Should apple snail Pomacea canaliculata (CAENOGASTROPODA, AMPULLARIIDAE) be used as bioindicator for BDE-209?

KOCH E; ALTAMIRANO, JORGELINA; COVACI, ADRIAN; LANA, BELEN; CIOCCO, NÉSTOR

ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH

SPRINGER HEIDELBERG

Lugar: HEIDELBERG; Año: 2014 vol. 21 p. 761 - 765

0944-1344

Abstract Apple snail Pomacea canaliculata has been report- ed to accumulate polybrominated diphenyl ethers (PBDEs) and was recently proposed as PBDE bioindicator. This work inves- tigates the ability of P. canaliculata to accumulate BDE-209 by dietary exposure under controlled experimental conditions. A 30-day long enrichment feeding assay was carried out using 30 adult apple snails, placed in individual aquaria. Food was enriched at three BDE-209 concentrations (400, 4,700, and 8,300 μg g−1 lipid weight). Correlation between BDE-209 values in food and snail tissue were estimated according to Stockholm Convention suggested criteria for chemicals with KOW >5. All animals survived with no evident physical alter- ations, and all of them accumulated BDE-209. BDE-209 levels in tissue samples increased exponentially with the exposure concentration. The bioaccumulation factor vs. food concentra- tion plot showed a peculiar pattern, in which at intermediate concentrations the snails accumulated less BDE-209 than expected. Our results suggest that P. canaliculata would pres- ent a detoxification mechanism for BDE-209 different from the most commonly reported metabolic pathways.