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Article: Fluctuating asymmetry of Amphibalanus (Balanus) amphitrite (Cirripedia: Thoracica) in association with shore height and metal pollution

TitleFluctuating asymmetry of Amphibalanus (Balanus) amphitrite (Cirripedia: Thoracica) in association with shore height and metal pollution
Authors
KeywordsBarnacles
Developmental instability
Environmental stress
Fluctuating asymmetry
Heavy metals
Hong Kong
Issue Date2009
PublisherSpringer Verlag Dordrecht. The Journal's web site is located at http://springerlink.metapress.com/openurl.asp?genre=journal&issn=0018-8158
Citation
Hydrobiologia, 2009, v. 621 n. 1, p. 21-32 How to Cite?
AbstractThe level of fluctuating asymmetry (FA), which is defined as random deviations from perfect bilateral symmetry in the morphological traits of an organism, increases with increasing developmental instability, and it may be used as an indicator of environmental and/or genetic stresses. This study attempted to relate FA levels in the opercular plates of the barnacle Amphibalanus (Balanus) amphitrite with shore height and body trace metal concentrations. Barnacles were collected from both low and mid shores at six coastal locations with various degrees of marine pollution in Hong Kong. Four opercular traits, namely scutum length, tergum length, scutum width, tergum width were measured in the specimen while concentrations of five common trace metals (Cd, Cu, Cr, Mn and Zn) were determined in their body tissues using inductively coupled plasma-atomic emission spectrophotometry. Among the four traits, only tergum length and scutum width fulfilled the assumption of FA while their measurement errors were low. Across all sites, mid-shore A. amphitrite consistently exhibited a significantly higher FA level in scutum width than that in low-shore barnacles, but FA levels in tergum length were similar between the two shore heights. These results suggested that FA was trait-dependent, and mid-shore barnacles were possibly under high physical stress, such as desiccation and high temperature, leading to high developmental instability. Although no positive association was observed between FA and metal contamination in low-shore A. amphitrite, FA level in tergum length significantly increased with decreasing body concentration of manganese (Mn) in these barnacles. Such a negative relationship may be explained by the mechanism of bioaccumulation and physiological role of Mn in A. amphitrite with respect to the formation of barnacle shell plates. © 2008 Springer Science+Business Media B.V.
Persistent Identifierhttp://hdl.handle.net/10722/60694
ISSN
2015 Impact Factor: 2.051
2015 SCImago Journal Rankings: 1.043
ISI Accession Number ID
Funding AgencyGrant Number
Hong Kong Special Administrative Region, ChinaAoE/ P- 04/ 2004)
Funding Information:

The authors would like to thank Jessie Lai and Melody Cheng for their assistance in metal analysis, Cecily Law for her technical support, and Nelson Lam, Hiu Yan Li and Allen To for their help in sample collection. This work is partially supported by the Area of Excellence Scheme under the University Grants Committee of the Hong Kong Special Administrative Region, China ( Project No. AoE/ P- 04/ 2004). DLL thanks the Swire Institute of Marine Science of The University of Hong Kong for supporting his visit in Hong Kong for participation in this research project.

References

 

DC FieldValueLanguage
dc.contributor.authorHo, GWCen_HK
dc.contributor.authorLeung, KMYen_HK
dc.contributor.authorLajus, DLen_HK
dc.contributor.authorNg, JSSen_HK
dc.contributor.authorChan, BKKen_HK
dc.date.accessioned2010-05-31T04:16:39Z-
dc.date.available2010-05-31T04:16:39Z-
dc.date.issued2009en_HK
dc.identifier.citationHydrobiologia, 2009, v. 621 n. 1, p. 21-32en_HK
dc.identifier.issn0018-8158en_HK
dc.identifier.urihttp://hdl.handle.net/10722/60694-
dc.description.abstractThe level of fluctuating asymmetry (FA), which is defined as random deviations from perfect bilateral symmetry in the morphological traits of an organism, increases with increasing developmental instability, and it may be used as an indicator of environmental and/or genetic stresses. This study attempted to relate FA levels in the opercular plates of the barnacle Amphibalanus (Balanus) amphitrite with shore height and body trace metal concentrations. Barnacles were collected from both low and mid shores at six coastal locations with various degrees of marine pollution in Hong Kong. Four opercular traits, namely scutum length, tergum length, scutum width, tergum width were measured in the specimen while concentrations of five common trace metals (Cd, Cu, Cr, Mn and Zn) were determined in their body tissues using inductively coupled plasma-atomic emission spectrophotometry. Among the four traits, only tergum length and scutum width fulfilled the assumption of FA while their measurement errors were low. Across all sites, mid-shore A. amphitrite consistently exhibited a significantly higher FA level in scutum width than that in low-shore barnacles, but FA levels in tergum length were similar between the two shore heights. These results suggested that FA was trait-dependent, and mid-shore barnacles were possibly under high physical stress, such as desiccation and high temperature, leading to high developmental instability. Although no positive association was observed between FA and metal contamination in low-shore A. amphitrite, FA level in tergum length significantly increased with decreasing body concentration of manganese (Mn) in these barnacles. Such a negative relationship may be explained by the mechanism of bioaccumulation and physiological role of Mn in A. amphitrite with respect to the formation of barnacle shell plates. © 2008 Springer Science+Business Media B.V.en_HK
dc.languageengen_HK
dc.publisherSpringer Verlag Dordrecht. The Journal's web site is located at http://springerlink.metapress.com/openurl.asp?genre=journal&issn=0018-8158en_HK
dc.relation.ispartofHydrobiologiaen_HK
dc.subjectBarnaclesen_HK
dc.subjectDevelopmental instabilityen_HK
dc.subjectEnvironmental stressen_HK
dc.subjectFluctuating asymmetryen_HK
dc.subjectHeavy metalsen_HK
dc.subjectHong Kongen_HK
dc.titleFluctuating asymmetry of Amphibalanus (Balanus) amphitrite (Cirripedia: Thoracica) in association with shore height and metal pollutionen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0018-8158&volume=621&spage=21&epage=32&date=2009&atitle=Fluctuating+asymmetry+of+Amphibalanus+(Balanus)+amphitrite+(Cirripedia:+Thoracica)+in+association+with+shore+height+and+metal+pollutionen_HK
dc.identifier.emailLeung, KMY: kmyleung@hku.hken_HK
dc.identifier.authorityLeung, KMY=rp00733en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1007/s10750-008-9629-0en_HK
dc.identifier.scopuseid_2-s2.0-58149269336en_HK
dc.identifier.hkuros154261en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-58149269336&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume621en_HK
dc.identifier.issue1en_HK
dc.identifier.spage21en_HK
dc.identifier.epage32en_HK
dc.identifier.isiWOS:000262172000002-
dc.publisher.placeNetherlandsen_HK
dc.identifier.scopusauthoridHo, GWC=17137084700en_HK
dc.identifier.scopusauthoridLeung, KMY=7401860738en_HK
dc.identifier.scopusauthoridLajus, DL=6602612811en_HK
dc.identifier.scopusauthoridNg, JSS=14833146600en_HK
dc.identifier.scopusauthoridChan, BKK=7201530640en_HK
dc.identifier.citeulike3611210-

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