Contrasting accumulation biokinetics and distribution of 241Am, Co, Cs, Mn and Zn during the whole development time of the eggs of the common cuttlefish, Sepia officinalis

Abstract : Cuttlefish eggs were exposed to 241Am, Co, Cs, Mn and Zn for different periods of time during the 50-d of the embryonic development at 17°C. Exposures were carried out using background dissolved concentrations of the metals, using the corresponding -emitting radiotracers (241Am, 57Co, 134Cs, 54Mn and 65Zn). Eggs were then placed in non-contaminating conditions. Experiments allowed assessing 1) the uptake and depuration kinetics of the selected elements and 2) their distribution among the different egg compartments (i.e. eggshell, vitellus, peri-vitelline fluid and embryo). 241Am, Co and Zn were accumulated continuously by the eggs all along the development time, whereas Mn reached saturation after one month of exposure. Interestingly, the uptake kinetics of Cs tightly followed the weight variation of the eggs, mainly because of water influx/outflux. During the first month of the embryonic life, 241Am, Co, Cs, Mn and Zn remained associated with the eggshell, indicating that the latter acted as an efficient shield against their penetration. Nevertheless, from this time onwards, Co, Cs, Mn and Zn accumulated more or less efficiently in the embryo according to the following order: Cs > Zn > Mn > Co. 241Am was the only element tested that did not cross the eggshell all along the exposure time. The depuration kinetics revealed that the retention capacity of the eggs varied during the embryonic life. The contrasting accumulation biokinetics are discussed in terms of chemical and biological processes occurring during the cuttlefish egg development.
Type de document :
Article dans une revue
Journal of Experimental Marine Biology and Ecology, Elsevier, 2010, 382 (2), pp.131-138. 〈10.1016/j.jembe.2009.10.008〉
Liste complète des métadonnées

Littérature citée [41 références]  Voir  Masquer  Télécharger

https://hal.archives-ouvertes.fr/hal-00445618
Contributeur : Paco Bustamante <>
Soumis le : dimanche 10 janvier 2010 - 14:31:45
Dernière modification le : jeudi 11 janvier 2018 - 06:23:34
Document(s) archivé(s) le : jeudi 17 juin 2010 - 22:35:13

Fichier

Lakwee_et_al_JEMBE_2010.pdf
Fichiers produits par l'(les) auteur(s)

Identifiants

Collections

Citation

Thomas Lacoue-Labarthe, Michel Warnau, François Oberhänsli, Jean-Louis Teyssié, Paco Bustamante. Contrasting accumulation biokinetics and distribution of 241Am, Co, Cs, Mn and Zn during the whole development time of the eggs of the common cuttlefish, Sepia officinalis. Journal of Experimental Marine Biology and Ecology, Elsevier, 2010, 382 (2), pp.131-138. 〈10.1016/j.jembe.2009.10.008〉. 〈hal-00445618〉

Partager

Métriques

Consultations de la notice

438

Téléchargements de fichiers

141