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Article: Influence of static and fluctuating salinity on cadmium uptake and metallothionein expression by the dogwhelk Nucella lapillus (L.)

TitleInfluence of static and fluctuating salinity on cadmium uptake and metallothionein expression by the dogwhelk Nucella lapillus (L.)
Authors
KeywordsBiomonitor
Biomonitoring
Cadmium
Metallothioneins
Nucella lapillus
Salinity
Issue Date2002
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/jembe
Citation
Journal Of Experimental Marine Biology And Ecology, 2002, v. 274 n. 2, p. 175-189 How to Cite?
AbstractThe aim of this study was to investigate the effect of salinity on cadmium (Cd) accumulation and metallothionein (MT) expression in the dogwhelk Nucella lapillus (L.). Adult dogwhelks (shell length: 23.4 ± 1.3 mm) were acclimated to salinity of 33 psu (control), 22 or 11 psu under controlled laboratory conditions (9.5 °C; pH 7.9) for 10 days in a stepwise manner by reducing the salinity by 5.5 psu day-1. Ten treatment groups were used and comprised five salinity regimes (three fixed salinity [33, 22 or 11 psu] and two fluctuating salinity [varied daily between 33 and 22 psu or 33 and 11 psu in a cyclic manner]) at each of two Cd concentrations (control: <0.001 μg Cd 1-1 or treatment: 500 μg Cd 1-1). After acclimation, groups of 20 dogwhelks were exposed to each of the 10 Cd/salinity combinations. All the control and Cd-exposed dogwhelks exposed to 11 psu were dead within 5 days of exposure due to hypo-osmotic stress. Twenty days after exposure to all other treatments, concentrations of Cd and MTs in the tissues of surviving dogwhelks were quantified using atomic absorption spectrophotometry and the silver saturation method, respectively. Both Cd accumulation and MT induction in control or Cd-exposed N. lapillus were significantly influenced by changes in salinity, especially at a prolonged and fixed low salinity (22 psu), although such influences of salinity on the concentration of MTs were dependent on the tissue type. The study highlights that salinity should be considered when monitoring trace metals and/or MTs in intertidal molluscs, particularly in estuarine or transplanted biomonitors. © 2002 Elsevier Science B.V. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/73138
ISSN
2015 Impact Factor: 1.796
2015 SCImago Journal Rankings: 1.029
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorLeung, KMYen_HK
dc.contributor.authorSvavarsson, Jen_HK
dc.contributor.authorCrane, Men_HK
dc.contributor.authorMorritt, Den_HK
dc.date.accessioned2010-09-06T06:48:31Z-
dc.date.available2010-09-06T06:48:31Z-
dc.date.issued2002en_HK
dc.identifier.citationJournal Of Experimental Marine Biology And Ecology, 2002, v. 274 n. 2, p. 175-189en_HK
dc.identifier.issn0022-0981en_HK
dc.identifier.urihttp://hdl.handle.net/10722/73138-
dc.description.abstractThe aim of this study was to investigate the effect of salinity on cadmium (Cd) accumulation and metallothionein (MT) expression in the dogwhelk Nucella lapillus (L.). Adult dogwhelks (shell length: 23.4 ± 1.3 mm) were acclimated to salinity of 33 psu (control), 22 or 11 psu under controlled laboratory conditions (9.5 °C; pH 7.9) for 10 days in a stepwise manner by reducing the salinity by 5.5 psu day-1. Ten treatment groups were used and comprised five salinity regimes (three fixed salinity [33, 22 or 11 psu] and two fluctuating salinity [varied daily between 33 and 22 psu or 33 and 11 psu in a cyclic manner]) at each of two Cd concentrations (control: <0.001 μg Cd 1-1 or treatment: 500 μg Cd 1-1). After acclimation, groups of 20 dogwhelks were exposed to each of the 10 Cd/salinity combinations. All the control and Cd-exposed dogwhelks exposed to 11 psu were dead within 5 days of exposure due to hypo-osmotic stress. Twenty days after exposure to all other treatments, concentrations of Cd and MTs in the tissues of surviving dogwhelks were quantified using atomic absorption spectrophotometry and the silver saturation method, respectively. Both Cd accumulation and MT induction in control or Cd-exposed N. lapillus were significantly influenced by changes in salinity, especially at a prolonged and fixed low salinity (22 psu), although such influences of salinity on the concentration of MTs were dependent on the tissue type. The study highlights that salinity should be considered when monitoring trace metals and/or MTs in intertidal molluscs, particularly in estuarine or transplanted biomonitors. © 2002 Elsevier Science B.V. All rights reserved.en_HK
dc.languageengen_HK
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/jembeen_HK
dc.relation.ispartofJournal of Experimental Marine Biology and Ecologyen_HK
dc.rightsJournal of Experimental Marine Biology and Ecology. Copyright © Elsevier BV.en_HK
dc.subjectBiomonitoren_HK
dc.subjectBiomonitoringen_HK
dc.subjectCadmiumen_HK
dc.subjectMetallothioneinsen_HK
dc.subjectNucella lapillusen_HK
dc.subjectSalinityen_HK
dc.titleInfluence of static and fluctuating salinity on cadmium uptake and metallothionein expression by the dogwhelk Nucella lapillus (L.)en_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0022-0981&volume=274&spage=173&epage=187&date=2002&atitle=Influence+of+static+and+fluctuating+salinity+on+cadmium+uptake+and+metallothionein+expression+by+the+dogwhelk+Nucella+lapillus+(L.)en_HK
dc.identifier.emailLeung, KMY: kmyleung@hku.hken_HK
dc.identifier.authorityLeung, KMY=rp00733en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/S0022-0981(02)00209-5en_HK
dc.identifier.scopuseid_2-s2.0-0037025866en_HK
dc.identifier.hkuros67630en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0037025866&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume274en_HK
dc.identifier.issue2en_HK
dc.identifier.spage175en_HK
dc.identifier.epage189en_HK
dc.identifier.isiWOS:000177139600005-
dc.publisher.placeNetherlandsen_HK
dc.identifier.scopusauthoridLeung, KMY=7401860738en_HK
dc.identifier.scopusauthoridSvavarsson, J=7004101219en_HK
dc.identifier.scopusauthoridCrane, M=7202466944en_HK
dc.identifier.scopusauthoridMorritt, D=7003560499en_HK

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