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Effects of dietary exposure to herbicide and of the nutritive quality of contaminated food on the reproductive output of Daphnia magna

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dc.contributor.authorSilva, M. Bessa da
dc.contributor.authorAbrantes, N.
dc.contributor.authorRocha-Santos, T.A.P.
dc.contributor.authorDuarte, A.C.
dc.contributor.authorFreitas, A.C.
dc.contributor.authorGomes, Ana M. P.
dc.contributor.authorCarvalho, A.P.
dc.contributor.authorMarques, J.C.
dc.contributor.authorGonçalves, F.
dc.contributor.authorPereira, R.
dc.date.accessioned2017-10-12T16:47:43Z
dc.date.available2017-10-12T16:47:43Z
dc.date.issued2016
dc.description.abstracttRisk assessment of pesticides has been based on direct toxic effects on aquatic organisms. Indirect effectsdata are taken into account but with limitations, as it is frequently difficult to predict their real impactsin the ecosystems. In this context the main aim of this work was to assess how the exposure to theherbicide pendimethalin (Prowl®), under environmentally relevant concentrations, may compromise thenutritional composition of food for a relevant group of primary consumers of freshwater food webs—thedaphnids, thus affecting their reproduction performance and subsequently the long-term sustainabilityof active populations of this grazer. Therefore, Daphnia magna individuals were chronically exposed in aclean medium to a control diet (NCF – i.e., non-contaminated green algae Raphidocelis subcapitata) and to acontaminated diet (CF – i.e., the same monoalgal culture grown in a medium enriched with pendimethalinin a concentration equivalent to the EC20for growth inhibition of algae), during which reproductiveendpoints were assessed. The algae were analysed for protein, carbohydrate and fatty acid content. Thechemical composition of R. subcapitata in the CF revealed a slight decrease on total fatty acid levels, witha particular decrease of essential 9 monounsaturated fatty acids. In contrast, the protein content washigh in the CF. D. magna exposed to CF experienced a 16% reduction in reproduction, measured as thetotal number of offspring produced per female. Additionally, an internal pendimethalin body burden of4.226 g g−1was accumulated by daphnids fed with CF. Hence, although it is difficult to discriminate thecontribution of the pesticide (as a toxic agent transferred through the food web) from that of the food witha poor quality—compromised by the same pesticide, there are no doubts that, under environmentallyrelevant concentrations of pesticides, both pathways may compromise the populations of freshwatergrazers in the long term, with consequences in the control of the primary productivity of these systems.pt_PT
dc.description.versioninfo:eu-repo/semantics/publishedVersionpt_PT
dc.identifier.citationSilva, M. Bessa da; Abrantes, N.; Rocha-Santos, T.A.P.; Duarte, A.C.; Freitas, A.C.; Gomes, Ana M.P.; Carvalho, A.P.; Marques, J.C.; Gonçalves, F.; Pereira, R. - Effects of dietary exposure to herbicide and of the nutritive quality of contaminated food on the reproductive output of Daphnia magna. Aquatic Toxicology. ISSN 0166-445X. Vol. 179 (2016), p. 1–7pt_PT
dc.identifier.doi10.1016/j.aquatox.2016.08.008pt_PT
dc.identifier.eid84982102910
dc.identifier.pmid27541481
dc.identifier.urihttp://hdl.handle.net/10400.14/23056
dc.identifier.wos000385597900001
dc.language.isoengpt_PT
dc.peerreviewedyespt_PT
dc.relationPEst-UID/MAR/04292/2013pt_PT
dc.relationNOVO ÍNDICE DE INTEGRAÇÃO DE RISCO PARA DETERMINAÇÃO HOLÍSTICA DO IMPACTO ECOLÓGICO DE CONTAMINANTES
dc.relationNEWFUNFOODS: NEW FUNCTIONAL FOODS WITH INGREDIENTS FROM MARINE AND MUSHROOMS SOURCES
dc.subjectPendimethalinpt_PT
dc.subjectRaphidocelis subcapitatapt_PT
dc.subjectNutritional qualitypt_PT
dc.subjectFreshwater trophic relationspt_PT
dc.titleEffects of dietary exposure to herbicide and of the nutritive quality of contaminated food on the reproductive output of Daphnia magnapt_PT
dc.typejournal article
dspace.entity.typePublication
oaire.awardTitleNOVO ÍNDICE DE INTEGRAÇÃO DE RISCO PARA DETERMINAÇÃO HOLÍSTICA DO IMPACTO ECOLÓGICO DE CONTAMINANTES
oaire.awardTitleNEWFUNFOODS: NEW FUNCTIONAL FOODS WITH INGREDIENTS FROM MARINE AND MUSHROOMS SOURCES
oaire.awardURIinfo:eu-repo/grantAgreement/FCT//SFRH%2FBD%2F48597%2F2008/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT//SFRH%2FBPD%2F73781%2F2010/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/5876/UID%2FAMB%2F50017%2F2013/PT
oaire.awardURIinfo:eu-repo/grantAgreement/FCT/5876/UID%2FMulti%2F04423%2F2013/PT
oaire.citation.titleAquatic Toxicologypt_PT
oaire.fundingStream5876
oaire.fundingStream5876
person.familyNameAbrantes
person.familyNameRocha-Santos
person.familyNameDuarte
person.familyNameCardoso Freitas Lopes de Freitas
person.familyNameGomes
person.familyNameCarvalho
person.familyNameMARQUES
person.familyNameGonçalves
person.familyNamePereira
person.givenNameNelson
person.givenNameTeresa
person.givenNameArmando
person.givenNameAna Cristina
person.givenNameAna Maria
person.givenNameAna
person.givenNameJOÃO CARLOS
person.givenNameFernando J. M.
person.givenNameRuth
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project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.identifierhttp://doi.org/10.13039/501100001871
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
project.funder.nameFundação para a Ciência e a Tecnologia
rcaap.rightsrestrictedAccesspt_PT
rcaap.typearticlept_PT
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