Toxicity studies of some pollutants from the Champagne-Ardenne area on a freshwater invertebrate: Lubriculus variegatus (Annelida, Oligochaeta)

Citation
I. Veltz-balatre, Toxicity studies of some pollutants from the Champagne-Ardenne area on a freshwater invertebrate: Lubriculus variegatus (Annelida, Oligochaeta), B S ZOOL FR, 125(4), 2000, pp. 333-341
Citations number
8
Language
FRANCESE
art.tipo
Article
Categorie Soggetti
Animal Sciences
Journal title
BULLETIN DE LA SOCIETE ZOOLOGIQUE DE FRANCE
ISSN journal
0037-962X → ACNP
Volume
125
Issue
4
Year of publication
2000
Pages
333 - 341
Database
ISI
SICI code
0037-962X(2000)125:4<333:TSOSPF>2.0.ZU;2-2
Abstract
The studies described here contribute to the toxicity studies of various me tallic contaminants (copper, lead and platinum) already or potentially pres ent in the wine producing environment of Champagne-Ardenne. We used as a te st organism a freshwater invertebrate Lumbriculus variegatus (Annelida, Oli gochaeta) which is widespread in this area. First, clear water worm biology was studied, especially asexual reproductio n and aptitude to cephalic regeneration (artificially induced) of this anim al which only reproduces itself by architomical scissiparity. Secondly, cop per, lead and platinum were tested alone or in mixtures on L. variegatus, w ith several approaches: bioconcentration, lethal toxicity and sublethal tox icity (which can perturb cephalic regeneration). Worms accumulate Cu, Pb an d Pt, which are very toxic for the annelid when tested separately. Toxicity clearly increased in mixture (synergy). The sublethal concentrations of th ose three metals induce a delay in cephalic regeneration while Pb, Pt and C u/Pb and Cu/Pt mixtures treatments can caused the formation of atypical reg eneration. Worms were affected by water samples from well known sites polluted with he avy metals of Champagne-Ardenne. Toxic concentrations are sublethal but suf ficient to induce hard cephalic regeneration perturbations. Worm cephalic r egeneration sensitivity to heavy metal pollution must be directly tested in the environment in order to qualify it as an ecotoxicological test.