Please use this identifier to cite or link to this item: http://hdl.handle.net/1893/7457
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dc.contributor.authorCopplestone, Daviden_UK
dc.contributor.authorJackson, Duncanen_UK
dc.contributor.authorHartnoll, Richard Gen_UK
dc.contributor.authorJohnson, Michael Sen_UK
dc.contributor.authorMcDonald, Paulen_UK
dc.contributor.authorWood, Nicken_UK
dc.date.accessioned2012-08-11T23:01:00Z-
dc.date.available2012-08-11T23:01:00Zen_UK
dc.date.issued2004en_UK
dc.identifier.urihttp://hdl.handle.net/1893/7457-
dc.description.abstractDischarges of most radionuclides into the Irish Sea from the BNFL site at Sellafield have decreased over the past 20 years or so. For a few radionuclides, however, discharges have peaked more recently. Notably, operation of the Enhanced Actinide Removal Plant (EARP) since 1994 has led to an increase in discharges of 99Tc, as a result of the treatment of previously stored waste, with consequent increases in 99Tc activity concentrations in a number of marine species, particularly in crustaceans such as lobsters. Previous research has considered the significance of factors such as sex and body weight on radionuclide concentrations. The current project set out to investigate whether seasonal variations in radionuclide concentrations in crabs and lobsters occur, with particular emphasis on the dynamics of 99Tc and 137Cs. Organisms were obtained from a site off the Isle of Man, where radionuclide concentrations were measurable but the site was sufficiently distant from Sellafield that the radionuclides were well mixed in the water column and not likely to be influenced by the pulsed nature of discharges of 99Tc. Crab and lobster samples were collected monthly, between February 2000 and February 2001. Fifteen or 16 individuals (evenly split as male and female) of each species were collected on each occasion. Seawater samples were also collected over the 12-month period. Activity concentrations of 99Tc in the edible meat fraction (both brown and white meat) ranged from 0.23 to 2.46 Bq kg−1 (fresh weight (fw)) in crabs and 124 to 216 Bq kg−1 (fw) in lobsters, with no observed seasonal variations. Activity concentrations of 137Cs in both crab and lobster were lower, ranging from less than 0.16 to 0.85 Bq kg−1 for crab meat (fw) and  less than 0.3 to 3.3 Bq kg−1 for lobster meat (fw). A statistically significant increase in activity concentrations of 137Cs in the meat was observed in the summer months for both crab and lobster. The cause has not been investigated but may be related to the laying down of energy reserves during the active feeding period over the summer. At all times, uptake of 99Tc is higher in the brown meat fraction of both crabs and lobsters, whilst 137Cs is more uniformly distributed. These results are used to discuss the implications for sampling and monitoring programmesen_UK
dc.language.isoenen_UK
dc.publisherElsevieren_UK
dc.relationCopplestone D, Jackson D, Hartnoll RG, Johnson MS, McDonald P & Wood N (2004) Seasonal variations in activity concentrations of Tc-99 and Cs-137 in the edible meat fraction of crabs and lobsters from the central Irish Sea. Journal of Environmental Radioactivity, 73 (1), pp. 29-48. https://doi.org/10.1016/j.jenvrad.2003.06.001en_UK
dc.rightsThe publisher does not allow this work to be made publicly available in this Repository. Please use the Request a Copy feature at the foot of the Repository record to request a copy directly from the author. You can only request a copy if you wish to use this work for your own research or private study.en_UK
dc.rights.urihttp://www.rioxx.net/licenses/under-embargo-all-rights-reserveden_UK
dc.subjectIrish Seaen_UK
dc.subjectcancer pagurusen_UK
dc.subjecthomarus gammarusen_UK
dc.subjecttechnetiumen_UK
dc.subjectuptake and seasonal variationen_UK
dc.titleSeasonal variations in activity concentrations of Tc-99 and Cs-137 in the edible meat fraction of crabs and lobsters from the central Irish Seaen_UK
dc.typeJournal Articleen_UK
dc.rights.embargodate3000-12-01en_UK
dc.rights.embargoreason[copplestone_crabsandlobstersirishsea_2004.pdf] The publisher does not allow this work to be made publicly available in this Repository therefore there is an embargo on the full text of the work.en_UK
dc.identifier.doi10.1016/j.jenvrad.2003.06.001en_UK
dc.citation.jtitleJournal of Environmental Radioactivityen_UK
dc.citation.issn0265-931Xen_UK
dc.citation.volume73en_UK
dc.citation.issue1en_UK
dc.citation.spage29en_UK
dc.citation.epage48en_UK
dc.citation.publicationstatusPublisheden_UK
dc.citation.peerreviewedRefereeden_UK
dc.type.statusVoR - Version of Recorden_UK
dc.author.emaildavid.copplestone@stir.ac.uken_UK
dc.contributor.affiliationBiological and Environmental Sciencesen_UK
dc.contributor.affiliationEnviros Quantiscien_UK
dc.contributor.affiliationUniversity of Liverpoolen_UK
dc.contributor.affiliationUniversity of Liverpoolen_UK
dc.contributor.affiliationWestlakes Scientific Consulting Ltden_UK
dc.contributor.affiliationFood Standards Agencyen_UK
dc.identifier.isiWOS:000220643700003en_UK
dc.identifier.wtid779582en_UK
dc.contributor.orcid0000-0002-1468-9545en_UK
dcterms.dateAccepted2004-12-31en_UK
dc.date.filedepositdate2012-08-10en_UK
rioxxterms.typeJournal Article/Reviewen_UK
rioxxterms.versionVoRen_UK
local.rioxx.authorCopplestone, David|0000-0002-1468-9545en_UK
local.rioxx.authorJackson, Duncan|en_UK
local.rioxx.authorHartnoll, Richard G|en_UK
local.rioxx.authorJohnson, Michael S|en_UK
local.rioxx.authorMcDonald, Paul|en_UK
local.rioxx.authorWood, Nick|en_UK
local.rioxx.projectInternal Project|University of Stirling|https://isni.org/isni/0000000122484331en_UK
local.rioxx.freetoreaddate3000-12-01en_UK
local.rioxx.licencehttp://www.rioxx.net/licenses/under-embargo-all-rights-reserved||en_UK
local.rioxx.filenamecopplestone_crabsandlobstersirishsea_2004.pdfen_UK
local.rioxx.filecount1en_UK
local.rioxx.source0265-931Xen_UK
Appears in Collections:Biological and Environmental Sciences Journal Articles

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