1499 



Price, K. S., M. R. Carriker, C. E. Epifanio, R. F. Srna, G. D. Pruder, 

 E. T. Bolton, and K. P. Smith. 1976. 



Mariculture in controlled environment seawater systems - A review of 

 research at the University of Delaware (1968-75) . FAO Tech. Conf . on 

 Aquaculture, JCyoto, Japan, 26 May- 2 June 1976. FAO Fish. Rept . 188: 89. 



A progress report on research accomplished. The paper by Price (Advances 

 in closed (recirculated) system mariculture - 1978) brings this up-to-date 

 and includes new information. - J.L.M. 



1500 



Price, T. J. 1963. 



Accumulation of radionuclides and the effects of radiation on molluscs. 

 In Ann. Rept. Bu. Comm. Fish. Biol. Lab., Beaufort, N.C. for fiscal year 

 ending June 30, 1961. U.S. Dept. Interior, Fish Wildl. Serv. , Bu. Comm. 

 Fish. Circ. 148: 31-32. 



Mercenaria mercenaria concentrated radioactive cobalt 43 times over amounts 

 in water in 47 days. Rate of loss of cobalt-60 was influenced by water temp. 

 Shells concentrated iron-59 and cerium-144 to higher levels than did meats. 

 Accumulation of cerium-144 was influenced by physical state of the isotope 

 in seawater. Most radioactivity was associated with particles on body 

 surfaces and their presence in organs and structures of the digestive system. 

 - J.L.M. 



1501 



Price, Thomas J. 1964. 



Accumulation of radionuclides and the effect of radiation on mollusks. In 

 Ann. Rept. Bu . Comm. Fish. Biol. Lab., Beaufort, N.C. for fiscal year ending 

 June 3o', 19S2. U.S. Dept. Interior, Fish Wildl. Serv., Bu. Comm. Fish. Circ. 

 134: 25. 



Estuarine mollusks are extremely susceptible to contamination from radioactive 

 material because they feed by filtering suspended matter from large volumes of 

 water passing over their gills. Mercenaria mercenaria lost cerium-144 rapidly 

 for the 1st 45 days, much more slowly thereafter. After 105 days, 20% of the 

 original radioactivity remained. Uptake of gold-199 by clams and separated 

 shells was rapid for the 1st 8 days, then diminished. At the end of the 

 experiment clams contained 3.6 times the amount of activity found on shells. 

 Clams in montmorillonite clay contained 38% less gold after 23 days than clams 

 in radioactive seawater. Clams accumulated zinc-65 more slowly per unit 

 weight than oysters. At 21 days the concentration factor in clams was' 40. 3, 

 in oysters 336.6. At that time, maximum uptake of zinc-65 had not been 

 reached. - J.L.M. 



1502 



Price, Thomas J. 1965. 



Accumulation and retention of radionuclides and the effects of external 

 radiation on mollusks. FWS Circ. 204: 10-14. 



Tanks were prepared with 10 yg Zn/liter and 6 ug Zn65, 100 yg Zn/liter and 

 60 ug Zn65, and 500 yg Zn/liter and 300 yg of Zn65. Uptake by Mercenaria 

 mercenaria was rapid initially, then fell off. The apparent steady state of 

 the radioactive content was reached much earlier in the tank with least con- 

 centration of Zn and Zn^5. Another series of tanks held the same amount o.f 

 stable Zn but varied amounts of Zn6 5, namely the same amounts as before, but 

 with 14.5 yg/liter of Zn. The uptake was essentially the same. Retention 

 was lost at roughly the same rate in all three groups, about half being lost 

 in 32 days. Zinc retention at high and low temps varied considerably. At 

 8° to 10° there was an initial loss of over 50% in the first 3 days, then 



419 



