CENTIMETERS Fig. 4.22 -—Autoradiograph of fish shown in Fig. 4.21. Activity is greatest in the surgeonfish, moderate in the butterfly, wrasse, and damselfish, and slight in the grouper and squirrelfish. Counts in disintegrations per minute per gram of the tissues of the surgeonfish were: muscle, 26,000; skin, 150,000; bone, 120,000; liver, 400,000; and gut, 6,800,000. Counts in the squirrelfish were: muscle, 10,000; skin, 31,000; bone, 16,000; liver, 30,000; and gut, 21,000. Autoradiograph was produced by an eight-day exposure, Jan. 6 to 14, 1953. 78