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dc.contributor.authorAmachree, Den
dc.contributor.authorMoody, AJen
dc.contributor.authorHandy, RDen
dc.date.accessioned2016-06-22T15:59:54Z
dc.date.available2016-06-22T15:59:54Z
dc.date.issued2014-11en
dc.identifier.urihttp://hdl.handle.net/10026.1/4944
dc.description.abstract

Aquatic organisms are often subject to intermittent exposure to pollutants in real ecosystems. This study aimed to compare mercury accumulation and the physiological responses of mussels, Mytilus edulis during continuous and intermittent exposure to the metal. Mussels were treated in a semi-static, triplicated design to either a control (no added Hg) or 50 µg l(-1) Hg as HgCl2 in continuous (daily) or intermittent (2 day exposure, 2 days in clean seawater alternately) exposure for 14 days. A time-dependent increase in Hg accumulation was observed in the continuous exposure, while the intermittent treatment showed step-wise changes in Hg concentrations with the exposure profile, especially in the gills. At the end of the experiment, tissue Hg concentrations were significantly increased in the continuous compared to the intermittent exposure for digestive gland (4 fold), gonad and remaining soft tissue (>2 fold), but not for the gill and adductor muscle. There was no observed oxidative damage at the end of the experiment as measured by the thiobarbituric acid reactive substances (TBARS) concentrations in tissues from all treatments. However, total glutathione was significantly decreased in the gill and digestive gland of both the continuous and intermittent exposure by the end of the experiment. The neutral red retention ability of the haemocytes was not affected, but total haemocyte counts were significantly decreased (<2 fold) in the intermittent compared to the continuous exposure. Histopathological examinations showed less pathology in the gill, but more inflammation in the digestive gland of mussels for the intermittent compared to the continuous exposure. Overall, the results showed that Hg accumulation from intermittent exposure was less than that of the continuous exposure regime, but the sub-lethal responses are sometimes more severe than expected in the former.

en
dc.format.extent133 - 142en
dc.languageengen
dc.language.isoengen
dc.subjectAccumulationen
dc.subjectBody distributionen
dc.subjectGranulocytomasen
dc.subjectHg uptakeen
dc.subjectPulse exposureen
dc.subjectTotal glutathioneen
dc.subjectAnimalsen
dc.subjectEnvironmental Exposureen
dc.subjectGillsen
dc.subjectGlutathioneen
dc.subjectHemocytesen
dc.subjectMass Spectrometryen
dc.subjectMercuryen
dc.subjectMusclesen
dc.subjectMytilus edulisen
dc.subjectOxidative Stressen
dc.subjectSeawateren
dc.subjectThiobarbituric Acid Reactive Substancesen
dc.subjectTime Factorsen
dc.subjectWater Pollutants, Chemicalen
dc.titleComparison of intermittent and continuous exposures to inorganic mercury in the mussel, Mytilus edulis: accumulation and sub-lethal physiological effects.en
dc.typeJournal Article
plymouth.author-urlhttps://www.ncbi.nlm.nih.gov/pubmed/25178526en
plymouth.volume109en
plymouth.publication-statusPublisheden
plymouth.journalEcotoxicol Environ Safen
dc.identifier.doi10.1016/j.ecoenv.2014.07.025en
plymouth.organisational-group/Plymouth
plymouth.organisational-group/Plymouth/00 Groups by role
plymouth.organisational-group/Plymouth/00 Groups by role/Academics
plymouth.organisational-group/Plymouth/00 Groups by role/Professional Services staff
plymouth.organisational-group/Plymouth/Faculty of Science and Engineering
plymouth.organisational-group/Plymouth/Faculty of Science and Engineering/School of Biological and Marine Sciences
plymouth.organisational-group/Plymouth/REF 2021 Researchers by UoA
plymouth.organisational-group/Plymouth/REF 2021 Researchers by UoA/UoA06 Agriculture, Veterinary and Food Science
plymouth.organisational-group/Plymouth/Research Groups
plymouth.organisational-group/Plymouth/Research Groups/Marine Institute
dc.publisher.placeNetherlandsen
dcterms.dateAccepted2014-07-24en
dc.identifier.eissn1090-2414en
dc.rights.embargoperiodNot knownen
rioxxterms.versionofrecord10.1016/j.ecoenv.2014.07.025en
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserveden
rioxxterms.licenseref.startdate2014-11en
rioxxterms.typeJournal Article/Reviewen


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