AYRES: You n@éan the concentration phenorena doesn't extend right up to the top? ~ WARREN: There isn't very much ingested with any one fish, 1s what he's saying, of the radioicdine because the thyroid is so sm@ll in terms of the body mass of the shark, AYRES: So peak concentration is featured in the lower forms then? BUSTAD: That's right, and they may destroy the thyroid or severely damage it and they shall be no radiojodine left by then, DONALDSON: Time competes with it, too. There's a big difference, The physi- tweet Ology of the shark is quite different that that of the bony fishes, wn AYRES : BUSTAD: of course, But we have to admit, I think, that mny of those fish that Boardman picked up down there relatively early manifested severe thyroid damage were- probably not a compromise from the standpoint of your cleanup squad. J mean he got there before the cleanup squad. DONALDSON: AYRES: Yes, Are there any turtles in the area? DONALDSON: Turtles are very secretive beasts. They just don't like people about. There are turtles there, true, and when the 4000 or the 5000 members of the test group descend on the place, the turties go somewhere else, AYRES: I see, DONALDSON: The turtles are back at Bikini now, and I hope we can see if the Chairman will allow us to take a look at what the place looks like now, S @ One thing I think we've left a little dangling in the discussion, Aa . t, You said the plankton whttr-the thiaawtt oe ED porta be ee a 3 diurnal variaticen_theve—trr. their iocation. ces,"oceur i ni the atolls where the depths may be 200 or 250 feet or there- *\) DOE/UCLA WARREN: = 2 2 a s oP vo