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Exposure of the marine deposit feeder Hydrobia ulvae to sediment associated LAS
Mauffret, A.; Rico-Rico, A.; Temara, A.; Blasco, J. (2010). Exposure of the marine deposit feeder Hydrobia ulvae to sediment associated LAS. Environ. Pollut. 158(2): 529-535. dx.doi.org/10.1016/j.envpol.2009.08.013
In: Environmental Pollution. Elsevier: Barking. ISSN 0269-7491, more
Peer reviewed article  

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Keywords
    Hydrobia ulvae (Pennant, 1777) [WoRMS]; Mollusca [WoRMS]; Marine
Author keywords
    Bioavailability; Deposit feeder; Marine mollusc; H. ulvae; LAS

Authors  Top 
  • Mauffret, A.
  • Rico-Rico, A.
  • Temara, A., more
  • Blasco, J.

Abstract
    Linear Alkylbenzene Sulfonates (LAS) effects (mortality, egestion rate, behaviour) on the marine deposit feeder Hydrobia ulvae were assessed in whole-sediment and water-only systems. The results were combined with a bioenergetic-based kinetic model of exposure pathways to account for the observed toxicity. The 10-d LC50 value based on the freely dissolved fraction was 9.3 times lower in spiked sediment (0.152 ± 0.001 (95% CI) mg/L) than in water-only (1.390 ± 0.020 (95% CI) mg/L). Consequently, the actual 10-d LC50 value (208 mg/kg) was overestimated by the Equilibrium Partitioning calculation (1629 mg/kg). This suggests that the sediment associated LAS fraction was bioavailable to the snails. It could also be due to modifications in physiological parameters in absence of sediment, the organism natural substrate.

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