cesium"' in marine fishes 



187 



5. Tissue distribution of Cs'" was similar in 

 oroaker (Micropogon undulatus), bluefish {Poma- 

 tnmus mltatrif), and little tuna {Euthynnus: 

 alleteratus) 24 hours following oral administration, 

 with highest tissue concentrations in the following 

 order: heart, liver, spleen, kidney, gills, gonad, 

 nuiscle, skin + scales, blood, and bone. 



6. Whole-body retention of Cs'" by postlarval 

 flounder was expressed as two rate functions with 

 biological half-lives [t^'s) of 5.3 and 36.9 days 

 representing 34 and 66 percent of the Cs'" at 

 zero time. 



7. Composite Cs'" retention curves of croaker 

 tissue were resolved into multiple rate functions 

 as follows: 



Skin — Three rate functions with t^'s of 6.2, 26.2, and 

 290.0 days representing 87, 10, and 3 percent of the 

 amount of Cs'" at zero time. 



Muscle — Two rate functions with ti^'s of 34.8 and 94.7 

 days, representing 35 and 61 percent of the amount of 

 Cs'" at zero time. 



Liver — Four rate functions with i<^'s of 0.7, 4.2, 24.1 

 and infinity representing 61, 37, 2, and 0.4 percent of the 

 amount of Cs'" at zero time. 



Gonad — Two rate functions with /^'s of 13.4 and 911.0 

 days representing 86 and 3 percent of the amount of 

 Cs'" at zero time. 



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U.S GOVERNMENT PRINTING OFFICE : 1962—0-624609 



