The accumulation of lead and mercury from seawater and their depuration by eggs of the spotted dogfish Scyliorhinus canicula (Chondrichthys)

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dc.contributor.author Jeffree, Ross en_US
dc.contributor.author Oberhaensli, Francois en_US
dc.contributor.author Teyssie, Jean-Louis en_US
dc.contributor.editor en_US
dc.date.accessioned 2012-02-02T07:45:12Z
dc.date.available 2012-02-02T07:45:12Z
dc.date.issued 2008 en_US
dc.identifier 2010003811 en_US
dc.identifier.citation Jeffree Ross, Oberhaensli Francois, and Teyssie Jean-Louis 2008, 'The accumulation of lead and mercury from seawater and their depuration by eggs of the spotted dogfish Scyliorhinus canicula (Chondrichthys)', Springer, vol. 55, no. 3, pp. 451-461. en_US
dc.identifier.issn 0090-4341 en_US
dc.identifier.other C1UNSUBMIT en_US
dc.identifier.uri http://hdl.handle.net/10453/14916
dc.description.abstract Radiotracer experiments using Pb-210 and Hg-203 demonstrated that eggs of the spotted dogfish Scyliorhinus canicula absorbed lead and inorganic mercury directly from seawater over 21 days of experimental exposure, attaining total egg concentration factors (CFs) relative to water of approximately 400 for Pb and 180 for Hg, predominantly (>= 98%) due to their accumulation by the collagenous egg case. The rates of accumulation of both Pb and Hg by the total egg were significantly (P < 0.0001) reduced by its increasing age since parturition, whereas only the rate of depuration of Pb was reduced (P < 0.0001) with increasing age; these effects indicate a declining chemical reactivity of the egg case that may be due to the continued tanning of the case following parturition. The egg case per se, attained average CFs of about 1,500 and 850 for Pb and Hg, respectively. Both Pb and Hg showed declining concentration gradients from the exterior to the interior membranes of the wall of the egg case; CFs for Pb declined from 3,500 to 2,000 and for Hg from 5,000 to 500. Comparison of concentrations in separate membranes also demonstrated significant (P <= 0.01) depurations of Hg from the external and internal membranes during the loss experiments. en_US
dc.language en_US
dc.publisher Springer en_US
dc.relation.isbasedon http://dx.doi.org/10.1007/s00244-007-9103-4 en_US
dc.title The accumulation of lead and mercury from seawater and their depuration by eggs of the spotted dogfish Scyliorhinus canicula (Chondrichthys) en_US
dc.parent Archives Of Environmental Contamination And Toxicology en_US
dc.journal.volume 55 en_US
dc.journal.number 3 en_US
dc.publocation New York, USA en_US
dc.identifier.startpage 451 en_US
dc.identifier.endpage 461 en_US
dc.cauo.name SCI.Faculty of Science en_US
dc.conference Verified OK en_US
dc.for 060200 en_US
dc.personcode 110409 en_US
dc.personcode 0000069112 en_US
dc.personcode 0000066581 en_US
dc.percentage 100 en_US
dc.classification.name Ecology en_US
dc.classification.type FOR-08 en_US
dc.edition en_US
dc.custom en_US
dc.date.activity en_US
dc.location.activity en_US
dc.description.keywords heavy-metals; transport; bioaccumulation; radionuclides; speciation; waters en_US


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