Effects of chronic exposure to the water-soluble fraction of crude oil and in situ burn residue of oil on egg-bearing Northern shrimp (Pandalus borealis)

Oil spill clean-up measures using in situ burning can potentially result in seafloor contamination affecting benthic organisms. To mimic realistic exposure and measure effects, ovigerous Northern shrimp were continuously exposed for two weeks to the water-soluble fraction of oil coated on gravel fol...

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Bibliographic Details
Published in:Ecotoxicology and Environmental Safety
Main Authors: Frederike Keitel-Gröner, Shaw Bamber, Renée K. Bechmann, Emily Lyng, Alessio Gomiero, Valentina Tronci, Naouel Gharbi, Frode Engen, Ingrid C. Taban, Thierry Baussant
Format: Article in Journal/Newspaper
Language:English
Published: Elsevier 2021
Subjects:
In situ burning
Crustacean
Bioaccumulation
Gill histopathology
Locomotory activity
Larval development
envir
geo
northern shrimp
Pandalus borealis
Online Access:https://doi.org/10.1016/j.ecoenv.2021.113013
https://doaj.org/article/52ae8eeaecce456fbe64d6ca175462ca
Description
Summary:Oil spill clean-up measures using in situ burning can potentially result in seafloor contamination affecting benthic organisms. To mimic realistic exposure and measure effects, ovigerous Northern shrimp were continuously exposed for two weeks to the water-soluble fraction of oil coated on gravel followed by two weeks in clean seawater. North Sea crude oil (NSC) and field generated in situ burn residue (ISBR) of NSC were used (Low: 3 g/kg gravel, Medium: 6 g/kg gravel and High: 12 g/kg gravel). The concentrations of polyaromatic hydrocarbons (PAHs) in the water resulting from NSC were higher compared to ISBR. No mortality was observed in any treatment and overall moderate sublethal effects were found, mostly after exposure to NSC. Feeding was temporarily reduced at higher concentrations of NSC. PAH levels in hepatopancreas tissue were significantly elevated following exposure and still significantly higher at the end of the experiment in NSCHigh and ISBRHigh compared to control. Mild inflammatory response reactions and tissue ultrastructural alterations in gill tissue were observed in both treatments. Signs of necrosis occurred in ISBRHigh. No change in shrimp locomotory activity was noted from NSC exposure. However, ISBR exposure increased activity temporarily. Larvae exposed as pleopod-attached embryos showed significant delay in development from stage I to stage II after exposure to NSCHigh. Based on this study, oil-contaminated seafloor resulting from in situ burning clean-up actions does not appear to cause serious effects on bottom-living shrimp.

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