The impact of exposure timing on embryo mortality and the partitioning of PAHs when cod eggs are exposed to dispersed and dissolved crude oil
During sub-sea oil spills to the marine environment, oil droplets will rise towards the sea surface at a rate determined by their density and diameter as well as the vertical turbulence in the water. Micro-droplets (< 50 µm) are expected to have prolonged residence times in the water column. If p...
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ftsintef:oai:sintef.brage.unit.no:11250/3016530 2023-05-15T15:27:45+02:00 The impact of exposure timing on embryo mortality and the partitioning of PAHs when cod eggs are exposed to dispersed and dissolved crude oil Nordtug, Trond Olsen, Anders Johny Wold, Per-Arvid Salaberria, Iurgi Øverjordet, Ida Beathe Altin, Dag Kjørsvik, Elin Hansen, Bjørn Henrik 2022 application/pdf https://hdl.handle.net/11250/3016530 https://doi.org/10.1016/j.ecoenv.2021.113100 eng eng Elsevier Ecotoxicology and Environmental Safety. 2022, 229 . urn:issn:0147-6513 https://hdl.handle.net/11250/3016530 https://doi.org/10.1016/j.ecoenv.2021.113100 cristin:1970316 Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no © 2021 The Authors. Published by Elsevier Inc. CC-BY 9 229 Ecotoxicology and Environmental Safety 113100 Adhesion Pelagic eggs Ecotoxicity Oil droplets Subsurface oil spills Petroleum Peer reviewed Journal article 2022 ftsintef https://doi.org/10.1016/j.ecoenv.2021.113100 2022-09-14T22:42:14Z During sub-sea oil spills to the marine environment, oil droplets will rise towards the sea surface at a rate determined by their density and diameter as well as the vertical turbulence in the water. Micro-droplets (< 50 µm) are expected to have prolonged residence times in the water column. If present, pelagic fish eggs may thus be exposed to dispersed oil from subsurface oil spills for days, and the contribution of these micro-droplets to toxicity is not well known. The purpose of this work was to investigate to what extent timing of exposure and the presence of oil micro droplets affects PAH uptake and survival of pelagic Atlantic cod eggs. A single batch of eggs was separated in two groups and exposed to dispersions and corresponding water-soluble fraction at 3–7 days (Early exposure) and 9–13 days (Late exposure) post fertilization. Partitioning of PAHs between crude oil microdroplets, water and eggs was estimated as well as the contribution of oil droplets to PAH body residue and acute and delayed mortality. Timing of oil exposure clearly affects both the mortality rate and the timing of mortality. Even though the body residue of PAHs were lower when embryos were exposed in the later embryonic stage, mortality rate increased relative to the early exposure indicating that critical body residue threshold is stage specific. Although our results suggest that the dissolved fraction is the dominating driver for toxicity in cod embryos exposed to oil dispersions, crude oil micro droplets contribute to increased mortality as well. publishedVersion Article in Journal/Newspaper atlantic cod SINTEF Open (Brage) Ecotoxicology and Environmental Safety 229 113100 |
institution |
Open Polar |
collection |
SINTEF Open (Brage) |
op_collection_id |
ftsintef |
language |
English |
topic |
Adhesion Pelagic eggs Ecotoxicity Oil droplets Subsurface oil spills Petroleum |
spellingShingle |
Adhesion Pelagic eggs Ecotoxicity Oil droplets Subsurface oil spills Petroleum Nordtug, Trond Olsen, Anders Johny Wold, Per-Arvid Salaberria, Iurgi Øverjordet, Ida Beathe Altin, Dag Kjørsvik, Elin Hansen, Bjørn Henrik The impact of exposure timing on embryo mortality and the partitioning of PAHs when cod eggs are exposed to dispersed and dissolved crude oil |
topic_facet |
Adhesion Pelagic eggs Ecotoxicity Oil droplets Subsurface oil spills Petroleum |
description |
During sub-sea oil spills to the marine environment, oil droplets will rise towards the sea surface at a rate determined by their density and diameter as well as the vertical turbulence in the water. Micro-droplets (< 50 µm) are expected to have prolonged residence times in the water column. If present, pelagic fish eggs may thus be exposed to dispersed oil from subsurface oil spills for days, and the contribution of these micro-droplets to toxicity is not well known. The purpose of this work was to investigate to what extent timing of exposure and the presence of oil micro droplets affects PAH uptake and survival of pelagic Atlantic cod eggs. A single batch of eggs was separated in two groups and exposed to dispersions and corresponding water-soluble fraction at 3–7 days (Early exposure) and 9–13 days (Late exposure) post fertilization. Partitioning of PAHs between crude oil microdroplets, water and eggs was estimated as well as the contribution of oil droplets to PAH body residue and acute and delayed mortality. Timing of oil exposure clearly affects both the mortality rate and the timing of mortality. Even though the body residue of PAHs were lower when embryos were exposed in the later embryonic stage, mortality rate increased relative to the early exposure indicating that critical body residue threshold is stage specific. Although our results suggest that the dissolved fraction is the dominating driver for toxicity in cod embryos exposed to oil dispersions, crude oil micro droplets contribute to increased mortality as well. publishedVersion |
format |
Article in Journal/Newspaper |
author |
Nordtug, Trond Olsen, Anders Johny Wold, Per-Arvid Salaberria, Iurgi Øverjordet, Ida Beathe Altin, Dag Kjørsvik, Elin Hansen, Bjørn Henrik |
author_facet |
Nordtug, Trond Olsen, Anders Johny Wold, Per-Arvid Salaberria, Iurgi Øverjordet, Ida Beathe Altin, Dag Kjørsvik, Elin Hansen, Bjørn Henrik |
author_sort |
Nordtug, Trond |
title |
The impact of exposure timing on embryo mortality and the partitioning of PAHs when cod eggs are exposed to dispersed and dissolved crude oil |
title_short |
The impact of exposure timing on embryo mortality and the partitioning of PAHs when cod eggs are exposed to dispersed and dissolved crude oil |
title_full |
The impact of exposure timing on embryo mortality and the partitioning of PAHs when cod eggs are exposed to dispersed and dissolved crude oil |
title_fullStr |
The impact of exposure timing on embryo mortality and the partitioning of PAHs when cod eggs are exposed to dispersed and dissolved crude oil |
title_full_unstemmed |
The impact of exposure timing on embryo mortality and the partitioning of PAHs when cod eggs are exposed to dispersed and dissolved crude oil |
title_sort |
impact of exposure timing on embryo mortality and the partitioning of pahs when cod eggs are exposed to dispersed and dissolved crude oil |
publisher |
Elsevier |
publishDate |
2022 |
url |
https://hdl.handle.net/11250/3016530 https://doi.org/10.1016/j.ecoenv.2021.113100 |
genre |
atlantic cod |
genre_facet |
atlantic cod |
op_source |
9 229 Ecotoxicology and Environmental Safety 113100 |
op_relation |
Ecotoxicology and Environmental Safety. 2022, 229 . urn:issn:0147-6513 https://hdl.handle.net/11250/3016530 https://doi.org/10.1016/j.ecoenv.2021.113100 cristin:1970316 |
op_rights |
Navngivelse 4.0 Internasjonal http://creativecommons.org/licenses/by/4.0/deed.no © 2021 The Authors. Published by Elsevier Inc. |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1016/j.ecoenv.2021.113100 |
container_title |
Ecotoxicology and Environmental Safety |
container_volume |
229 |
container_start_page |
113100 |
_version_ |
1766358158565965824 |