Please use this identifier to cite or link to this item: http://hdl.handle.net/10773/37501
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dc.contributor.authorSeco, Josépt_PT
dc.contributor.authorXavier, José C.pt_PT
dc.contributor.authorCoelho, João P.pt_PT
dc.contributor.authorPereira, Bárbarapt_PT
dc.contributor.authorTarling, Geraintpt_PT
dc.contributor.authorPardal, Miguel A.pt_PT
dc.contributor.authorBustamante, Pacopt_PT
dc.contributor.authorStowasser, Gabrielept_PT
dc.contributor.authorBrierley, Andrew S.pt_PT
dc.contributor.authorPereira, Maria E.pt_PT
dc.date.accessioned2023-05-04T10:48:44Z-
dc.date.available2023-05-04T10:48:44Z-
dc.date.issued2019-04-
dc.identifier.issn0269-7491pt_PT
dc.identifier.urihttp://hdl.handle.net/10773/37501-
dc.description.abstractTotal and organic mercury concentrations were determined for males, females and juveniles of Euphausia superba collected at three discrete locations in the Scotia Sea (South Orkney Islands, South Georgia and Antarctic Polar Front) to assess spatial mercury variability in Antarctic krill. There was clear geographic differentiation in mercury concentrations, with specimens from the South Orkney Islands having total mercury concentrations 5 to 7 times higher than Antarctic krill from South Georgia and the Antarctic Polar Front. Mercury did not appear to accumulate with life-stage since juveniles had higher concentrations of total mercury (0.071 μg g-1 from South Orkney Islands; 0.014 μg g-1 from South Georgia) than adults (0.054 μg g-1 in females and 0.048 μg g-1 in males from South Orkney Islands; 0.006 μg g-1 in females and 0.007 μg g-1 in males from South Georgia). Results suggest that females may use egg laying as a mechanism to excrete mercury, with eggs having higher concentrations than the corresponding somatic tissue. Organic mercury makes up a minor percentage of total mercury (15-37%) with the percentage being greater in adults than in juveniles. When compared to euphausiids from other parts of the world, the concentration of mercury in Antarctic krill is within the same range, or higher, highlighting the global distribution of this contaminant. Given the high potential for biomagnification of mercury through food webs, concentrations in Antarctic krill may have deleterious effects on long-lived Antarctic krill predators.pt_PT
dc.language.isoengpt_PT
dc.publisherElsevierpt_PT
dc.relationJR15004pt_PT
dc.relationJR177pt_PT
dc.relationJR16003pt_PT
dc.relationSRFH/PD/BD/113487pt_PT
dc.relationCentro-01-0145-FEDER-000018pt_PT
dc.relationinfo:eu-repo/grantAgreement/FCT/6817 - DCRRNI ID/UID%2FMAR%2F04292%2F2013/PTpt_PT
dc.rightsopenAccesspt_PT
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/pt_PT
dc.subjectFood-webpt_PT
dc.subjectEgg layingpt_PT
dc.subjectCrustaceanpt_PT
dc.subjectSouthern Oceanpt_PT
dc.subjectContaminantpt_PT
dc.titleSpatial variability in total and organic mercury levels in Antarctic krill Euphausia superba across the Scotia Seapt_PT
dc.typearticlept_PT
dc.description.versionpublishedpt_PT
dc.peerreviewedyespt_PT
degois.publication.firstPage332pt_PT
degois.publication.lastPage339pt_PT
degois.publication.titleEnvironmental pollution (Barking, Essex : 1987)pt_PT
degois.publication.volume247pt_PT
dc.identifier.doi10.1016/j.envpol.2019.01.031pt_PT
dc.identifier.essn1873-6424pt_PT
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DBio - Artigos
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