Transfer and accumulation of paralytic and amnesic shellfish toxins in secondary consumers of the marine trophic chain

Detalhes bibliográficos
Autor(a) principal: Lage, Sandra, 1987-
Data de Publicação: 2010
Tipo de documento: Dissertação
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10451/2057
Resumo: Tese de mestrado, Ecologia Marinha, 2010, Universidade de Lisboa, Faculdade de Ciências
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spelling Transfer and accumulation of paralytic and amnesic shellfish toxins in secondary consumers of the marine trophic chainFitoplânctonMicroalgasToxinas paralisantes (PSP)Teses de mestradoTese de mestrado, Ecologia Marinha, 2010, Universidade de Lisboa, Faculdade de CiênciasResumo alargado em português disponível no documentoParalytic and amnesic shellfish toxins can enter in the marine trophic chain by filterfeeding and benthic organisms. Then due to trophic interrelationships the toxins are transferred to theirs predators. In the last instance, top predators (marine mammals and sea birds) can be intoxicated after fed on primary and secondary consumers. The wild horse mackerel (Trachurus trachurus) was collected in NW and S Portuguese coast between September of 2009 and March of 2010. The results show for the first time that horse mackerel can accumulate high concentrations of PSTs in theirs gastrointestinal tract. Which increased the requirement of evaluated the dynamics of accumulation and elimination of PSTs in secondary consumer fish. Thus aquaculture fishes, white sea breams, were fed with toxin-contaminated cockles. After 5 days of toxin exposure, the fishes were fed with non toxic cockles during 10 days. In this feeding experiment, an increasing of toxin concentration over the exposure period was noticed in the fish gastrointestinal tract. B1 and dcSTX were the only toxins continuously detected during the exposure/elimination period, which reveal a slower elimination than the others PSTs. These two PSTs were also the main toxins in the mackerel toxin profile, which may suggest a specific PSTs elimination by fish species. Although AST were not detected in any mackerel specimen, in octopus (Octopus vulgaris) specimens captured in the same fishing area, domoic acid (DA) was detected in the digestive glands. This accumulation of DA in the octopus was previously identified. However this is the first time that DA was detected during periods of absence of ASP events. Plus DA was predominantly found in the cytosol which increased the evidence of a retention mechanism. Since DA as a hydrophilic compound should be easily release. This thesis supplies relevant data to the growing knowledge on the dynamics of accumulation and elimination of PSTs and AST in secondary consumers and on the toxin transfer in the marine food web.Costa, PedroBrotas, Vanda, 1958-Repositório da Universidade de LisboaLage, Sandra, 1987-2010-12-09T13:12:54Z20102010-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesisapplication/pdfapplication/pdftext/xmlhttp://hdl.handle.net/10451/2057enghttp://catalogo.ul.pt/F/?func=item-global&doc_library=ULB01&type=03&doc_number=000590414info: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:RCAAP2023-11-08T15:42:14Zoai:repositorio.ul.pt:10451/2057Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T21:28:32.214108Repositório 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 Transfer and accumulation of paralytic and amnesic shellfish toxins in secondary consumers of the marine trophic chain
title Transfer and accumulation of paralytic and amnesic shellfish toxins in secondary consumers of the marine trophic chain
spellingShingle Transfer and accumulation of paralytic and amnesic shellfish toxins in secondary consumers of the marine trophic chain
Lage, Sandra, 1987-
Fitoplâncton
Microalgas
Toxinas paralisantes (PSP)
Teses de mestrado
title_short Transfer and accumulation of paralytic and amnesic shellfish toxins in secondary consumers of the marine trophic chain
title_full Transfer and accumulation of paralytic and amnesic shellfish toxins in secondary consumers of the marine trophic chain
title_fullStr Transfer and accumulation of paralytic and amnesic shellfish toxins in secondary consumers of the marine trophic chain
title_full_unstemmed Transfer and accumulation of paralytic and amnesic shellfish toxins in secondary consumers of the marine trophic chain
title_sort Transfer and accumulation of paralytic and amnesic shellfish toxins in secondary consumers of the marine trophic chain
author Lage, Sandra, 1987-
author_facet Lage, Sandra, 1987-
author_role author
dc.contributor.none.fl_str_mv Costa, Pedro
Brotas, Vanda, 1958-
Repositório da Universidade de Lisboa
dc.contributor.author.fl_str_mv Lage, Sandra, 1987-
dc.subject.por.fl_str_mv Fitoplâncton
Microalgas
Toxinas paralisantes (PSP)
Teses de mestrado
topic Fitoplâncton
Microalgas
Toxinas paralisantes (PSP)
Teses de mestrado
description Tese de mestrado, Ecologia Marinha, 2010, Universidade de Lisboa, Faculdade de Ciências
publishDate 2010
dc.date.none.fl_str_mv 2010-12-09T13:12:54Z
2010
2010-01-01T00:00:00Z
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/10451/2057
url http://hdl.handle.net/10451/2057
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv http://catalogo.ul.pt/F/?func=item-global&doc_library=ULB01&type=03&doc_number=000590414
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
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instacron:RCAAP
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
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