Beirão, José; Baillon, Lucie; Litt, Margaret A.; Langlois, Valérie S. 
ORCID: https://orcid.org/0000-0003-4031-6838 et Purchase, Craig F.
(2019).
Impact of crude oil and the dispersant Corexit™ EC9500A on capelin (Mallotus villosus) embryo development.
Marine Environmental Research
, vol. 147
.
pp. 90-100.
DOI: 10.1016/j.marenvres.2019.04.004.
Résumé
Marine food webs are particularly vulnerable to oil spills if keystone species are impacted. To quantify lethal and sublethal toxicity in a key Holarctic forage fish, capelin embryos were exposed to Hibernia crude oil water accommodated fraction (WAF) produced at an oil-to-water ratio of 1:9 (v:v) and chemically-enhanced WAF (CEWAF) produced with the dispersant Corexit™ EC9500A at a dispersant-to-oil ratio of 1:10 (CEWAF H) or 1:50 (CEWAF L). Corexit alone yielded similar embryotoxicity to CEWAF. 10% CEWAF H, with total polycyclic aromatic hydrocarbons of 99.2 μg/L, decreased embryo survival following 10 h of exposure, while continual exposed to 1% CEWAF L decreased hatching and heart rates. Concentrations down to 0.1% CEWAF L increased in a dose-dependent manner the transcript level of cytochrome P4501a1 (cyp1a1) in hatched larvae. These data indicate that embryo-larval survival of capelin is likely at risk if an oil spill coincides in space and time with spawning.
| Type de document: | Article |
|---|---|
| Mots-clés libres: | ecotoxicology; petroleum hydrocarbons; polycyclic aromatic hydrocarbons; oil spill |
| Centre: | Centre Eau Terre Environnement |
| Date de dépôt: | 04 déc. 2019 15:14 |
| Dernière modification: | 10 févr. 2022 21:28 |
| URI: | https://espace.inrs.ca/id/eprint/9626 |
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