possibility of tangling if two cables were over the side at the same time. Therefore, the probe had to be brought on deck at each station and tow. This extra handling plus the relative fragility of the conducting cable required considerable time and resulted in many cable failures. Five men were required for the operation: one officer in phone contact with the bridge and engine room regulated course and speed to keep the probe clear of the