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dc.contributor.authorHansen, Bjørn Henrik
dc.contributor.authorSalaberria, Iurgi
dc.contributor.authorRead, Kari
dc.contributor.authorWold, Per Sverre
dc.contributor.authorHammer, Karen Marie
dc.contributor.authorOlsen, Anders Johny
dc.contributor.authorAltin, Dag
dc.contributor.authorØverjordet, Ida Beathe
dc.contributor.authorNordtug, Trond
dc.contributor.authorBardal, Tora
dc.contributor.authorKjørsvik, Elin
dc.date.accessioned2019-07-08T06:52:07Z
dc.date.available2019-07-08T06:52:07Z
dc.date.created2019-07-03T15:28:19Z
dc.date.issued2019-09
dc.identifier.citationMarine Environmental Research, 2019, 150nb_NO
dc.identifier.issn0141-1136
dc.identifier.urihttp://hdl.handle.net/11250/2603721
dc.description.abstractDuring accidental crude oil spills and permitted discharges of produced water into the marine environment, a large fraction of naturally occurring oil components will be contained in micron-sized oil droplets. Toxicity is assumed to be associated with the dissolved fraction of oil components, however the potential contribution of oil droplets to toxicity is currently not well known. In the present work we wanted to evaluate the contribution of oil droplets to effects on normal development of Atlantic cod (Gadus morhua) through exposing embryos for 96 h to un-filtered (dispersions containing droplets) and filtered (water soluble fractions) dispersions in a flow-through system at dispersion concentrations ranging from 0.14 to 4.34 mg oil/L. After exposure, the embryos were kept in clean seawater until hatch when survival, development and morphology were assessed. The experiment was performed at two different stages of embryonic development to cover two potentially sensitive stages (gastrulation and organogenesis). Exposure of cod embryos to crude oil dispersions caused acute and delayed toxicity, including manifestation of morphological deformations in hatched larvae. Oil droplets appear to contribute to some of the observed effects including mortality, larvae condition (standard length, body surface, and yolk sac size), spinal deformations as well as alterations in craniofacial and jaw development. The timing of exposure may be essential for the development of effects as higher acute mortality was observed when embryos were exposed from the start of gastrulation (Experiment 1) than when exposed during organogenesis (Experiment 2). Even though low mortality was observed when exposed during organogenesis, concentration-dependent mortality was observed during recovery.nb_NO
dc.language.isoengnb_NO
dc.publisherElseviernb_NO
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 Internasjonal*
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/deed.no*
dc.subjectOil dispersionnb_NO
dc.subjectEcotoxicitynb_NO
dc.subjectCartilagenb_NO
dc.subjectFish developmentnb_NO
dc.subjectOil dropletsnb_NO
dc.titleDevelopmental effects in fish embryos exposed to oil dispersions – the impact of crude oil micro-dropletsnb_NO
dc.typeJournal articlenb_NO
dc.typePeer reviewednb_NO
dc.description.versionacceptedVersionnb_NO
dc.source.journalMarine Environmental Researchnb_NO
dc.identifier.doi10.1016/j.marenvres.2019.104753
dc.identifier.cristin1709887
cristin.unitcode7566,6,0,0
cristin.unitnameMiljø og nye ressurser
cristin.ispublishedfalse
cristin.fulltextpostprint
cristin.qualitycode2


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Attribution-NonCommercial-NoDerivatives 4.0 Internasjonal
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