You are here

The key to sustainable sea lice control is in the genome.

Exposure to crude oil micro-droplets causes reduced food uptake in copepods associated with alteration in their metabolic profiles

Overview
TitleExposure to crude oil micro-droplets causes reduced food uptake in copepods associated with alteration in their metabolic profiles
AuthorsHansen BH, Altin D, Nordtug T, Øverjordet IB, Olsen AJ, Krause D, Størdal I, Størseth TR
TypeJournal Article
Journal NameAquatic toxicology (Amsterdam, Netherlands)
Volume184
IssueN/A
Year2017
Page(s)94-102
CitationHansen BH, Altin D, Nordtug T, Øverjordet IB, Olsen AJ, Krause D, Størdal I, Størseth TR. Exposure to crude oil micro-droplets causes reduced food uptake in copepods associated with alteration in their metabolic profiles. Aquatic toxicology (Amsterdam, Netherlands). 2017 Jan 19; 184:94-102.

Abstract

<p>Acute oil spills and produced water discharges may cause exposure of filter-feeding pelagic organisms to micron-sized dispersed oil droplets. The dissolved oil components are expected to be the main driver for oil dispersion toxicity; however, very few studies have investigated the specific contribution of oil droplets to toxicity. In the present work, the contribution of oil micro-droplet toxicity in dispersions was isolated by comparing exposures to oil dispersions (water soluble fraction with droplets) to concurrent exposure to filtered dispersions (water-soluble fractions without droplets). Physical (coloration) and behavioral (feeding activity) as well as molecular (metabolite profiling) responses to oil exposures in the copepod Calanus finmarchicus were studied. At high dispersion concentrations (4.1-5.6mg oil/L), copepods displayed carapace discoloration and reduced swimming activity. Reduced feeding activity, measured as algae uptake, gut filling and fecal pellet production, was evident also for lower concentrations (0.08mg oil/L). Alterations in metabolic profiles were also observed following exposure to oil dispersions. The pattern of responses were similar between two comparable experiments with different oil types, suggesting responses to be non-oil type specific. Furthermore, oil micro-droplets appear to contribute to some of the observed effects triggering a starvation-type response, manifested as a reduction in metabolite (homarine, acetylcholine, creatine and lactate) concentrations in copepods. Our work clearly displays a relationship between crude oil micro-droplet exposure and reduced uptake of algae in copepods.</p>
Properties
Additional details for this publication include:
Property NameValue
Journal CountryNetherlands
Publication TypeJournal Article
Language Abbreng
LanguageEnglish
CopyrightCopyright © 2017 Elsevier B.V. All rights reserved.
DOI10.1016/j.aquatox.2017.01.007
Elocation10.1016/j.aquatox.2017.01.007
PIIS0166-445X(17)30015-2
Journal AbbreviationAquat. Toxicol.
Publication Date2017 Jan 19
eISSN1879-1514
ISSN1879-1514
Publication ModelPrint-Electronic
Cross References
This publication is also available in the following databases:
DatabaseAccession
PMID: PubMedPMID:28119129