SharePoint
Aide
IRSN, Institut de radioprotection et de sûreté nucléaire

Search our site :

ok

Contact us :

ok
En Fr

Enhancing Nuclear Safety


Research

Publications

Effect of selenium exposure on the freshwater bivalve Corbicula fluminea

E. Fournier1, C. Adam1, J.C. Massabuau2 and J. Garnier-Laplace1
Radioprotection 2005, Vol. 40, n° Suppl. 1, pages S3 à S9
DOI: 10.1051/radiopro:2005s1-002

Document type > *Article de revue

Keywords > radiological protection, bivalve, ENVIRHOM (programme), selenium, toxicity

Research Unit > IRSN/DEI/SECRE/LRE

Authors > ADAM Christelle, GARNIER-LAPLACE Jacqueline

Publication Date > 01/06/2005

Summary

Selenium is essential for most of living organisms. In normoxic to moderately hypoxic freshwaters, Se exists predominantly in the (+VI) and (+IV) oxidation states as selenate and selenite respectively, whereas in the biota it is incorporated as Se (-II) or Se (0). At low concentrations, it acts against oxidative damages, but it may be toxic at higher levels. In filter feeders, such as the freshwater bivalve Corbicula fluminea, the ventilatory activity is a primary limiting step that controls the water influx and therefore the delivery of contaminants. A number of different parameters such as algal food density or presence of contaminant can influence the ventilation and hence the bioaccumulation potential of the contaminant. We report here a set of short-term experiments performed to study the effects of different forms of dissolved Se (selenite, selenate, selenomethionine) and algal-bound Se on the ventilatory activity of Corbicula fluminea and to evaluate the Se bioaccumulation. All experiments were performed on a 3-day exposure period after acclimatizing the organisms during a 7-day period to the synthetic water, at a regulated algal density. Both bioaccumulation and ventilatory activity of Se exposed groups, in comparison to these of the reference group, varied greatly according to the form of Se used.


1 Laboratoire de Radioécologie et d'Écotoxicologie, Institut de Radioprotection et de Sûreté Nucléaire, DEI/SECRE/LRE, Cadarache, Bât. 186, BP. 3, 13115 St-Paul-lez-Durance Cedex, France
2 UMR 5805, Laboratoire d'Écophysiologie et Écotoxicologie des Systémes Aquatiques, Université Bordeaux 1 et CNRS, Place du Dr. Peyneau, 33120 Arcachon, France


Close

Send to a friend

The information you provide in this page are single use only and will not be saved.
* Required fields

Recipient's email:*  

Sign with your name:* 

Type your email address:*   

Add a message :

Do you want to receive a copy of this email?

Send

Cancel

Close

WP_IMPRIMER_TITLE

WP_IMPRIMER_MESSAGE

Back

Ok