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Utilisation d'une chaine trophique expérimentale pour l'étude du transfert 60Co
Kirchmann, R.; Bonotto, S.; Bossus, A.; Nuyts, G.; Declerck, R.; Cantillon, G. (1977). Utilisation d'une chaine trophique expérimentale pour l'étude du transfert 60Co. Rev. Int. Océanogr. Méd. XLVIII: 117-124
In: Revue Internationale d'Océanographie Médicale. Centre d'études et de recherches de biologie et d'océanographie médicale: Nice. ISSN 0035-3493, more

Available in Authors 
    VLIZ: Open Repository 282525 [ OMA ]

Keywords
    Bioaccumulation; Food chains; Radioactive contamination; Radioisotopes; Acetabularia mediterranea J.V.Lamouroux, 1816 [WoRMS]; Carcinus Leach, 1814 [WoRMS]; Mytilus edulis Linnaeus, 1758 [WoRMS]; Marine

Authors  Top 
  • Kirchmann, R.
  • Bonotto, S.
  • Bossus, A.
  • Nuyts, G.
  • Declerck, R.
  • Cantillon, G.

Abstract
    The utilization of an experimental food chain permits a study of the impact of the radioactive pollution on the marine environment. The chain is constituted by unicellular algae (Dunaliella bioculata or Acetabularia mediterranea), a filter feeding organism (Mytilus edulis) and a carnivore (Carcinus maenas). It was found that 60Co is mostly concentrated (at least 100 times) at the level of the primary producers. Under laboratory conditions, the primary consumer (Mytilus) concentrates about 20 times the 60Co, when this radionuclide is bound to Dunaliella cells or to Acetabularia chloroplasts. However, 50-70% of the 60Co are rapidly (48 h) lost when the mussels are transferred to normal sea water. After 2 weeks, only 10% of the initial radioactivity is present in the mussels. After a single meal (6 h), the secondary consumer (Carcinus) ingested an important part (about 30%) of the radioactive food. By transfer into normal sea water, the radioactivity in the crabs progressively decreases. These results underline the importance of 60Co for health protection.

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