Native (Ruditapes decussatus) and non-indigenous (R. philippinarum) shellfish species living in sympatry: Comparison of regulated and non-regulated biotoxins accumulation

Abstract

The native Ruditapes decussatus and the non-indigenous Ruditapes philippinarum are an important target of shellfish industries. The aim of this study was to compare an invader with a native species living in sympatry in the view of marine biotoxins accumulation. Samples were analysed for regulated and non regulated biotoxins. The consistently occurrence of okadaic acid-group toxins and BMAA, may cause human health problems and economical losses. A strong positive relationship was observed between species, with significantly higher DSP toxicity in R. decussatus. Similar toxin profiles dominated by DTX3 in both species suggests similar metabolic pathways. Lower DSP toxicity in R. philippinarum may favour their cultivation, but a tendency for higher levels of the non-regulated BMAA was observed, indicating risks for consumers that are not monitored. This study highlights the need to better understand the physiological responses and adaptations allowing similar species exposed to the same conditions to present different toxicity levels. (C) 2017 Elsevier Ltd. All rights reserved.

Keywords

Okadaic acid; BMAA; Dinophysistoxins; Tetrodotoxin; Diarrhetic shellfish poisoning

Published in

Marine Environmental Research
2017, Volume: 129, pages: 147-155
Publisher: ELSEVIER SCI LTD

UKÄ Subject classification

Analytical Chemistry
Food Science
Ecology


Publication identifier

DOI: https://doi.org/10.1016/j.marenvres.2017.05.002

Permanent link to this page (URI)

https://res.slu.se/id/publ/87586