temperature affected seven of the nine char- 

 acteristics measured. In general, temperature 

 exerted the major influence on the growth of 

 these animals; an increase in temperature 

 usually caused an increase in growth. 



The interaction between acute doses of radi- 

 ation and different salinities was followed by 

 observing changes in the metabolism of brine 

 shrimp, Artemia salina . Respiration rates and 

 Qjo's of 1-day-old nauplii were affected sig- 

 nificantly by radiation, the salinity of the 

 water, and the interaction between the two 

 factors. Respiration rates were measured in 

 salinities from 5 to 200 p.p.t. (parts per 

 thousand). Irradiated nauplii received doses of 

 cobalt 60 radiation of 10,000 to 80,000 rads. 

 In general, respiration rates of irradiated 



nauplii were significantly lower than those of 

 unirradiated nauplii at salinities of 5, 50, and 

 ZOO p.p.t., but were higher at 100 and 150 p.p.t. 

 When nauplii were in the highest salinity, 200 

 p.p.t., each increase in radiation above 10,000 

 rads caused a corresponding decrease in the 

 rate of respiration. Similarly, at each salinity 

 the nauplii exposed to the highest radiation 

 dose, 80,000 rads, had the lowest rate of 

 respiration. The highest levels of radiation and 

 salinity acted synergistically and depressed 

 the respiration rate to the lowest point. The 

 greatest effect on Qio's was at the highest 

 salinity. At this salinity, Qjq values for all 

 irradiated nauplii were significantly lower than 

 for controls or for irradiated nauplii at other 

 salinities. 



Staff 



Theodore R. Rice, Director 



Estuarine Ecology Program : 



Richard B. Williams J- . . Chief (Acting) 



John A. Baker, Jr Biological Aid 



Jo- Ann Lewis Do. 



Marianne B. Murdoch Biological Technician 



Biogeochemistry Program : 



Douglas A. Wolfe Chief 



Jeraldine H. Brooks Biological Aid 



Twyla A. Miner Physical Science Technician (resigned 



11-24-67) 



Pollution Studies Program : 



Thomas W. Duke Chief, Asst. Laboratory Director (transferred 



5-19-68) 



John P. Baptist Fishery Biologist 



Ford A. Cross Do. 



Donald E. Hoss Do. 



Charles D. Jennings Oceanographer 



Thomas J. Price Fishery Biologist 



James N. Willis, III Do. 



Curtis W. Lewis Biological Aid 



Ernest N. Petteway, Jr Do. 



(temporary) (resigned 9-1-67) 



Radiation Effects Program : 



Joseph W. Angelovic Chief 



David W. Engel Fishery Biologist 



John C. White, Jr Do. 



Edna M. Davis Biological Technician 



Staff Services : 



Peggy M. Keney Fishery Biologist 



Irene D. Huff Secretary (typing) 



Margaret L. Rose Clerk-Stenographer 



Thomas G. Roberts Biological Aid 



Gerald O. Godette Student Aid (temporary) 



Kenneth J. Fischler^ Fishery Biologist (Biometrician) 



Suzanne R. Hill^ Illustrator 



Granted educational leave. 



These employees, as well as the Administrative and Maintenance Personnel, are employedjolntly by the Biological and 

 Radiobiological Laboratories, Beaufon, N.C. 



