Please use this identifier to cite or link to this item:
Full metadata record
DC FieldValueLanguage
dc.contributor.authorCopplestone, David-
dc.contributor.authorJackson, Duncan-
dc.contributor.authorHartnoll, Richard G-
dc.contributor.authorJohnson, Michael S-
dc.contributor.authorMcDonald, Paul-
dc.contributor.authorWood, Nick-
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 pren_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.-
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.-
dc.subjectIrish Seaen_UK
dc.subjectcancer pagurusen_UK
dc.subjecthomarus gammarusen_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.embargoreasonThe 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.-
dc.citation.jtitleJournal of Environmental Radioactivity-
dc.type.statusPublisher version (final published refereed version)-
dc.contributor.affiliationBiological and Environmental Sciences-
dc.contributor.affiliationEnviros Quantisci-
dc.contributor.affiliationUniversity of Liverpool-
dc.contributor.affiliationUniversity of Liverpool-
dc.contributor.affiliationWestlakes Scientific Consulting Ltd-
dc.contributor.affiliationFood Standards Agency-
Appears in Collections:Biological and Environmental Sciences Journal Articles

Files in This Item:
File Description SizeFormat 
copplestone_crabsandlobstersirishsea_2004.pdf281.23 kBAdobe PDFUnder Permanent Embargo    Request a copy

This item is protected by original copyright

Items in the Repository are protected by copyright, with all rights reserved, unless otherwise indicated.

If you believe that any material held in STORRE infringes copyright, please contact providing details and we will remove the Work from public display in STORRE and investigate your claim.