Toxicity assessment and prediction of a realistic pesticide mixture from a portuguese agricultural area using concentration-response surface statistics

Detalhes bibliográficos
Autor(a) principal: Martins, Cátia Ariana Henriques
Data de Publicação: 2016
Tipo de documento: Dissertação
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10400.5/13382
Resumo: Mestrado em Engenharia do Ambiente - Instituto Superior de Agronomia - UL
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spelling Toxicity assessment and prediction of a realistic pesticide mixture from a portuguese agricultural area using concentration-response surface statisticsmixturechlorpyrifosterbuthylazineDaphia magnaPseudokirchneriella subcapitatatoxicityMestrado em Engenharia do Ambiente - Instituto Superior de Agronomia - ULPrevious work showed the co-occurrence of the organophosphate chlorpyrifos and the striazine herbicide terbuthylazine in surface waters of agricultural areas in “Lezíria do Tejo”, Portugal. In the present study, we examine the effects of these pesticides singly and as a binary mixture on the immobility of Daphnia magna and on the growth rate of the microalgae Pseudokirchneriella subcapitata. Terbuthylazine and chlorpyrifos at single exposure caused a very toxic or toxic response in both organisms. Usually, the toxicity of mixtures is evaluated in relation to the reference models Concentration Addition (CA) and Independent Action (IA). Initially, in this study was used the CA and IA model was to evaluate the joint effects of chlorpyrifos and terbuthylazine. For immobility endpoint, the data fits better to the IA model, due to different mode of action of the pesticides, however a specific pattern was showed; at low dose levels the immobility was lower than modelled (antagonism), whereas at high dose levels the immobility was higher than modelled (synergism). On the other hand, no deviation was observed from independent action in algal tests. This study represents an important step to understand the interactions among pesticides detected previously in field monitoring studies of agricultural areas in “Lezíria do Tejo”, Portugal. Observed mixture toxicity was compared with predictions, calculated from the concentration response functions of chlorpyrifos and terbuthylazine at two realistic concentration ratios by applying the biologically relevant patterns in which deviations occurred. The assumption of these last yielded accurate predictions, although worst for the mixture ratio chlorpyrifos 0.17 and terbuthylazine 85 μg/L under consideration.ISA-ULSilva, Emília Cardoso MouraCerejeira, Maria JoséRepositório da Universidade de LisboaMartins, Cátia Ariana Henriques2017-03-22T11:31:19Z20162016-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisapplication/pdfhttp://hdl.handle.net/10400.5/13382TID:201845768engMartins, C.A,H, - Toxicity assessment and prediction of a realistic pesticide mixture from a portuguese agricultural area using concentration-response surface statistics. Lisboa: ISA, 2016, 44 p.info:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-03-06T14:43:30Zoai:www.repository.utl.pt:10400.5/13382Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T16:59:21.895810Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Toxicity assessment and prediction of a realistic pesticide mixture from a portuguese agricultural area using concentration-response surface statistics
title Toxicity assessment and prediction of a realistic pesticide mixture from a portuguese agricultural area using concentration-response surface statistics
spellingShingle Toxicity assessment and prediction of a realistic pesticide mixture from a portuguese agricultural area using concentration-response surface statistics
Martins, Cátia Ariana Henriques
mixture
chlorpyrifos
terbuthylazine
Daphia magna
Pseudokirchneriella subcapitata
toxicity
title_short Toxicity assessment and prediction of a realistic pesticide mixture from a portuguese agricultural area using concentration-response surface statistics
title_full Toxicity assessment and prediction of a realistic pesticide mixture from a portuguese agricultural area using concentration-response surface statistics
title_fullStr Toxicity assessment and prediction of a realistic pesticide mixture from a portuguese agricultural area using concentration-response surface statistics
title_full_unstemmed Toxicity assessment and prediction of a realistic pesticide mixture from a portuguese agricultural area using concentration-response surface statistics
title_sort Toxicity assessment and prediction of a realistic pesticide mixture from a portuguese agricultural area using concentration-response surface statistics
author Martins, Cátia Ariana Henriques
author_facet Martins, Cátia Ariana Henriques
author_role author
dc.contributor.none.fl_str_mv Silva, Emília Cardoso Moura
Cerejeira, Maria José
Repositório da Universidade de Lisboa
dc.contributor.author.fl_str_mv Martins, Cátia Ariana Henriques
dc.subject.por.fl_str_mv mixture
chlorpyrifos
terbuthylazine
Daphia magna
Pseudokirchneriella subcapitata
toxicity
topic mixture
chlorpyrifos
terbuthylazine
Daphia magna
Pseudokirchneriella subcapitata
toxicity
description Mestrado em Engenharia do Ambiente - Instituto Superior de Agronomia - UL
publishDate 2016
dc.date.none.fl_str_mv 2016
2016-01-01T00:00:00Z
2017-03-22T11:31:19Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/masterThesis
format masterThesis
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/10400.5/13382
TID:201845768
url http://hdl.handle.net/10400.5/13382
identifier_str_mv TID:201845768
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Martins, C.A,H, - Toxicity assessment and prediction of a realistic pesticide mixture from a portuguese agricultural area using concentration-response surface statistics. Lisboa: ISA, 2016, 44 p.
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv ISA-UL
publisher.none.fl_str_mv ISA-UL
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron:RCAAP
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron_str RCAAP
institution RCAAP
reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository.name.fl_str_mv Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
repository.mail.fl_str_mv
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