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...
Published in: | Ecotoxicology and Environmental Safety |
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Online Access: | https://doi.org/10.1016/j.ecoenv.2021.113100 https://doaj.org/article/9f540c1eda3d47c1aa3d28ab04d6b5a8 |
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fttriple:oai:gotriple.eu:oai:doaj.org/article:9f540c1eda3d47c1aa3d28ab04d6b5a8 2023-05-15T15:27:44+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 Trond Nordtug Anders J. Olsen Per-Arvid Wold Iurgi Salaberria Ida Beathe Øverjordet Dag Altin Elin Kjørsvik Bjørn Henrik Hansen 2022-01-01 https://doi.org/10.1016/j.ecoenv.2021.113100 https://doaj.org/article/9f540c1eda3d47c1aa3d28ab04d6b5a8 en eng Elsevier 0147-6513 doi:10.1016/j.ecoenv.2021.113100 https://doaj.org/article/9f540c1eda3d47c1aa3d28ab04d6b5a8 undefined Ecotoxicology and Environmental Safety, Vol 229, Iss , Pp 113100- (2022) Petroleum Subsurface oil spills Oil droplets Ecotoxicity Pelagic eggs Adhesion envir geo Journal Article https://vocabularies.coar-repositories.org/resource_types/c_6501/ 2022 fttriple https://doi.org/10.1016/j.ecoenv.2021.113100 2023-01-22T17:50:15Z 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. Article in Journal/Newspaper atlantic cod Unknown Ecotoxicology and Environmental Safety 229 113100 |
institution |
Open Polar |
collection |
Unknown |
op_collection_id |
fttriple |
language |
English |
topic |
Petroleum Subsurface oil spills Oil droplets Ecotoxicity Pelagic eggs Adhesion envir geo |
spellingShingle |
Petroleum Subsurface oil spills Oil droplets Ecotoxicity Pelagic eggs Adhesion envir geo Trond Nordtug Anders J. Olsen Per-Arvid Wold Iurgi Salaberria Ida Beathe Øverjordet Dag Altin Elin Kjørsvik Bjørn Henrik Hansen 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 |
Petroleum Subsurface oil spills Oil droplets Ecotoxicity Pelagic eggs Adhesion envir geo |
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. |
format |
Article in Journal/Newspaper |
author |
Trond Nordtug Anders J. Olsen Per-Arvid Wold Iurgi Salaberria Ida Beathe Øverjordet Dag Altin Elin Kjørsvik Bjørn Henrik Hansen |
author_facet |
Trond Nordtug Anders J. Olsen Per-Arvid Wold Iurgi Salaberria Ida Beathe Øverjordet Dag Altin Elin Kjørsvik Bjørn Henrik Hansen |
author_sort |
Trond Nordtug |
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://doi.org/10.1016/j.ecoenv.2021.113100 https://doaj.org/article/9f540c1eda3d47c1aa3d28ab04d6b5a8 |
genre |
atlantic cod |
genre_facet |
atlantic cod |
op_source |
Ecotoxicology and Environmental Safety, Vol 229, Iss , Pp 113100- (2022) |
op_relation |
0147-6513 doi:10.1016/j.ecoenv.2021.113100 https://doaj.org/article/9f540c1eda3d47c1aa3d28ab04d6b5a8 |
op_rights |
undefined |
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_ |
1766358147203596288 |