Radioisotopes demonstrate the contrasting bioaccumulation capacities of heavy metals in embryonic stages of cephalopod species

Abstract : Cephalopods play a key role in many marine trophic food webs and also constitute alternative fishery resources in the context of the ongoing decline in finfish stocks. Most coastal cephalopod species of commercial importance migrate into shallow waters during the breeding season to lay their eggs, and are consequently subjected to coastal contamination. Eggs of common cuttlefish Sepia officinalis, European squid Loligo vulgaris, common octopus Octopus vulgaris and the sepiolid Rossia macrosoma were exposed during embryonic development to dissolved 110mAg, 109Cd, 60Co, 54Mn and 65Zn in order to determine their metal accumulation efficiencies and distribution among different egg compartments. Cuttlefish eggs, in which hard shells enclose the embryos, showed the lowest concentration factor (CF) values despite a longer duration of exposure. In contrast, octopus eggs, which are only protected by the chorionic membrane, accumulated the most metal. Uptake appears to be linked to the selective retention properties of the egg envelopes with respect to each element. The study also demonstrated that the octopus embryo accumulated 110mAg directly from the dissolved phase and also indirectly through assimilation of the contaminated yolk. These results raise questions regarding the potential contrasting vulnerability of early life stages of cephalopods to the metallic contamination of coastal waters.
Type de document :
Article dans une revue
PLoS ONE, Public Library of Science, 2011, 6 (11), pp.e27653. 〈10.1371/journal.pone.0027653〉
Liste complète des métadonnées

https://hal.archives-ouvertes.fr/hal-00645126
Contributeur : Paco Bustamante <>
Soumis le : samedi 26 novembre 2011 - 12:45:00
Dernière modification le : jeudi 7 février 2019 - 15:47:08
Document(s) archivé(s) le : lundi 27 février 2012 - 02:20:33

Fichier

Lacoue-Labarthe_et_al_PLoS_One...
Fichiers produits par l'(les) auteur(s)

Identifiants

Collections

Citation

Thomas Lacoue-Labarthe, Roger Villanueva, Claude Rouleau, François Oberhänsli, Jean-Louis Teyssié, et al.. Radioisotopes demonstrate the contrasting bioaccumulation capacities of heavy metals in embryonic stages of cephalopod species. PLoS ONE, Public Library of Science, 2011, 6 (11), pp.e27653. 〈10.1371/journal.pone.0027653〉. 〈hal-00645126〉

Partager

Métriques

Consultations de la notice

540

Téléchargements de fichiers

114