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Article: Growth rate as a factor confounding the use of the dogwhelk Nucella lapillus as biomonitor of heavy metal contamination

TitleGrowth rate as a factor confounding the use of the dogwhelk Nucella lapillus as biomonitor of heavy metal contamination
Authors
KeywordsDogwhelk
Growth
Metallothionein
Metals
Pollution
RNA
Issue Date2001
PublisherInter-Research. The Journal's web site is located at http://www.int-res.com/journals/meps/index.html
Citation
Marine Ecology Progress Series, 2001, v. 221, p. 145-159 How to Cite?
AbstractGrowth rate of individually tagged dogwhelks Nucella lapillus (L.) was measured in free-living individuals at 3 sites of differing heavy metal contamination in the Firth of Clyde, west Scotland. Condition index (CI), concentrations of metals (Cd, Cu, Pb and Zn), metallothionein (MT), RNA (the RNA/protein ratio) and glycogen were also measured. In general, the marine environments of Gourock and Largs were contaminated with significantly higher tributyltin, Pb and Zn than Loch Fyne, as indicated by the results of imposex indices, and metal concentrations in transplanted polymer-ligands (Chelex® 100) and Mytilus edulis. Further, metal concentrations of native M. edulis (Pb and Zn) and Semibalanus balanoides (Cu) from Gourock were significantly higher than those from Loch Fyne. However, metal accumulation in the dogwhelks displayed a very different pattern. At a standard size (0.5 g wet soft-body weight), N. lapillus from Largs showed higher Cd, Cu and MT in their tissues than individuals from the other 2 populations. Levels of Pb and Zn were similar among the populations despite different concentrations in Chelex and mussels. Gourock dogwhelks showed similar levels of Cu and MT but lower Cd compared to those of Loch Fyne. These differences can be attributed primarily to differences in dogwhelk growth rate between sites. Gourock individuals had a higher CI and RNA/protein ratio in the foot muscle and grew faster (especially at small sizes), resulting in a tissue-dilution effect on metal and MT concentrations. In contrast, higher levels of Cd, Cu and MT in dogwhelks from Largs can be attributed to their growth rate being relatively slow compared to the rate of metal accumulation. Slow-growing individuals in Loch Fyne had relatively high Cd, Pb Zn and MT, although Loch Fyne has been regarded as a clean reference site. Among populations, differences in growth rate may be due to differences in prey availability, predation pressure, and/or genotype. The present results demonstrate that inter-site differences in growth rate can confound the use of the dogwhelks as a biomonitor of metals.
Persistent Identifierhttp://hdl.handle.net/10722/92692
ISSN
2015 Impact Factor: 2.361
2015 SCImago Journal Rankings: 1.554
References

 

DC FieldValueLanguage
dc.contributor.authorLeung, KMYen_HK
dc.contributor.authorMorgan, IJen_HK
dc.contributor.authorWu, RSSen_HK
dc.contributor.authorLau, TCen_HK
dc.contributor.authorSvavarsson, Jen_HK
dc.contributor.authorFurness, RWen_HK
dc.date.accessioned2010-09-17T10:54:21Z-
dc.date.available2010-09-17T10:54:21Z-
dc.date.issued2001en_HK
dc.identifier.citationMarine Ecology Progress Series, 2001, v. 221, p. 145-159en_HK
dc.identifier.issn0171-8630en_HK
dc.identifier.urihttp://hdl.handle.net/10722/92692-
dc.description.abstractGrowth rate of individually tagged dogwhelks Nucella lapillus (L.) was measured in free-living individuals at 3 sites of differing heavy metal contamination in the Firth of Clyde, west Scotland. Condition index (CI), concentrations of metals (Cd, Cu, Pb and Zn), metallothionein (MT), RNA (the RNA/protein ratio) and glycogen were also measured. In general, the marine environments of Gourock and Largs were contaminated with significantly higher tributyltin, Pb and Zn than Loch Fyne, as indicated by the results of imposex indices, and metal concentrations in transplanted polymer-ligands (Chelex® 100) and Mytilus edulis. Further, metal concentrations of native M. edulis (Pb and Zn) and Semibalanus balanoides (Cu) from Gourock were significantly higher than those from Loch Fyne. However, metal accumulation in the dogwhelks displayed a very different pattern. At a standard size (0.5 g wet soft-body weight), N. lapillus from Largs showed higher Cd, Cu and MT in their tissues than individuals from the other 2 populations. Levels of Pb and Zn were similar among the populations despite different concentrations in Chelex and mussels. Gourock dogwhelks showed similar levels of Cu and MT but lower Cd compared to those of Loch Fyne. These differences can be attributed primarily to differences in dogwhelk growth rate between sites. Gourock individuals had a higher CI and RNA/protein ratio in the foot muscle and grew faster (especially at small sizes), resulting in a tissue-dilution effect on metal and MT concentrations. In contrast, higher levels of Cd, Cu and MT in dogwhelks from Largs can be attributed to their growth rate being relatively slow compared to the rate of metal accumulation. Slow-growing individuals in Loch Fyne had relatively high Cd, Pb Zn and MT, although Loch Fyne has been regarded as a clean reference site. Among populations, differences in growth rate may be due to differences in prey availability, predation pressure, and/or genotype. The present results demonstrate that inter-site differences in growth rate can confound the use of the dogwhelks as a biomonitor of metals.en_HK
dc.languageengen_HK
dc.publisherInter-Research. The Journal's web site is located at http://www.int-res.com/journals/meps/index.htmlen_HK
dc.relation.ispartofMarine Ecology Progress Seriesen_HK
dc.rightsMarine Ecology - Progress Series. Copyright © Inter-Research.-
dc.subjectDogwhelken_HK
dc.subjectGrowthen_HK
dc.subjectMetallothioneinen_HK
dc.subjectMetalsen_HK
dc.subjectPollutionen_HK
dc.subjectRNAen_HK
dc.titleGrowth rate as a factor confounding the use of the dogwhelk Nucella lapillus as biomonitor of heavy metal contaminationen_HK
dc.typeArticleen_HK
dc.identifier.emailLeung, KMY: kmyleung@hku.hken_HK
dc.identifier.emailWu, RSS: rudolfwu@hku.hken_HK
dc.identifier.authorityLeung, KMY=rp00733en_HK
dc.identifier.authorityWu, RSS=rp01398en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.scopuseid_2-s2.0-0035909560en_HK
dc.identifier.hkuros65776-
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-0035909560&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume221en_HK
dc.identifier.spage145en_HK
dc.identifier.epage159en_HK
dc.publisher.placeGermanyen_HK
dc.identifier.scopusauthoridLeung, KMY=7401860738en_HK
dc.identifier.scopusauthoridMorgan, IJ=7102095504en_HK
dc.identifier.scopusauthoridWu, RSS=7402945079en_HK
dc.identifier.scopusauthoridLau, TC=7102222310en_HK
dc.identifier.scopusauthoridSvavarsson, J=7004101219en_HK
dc.identifier.scopusauthoridFurness, RW=7103164978en_HK

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