RADIONUCLIDES IN MARINE PROTEIN CONCENTRATES 820 Table 4.Daily intake of trace elements in adult human diets (after Bowen, Ref. 8) Daily intake Amount considered toxic (ug/day) Element (10g /day) Pb Ag Cd Cu Co Fe “tk 300-400 60-80 600 2000-5000 0.2 12,000-15,000 10,000-15,600 3000-9000 Mn measurements of the anchovy FPC should be viewed with some concern. Moreover concentrations of both radioactivity and trace elements might be expected to vary in any given species with both ume and location. It would scem prudent, nevertheless, to continue such measurements as a means of determining the suitability of any given marine organism for starting material in FPC production. Persistent and undesirable concentrations of these entities might then require process modifications for their removal. Acknowledgements—We thank Norman Brown of the National Center for Fish Protein Concentrate for kindly supplying the samples and C. W.Sill for his analysis of one of the concentrates. This research was supported by the U.S. Atomic Energy Commission, Contract No. AT (45-1) 2225 4h 14. REFERENCES i. B. H. Kercuum, In Global Effects of Environmental Pollution (edited by Sincrr, S. FRep), p. 190 Springer, New York (1970). 2. T.M. Hammonps and D. L. Carr, Tech. Rep. A. BE. Res. 321, Part IT and IL (Cornell University Agricutural Experiment Station, 1970). 3. T. M. Brasrey, C. L, Osrerpero and Y. M. Jones, Nature, Lond. 221, 1207 (1969). 4. H. E. Parmer and ‘T. M. Berasiey, Sevence, N.Y. 149, 431 (1965). 5. E. B. Sanpews., In: Colorimetric Determination of Traces of Metals (Edited by B. L. Grarxe, P. J. Evvinc and I. M. Kotruorr), p. 551, Interscience, New York (1959). 6. W. A. Ciemens and G. V. Wirpy,In Fishes of the Pelagic Coast of Canada (Edited by W. FE. Ricker, and N. M. Carter), p. 158 Fisheries Research Board of Canada, Ottawa (1961). 7. Yorra, Hreyugi and Oparr, Kazuxo, Bull. Tohoku Reg. Fish. Res. Lab. 7, 60 (1956). 8. G. L. ‘Ter Haar, R. B. Horrzman and H. F. Lucas, Jun., Nature, Lond, 216, 353 (1967). — 60,000 3000 250,000-500,006 500,000 — —_ —_ 9 L. V. SHannon, thesis, Univ. of Cape Town (1970), 10. L. V. Suannon, R. D. CHerry and M. J. OrREN, Geochim. ef Cosmochim. Acta 34, 701 (1970). 11. A. D. WELANDER, Private Communication, U. of Washington (1971). 12. H. J. M. Bowen, Trace Elements in Biochemistry. Academic Press, London (1966). 13. M. Tarsumoro and C. C. Patterson, In: Earth Science and Meteoritics (Edited by J. Geiss and E. D. Goiprrrs), 74 North-Holland, Amsterdam (1963). 14. T. J. CHow and C. C. Parrerson, Earth Planet. Set. Lett. 1, 397 (1966). 15. D. E. Ropertson, W. O. Forster, H. G. Rreck and J. C. Lancrorp, Tech. Rep. BNWL-715, Part 2 (Pacific Northwest Laboratory, 1968). 16. T. J. Cuow and J. L. Earr, Setence, N.Y. 169, 577 (1970). 17. E. D. Gotpnerc, In The Sea (Edited by M. N. Hix), 4 Interscicnce, New York (1963). 18. J. Maucuuine and W. L. TEemMpLeron, Oceanogr. Mar. Biol. Ann. Rev, 2, 229 (1964). 19. G. G. Portkarpov, In: Radioecology of Aquatic Organisms (Edited by V. SHutrz and A. W. KLEMENT, JUN.), p. 314 (North-Holland, Amsterdam (1966)). 20. Anonymous, FAO Fish. Bull. 7 (3), 122 (1954). 21. G. Donoso, M. Munoz, I. Barya, E. Duran, M. Urrea and J. V. Santa Maria, Nutr. Bromatol., Toxicol. 2, 75 (1963). 29. J. J. Dreyer and D. B. pu Bruyn, S. Afr. J. Nutr. 4, 26 (1968). 23, G. Pieters and S, DrJarcer, Ann. Soc. Belg. Med. Trop. 39, 181 (1959). 24. F. A. Toomson and E. Merry, Brit. J. Nutr. 16, 173 (1962). 25. R. B. Hourzman, Health Phys. 9, 385 (1963). 26. P. J. Macxo, P. R. Groutx and J. C. APIDIANKIS, Health Phys, 18, 383 (1970). 27, C. R. Hiri, Nature, Lond. 208, 423 (1965). S CHIVE Pee AR