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Article: Risk to breeding success of fish-eating Ardeids due to persistent organic contaminants in Hong Kong: Evidence from organochlorine compounds in eggs

TitleRisk to breeding success of fish-eating Ardeids due to persistent organic contaminants in Hong Kong: Evidence from organochlorine compounds in eggs
Authors
KeywordsBirds
Breeding success
DDE
DDT
Eggs
Probabilistic risk assessment
Issue Date2003
PublisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/watres
Citation
Water Research, 2003, v. 37 n. 2, p. 459-467 How to Cite?
AbstractEggs of two Ardeid species, the Little Egret (Egretta garzetta) and the Black-crowned Night Heron (Nycticorax nycticorax), were collected from two egretries located in the New Territories of Hong Kong with one located near the internationally acclaimed wetland reserve, the Mai Po Marshes, and the other in a remote site (A Chau). The eggs were analysed for organochlorine (OC) compounds including the DDTs, PCBs, hexachlorocyclohexanes (HCHs) and the chlordanes (CHLs). All of the OCs under investigation were detected in the eggs of both species with significantly higher levels in the Little Egret (DDTs, 560-2200; PCBs, 270-1700; CHLs, 81-470ngg-1 wet weight) than the Night Heron (DDTs, 210-1200; PCBs, 85-600; CHLs 59-75ngg-1 wet weight). The DDTs consisted mainly of DDE with levels ranging from 85% to 95% of the total. The HCHs were at about the same levels in both species (8.4-30ngg-1 wet weight). All of the OCs had linear concentration probability distributions on a log-normal basis which were used to evaluate exposure associated with these compounds as part of a probabilistic risk analysis. A linear dose/response relationship for the percentage reduction in the survival of young associated with DDE in eggs was developed. This probabilistic relationship was used to establish the threshold level (1000ngg-1 wet weight) at which there was a significant level of reduction in the survival of young above zero and the variability in DDE concentrations at this effect level. Using a threshold level of 1000ngg-1, the calculated Risk Quotient (RQ) had a 12.4% probability of RQ exceeding unity with the Night Heron, and 40.9% with the Little Egret. These results indicate that the DDTs in eggs would be expected to be associated with adverse effects on the survival of young of both species, particularly the Little Egret. © 2002 Elsevier Science Ltd. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/92795
ISSN
2015 Impact Factor: 5.991
2015 SCImago Journal Rankings: 2.772
ISI Accession Number ID
References

 

DC FieldValueLanguage
dc.contributor.authorConnell, DWen_HK
dc.contributor.authorFung, CNen_HK
dc.contributor.authorMinh, TBen_HK
dc.contributor.authorTanabe, Sen_HK
dc.contributor.authorLam, PKSen_HK
dc.contributor.authorWong, BSFen_HK
dc.contributor.authorLam, MHWen_HK
dc.contributor.authorWong, LCen_HK
dc.contributor.authorWu, RSSen_HK
dc.contributor.authorRichardson, BJen_HK
dc.date.accessioned2010-09-17T10:57:23Z-
dc.date.available2010-09-17T10:57:23Z-
dc.date.issued2003en_HK
dc.identifier.citationWater Research, 2003, v. 37 n. 2, p. 459-467en_HK
dc.identifier.issn0043-1354en_HK
dc.identifier.urihttp://hdl.handle.net/10722/92795-
dc.description.abstractEggs of two Ardeid species, the Little Egret (Egretta garzetta) and the Black-crowned Night Heron (Nycticorax nycticorax), were collected from two egretries located in the New Territories of Hong Kong with one located near the internationally acclaimed wetland reserve, the Mai Po Marshes, and the other in a remote site (A Chau). The eggs were analysed for organochlorine (OC) compounds including the DDTs, PCBs, hexachlorocyclohexanes (HCHs) and the chlordanes (CHLs). All of the OCs under investigation were detected in the eggs of both species with significantly higher levels in the Little Egret (DDTs, 560-2200; PCBs, 270-1700; CHLs, 81-470ngg-1 wet weight) than the Night Heron (DDTs, 210-1200; PCBs, 85-600; CHLs 59-75ngg-1 wet weight). The DDTs consisted mainly of DDE with levels ranging from 85% to 95% of the total. The HCHs were at about the same levels in both species (8.4-30ngg-1 wet weight). All of the OCs had linear concentration probability distributions on a log-normal basis which were used to evaluate exposure associated with these compounds as part of a probabilistic risk analysis. A linear dose/response relationship for the percentage reduction in the survival of young associated with DDE in eggs was developed. This probabilistic relationship was used to establish the threshold level (1000ngg-1 wet weight) at which there was a significant level of reduction in the survival of young above zero and the variability in DDE concentrations at this effect level. Using a threshold level of 1000ngg-1, the calculated Risk Quotient (RQ) had a 12.4% probability of RQ exceeding unity with the Night Heron, and 40.9% with the Little Egret. These results indicate that the DDTs in eggs would be expected to be associated with adverse effects on the survival of young of both species, particularly the Little Egret. © 2002 Elsevier Science Ltd. All rights reserved.en_HK
dc.languageengen_HK
dc.publisherPergamon. The Journal's web site is located at http://www.elsevier.com/locate/watresen_HK
dc.relation.ispartofWater Researchen_HK
dc.subjectBirdsen_HK
dc.subjectBreeding successen_HK
dc.subjectDDEen_HK
dc.subjectDDTen_HK
dc.subjectEggsen_HK
dc.subjectProbabilistic risk assessmenten_HK
dc.titleRisk to breeding success of fish-eating Ardeids due to persistent organic contaminants in Hong Kong: Evidence from organochlorine compounds in eggsen_HK
dc.typeArticleen_HK
dc.identifier.emailWu, RSS: rudolfwu@hku.hken_HK
dc.identifier.authorityWu, RSS=rp01398en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/S0043-1354(02)00294-4en_HK
dc.identifier.pmid12502075-
dc.identifier.scopuseid_2-s2.0-20244389973en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-20244389973&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume37en_HK
dc.identifier.issue2en_HK
dc.identifier.spage459en_HK
dc.identifier.epage467en_HK
dc.identifier.isiWOS:000179563500024-
dc.publisher.placeUnited Kingdomen_HK
dc.identifier.scopusauthoridConnell, DW=7101771209en_HK
dc.identifier.scopusauthoridFung, CN=7102443714en_HK
dc.identifier.scopusauthoridMinh, TB=7004322947en_HK
dc.identifier.scopusauthoridTanabe, S=7401677757en_HK
dc.identifier.scopusauthoridLam, PKS=7202365776en_HK
dc.identifier.scopusauthoridWong, BSF=7402021987en_HK
dc.identifier.scopusauthoridLam, MHW=7202630175en_HK
dc.identifier.scopusauthoridWong, LC=36947356800en_HK
dc.identifier.scopusauthoridWu, RSS=7402945079en_HK
dc.identifier.scopusauthoridRichardson, BJ=7202395817en_HK

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