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Article: Ecological risk assessments of endocrine disrupting organotin compounds using marine neogastropods in Hong Kong

TitleEcological risk assessments of endocrine disrupting organotin compounds using marine neogastropods in Hong Kong
Authors
KeywordsAntifoulant
Biomarkers
International Maritime Organization
Rockshell
Issue Date2006
PublisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/chemosphere
Citation
Chemosphere, 2006, v. 65 n. 6, p. 922-938 How to Cite?
AbstractAs active ingredients of anti-fouling paints that are widely used on ship hulls, organotin compounds, in particular tributyltin (TBT), are well-known endocrine disruptors causing sex changes in marine organisms and widespread in coastal waters and sediments worldwide. In this study, a comprehensive ecological risk assessment (ERA) of organotins was conducted in Hong Kong waters through determining the imposex status, sex ratio and tissue burdens of these compounds in the neogastropods, Thais clavigera and Thais luteostoma collected from 29 coastal sites. We also investigated the historical trend of organotin effects on these gastropods, and performed a probabilistic ERA based on tissue burden of TBT in the animals. Our results demonstrated that imposex indices were positively correlated with the body burden of organotins in the gastropods. Across all sites, the sex ratio (female:male) decreased significantly with increasing imposex levels or tissue burden of organotins, implying that such pollutants can result in a male-biased population, potentially leading to local extinction in extreme cases. Based on the ERA, 5.4% of all populations of T. clavigera are at risk due to exposure to TBT; the risks include growth inhibition, impairment of immune functions and reduced fitness. Seriously impacted areas included Aberdeen, Repulse Bay, Butterfly Beach, Mui Wo and Ha Mei Wan. A comparison with historical data revealed that there had been some improvement in the areas with low marine traffic, and distant from the major harbour/port. This could partly be due to the restriction on the use of TBT on small vessels (<25 m in length) since 1992. Nevertheless, the organotin contamination still remains severe in areas with high marine traffic or adjacent to large harbours/ports. In particular, the situation in the northeastern waters of Hong Kong has been getting worst since 1996 that is probably associated with the rapid development of the cargo container port at Yantian in China. © 2006 Elsevier Ltd. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/73420
ISSN
2015 Impact Factor: 3.698
2015 SCImago Journal Rankings: 1.536
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorLeung, KMYen_HK
dc.contributor.authorKwong, RPYen_HK
dc.contributor.authorNg, WCen_HK
dc.contributor.authorHoriguchi, Ten_HK
dc.contributor.authorQiu, JWen_HK
dc.contributor.authorYang, Ren_HK
dc.contributor.authorSong, Men_HK
dc.contributor.authorJiang, Gen_HK
dc.contributor.authorZheng, GJen_HK
dc.contributor.authorLam, PKSen_HK
dc.date.accessioned2010-09-06T06:51:06Z-
dc.date.available2010-09-06T06:51:06Z-
dc.date.issued2006en_HK
dc.identifier.citationChemosphere, 2006, v. 65 n. 6, p. 922-938en_HK
dc.identifier.issn0045-6535en_HK
dc.identifier.urihttp://hdl.handle.net/10722/73420-
dc.description.abstractAs active ingredients of anti-fouling paints that are widely used on ship hulls, organotin compounds, in particular tributyltin (TBT), are well-known endocrine disruptors causing sex changes in marine organisms and widespread in coastal waters and sediments worldwide. In this study, a comprehensive ecological risk assessment (ERA) of organotins was conducted in Hong Kong waters through determining the imposex status, sex ratio and tissue burdens of these compounds in the neogastropods, Thais clavigera and Thais luteostoma collected from 29 coastal sites. We also investigated the historical trend of organotin effects on these gastropods, and performed a probabilistic ERA based on tissue burden of TBT in the animals. Our results demonstrated that imposex indices were positively correlated with the body burden of organotins in the gastropods. Across all sites, the sex ratio (female:male) decreased significantly with increasing imposex levels or tissue burden of organotins, implying that such pollutants can result in a male-biased population, potentially leading to local extinction in extreme cases. Based on the ERA, 5.4% of all populations of T. clavigera are at risk due to exposure to TBT; the risks include growth inhibition, impairment of immune functions and reduced fitness. Seriously impacted areas included Aberdeen, Repulse Bay, Butterfly Beach, Mui Wo and Ha Mei Wan. A comparison with historical data revealed that there had been some improvement in the areas with low marine traffic, and distant from the major harbour/port. This could partly be due to the restriction on the use of TBT on small vessels (<25 m in length) since 1992. Nevertheless, the organotin contamination still remains severe in areas with high marine traffic or adjacent to large harbours/ports. In particular, the situation in the northeastern waters of Hong Kong has been getting worst since 1996 that is probably associated with the rapid development of the cargo container port at Yantian in China. © 2006 Elsevier Ltd. All rights reserved.en_HK
dc.languageengen_HK
dc.publisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/chemosphereen_HK
dc.relation.ispartofChemosphereen_HK
dc.subjectAntifoulanten_HK
dc.subjectBiomarkersen_HK
dc.subjectInternational Maritime Organizationen_HK
dc.subjectRockshellen_HK
dc.titleEcological risk assessments of endocrine disrupting organotin compounds using marine neogastropods in Hong Kongen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0045-6535&volume=65&spage=922&epage=938&date=2006&atitle=Ecological+risk+assessments+of+endocrine+disrupting+organotin+compounds+using+marine+neogastropods+in+Hong+Kongen_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/j.chemosphere.2006.03.048en_HK
dc.identifier.pmid16674992en_HK
dc.identifier.scopuseid_2-s2.0-33748180164en_HK
dc.identifier.hkuros119862en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-33748180164&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume65en_HK
dc.identifier.issue6en_HK
dc.identifier.spage922en_HK
dc.identifier.epage938en_HK
dc.identifier.isiWOS:000242153000003-
dc.publisher.placeUnited Kingdomen_HK
dc.identifier.scopusauthoridLeung, KMY=7401860738en_HK
dc.identifier.scopusauthoridKwong, RPY=40161790900en_HK
dc.identifier.scopusauthoridNg, WC=24723024100en_HK
dc.identifier.scopusauthoridHoriguchi, T=7202377500en_HK
dc.identifier.scopusauthoridQiu, JW=7403309861en_HK
dc.identifier.scopusauthoridYang, R=8898220600en_HK
dc.identifier.scopusauthoridSong, M=8603740300en_HK
dc.identifier.scopusauthoridJiang, G=7401706624en_HK
dc.identifier.scopusauthoridZheng, GJ=7402223259en_HK
dc.identifier.scopusauthoridLam, PKS=7202365776en_HK

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