Fish eyes and brain as primary targets for mercury accumulation: a new insight on environmental risk assessment
Autor(a) principal: | |
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Data de Publicação: | 2014 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | https://hdl.handle.net/1822/33311 |
Resumo: | Fish eyes and brain are highly susceptible to environmental Hg exposure but this issue is still scarcely investigated, mainly regarding methylmercury (MeHg) accumulation. Yet, Hg levels in fish lens have not been previously examined under field conditions. Total Hg (tHg), MeHg and inorganic Hg (iHg) levels were assessed in the brain, eye wall and lens of the golden grey mullet (Liza aurata) from an Hg contaminated area, both in winter and summer, together with water and sediment levels. Sampling was performed at Aveiro lagoon (Portugal) where a confined area (LAR) is severely contaminated by Hg. Fish brain, eye wall and lens accumulated higher levels of tHg, MeHg and iHg at LAR than the reference site, reflecting faithfully environmental spatial differences. The brain and eye wall responded also to the winter-summer changes found in water and sediment, accumulating higher levels of MeHg (and tHg) in winter. Contrarily, lens was unable to reflect seasonal changes, probably due to its composition and structural stability over time. The three neurosensory structures accumulated preferentially MeHg than iHg (MeHg was higher than 77% of tHg). Lens exhibited a higher retention capacity of MeHg (mean around 1 µg g(-1) at LAR), accumulating higher levels than the other two tissues. Interestingly, MeHg and iHg levels were significantly correlated for the brain and eye wall but poorly associated within the two analysed eye components. The high levels of MeHg found in the brain, eye wall and lens could compromise their functions and this needs further research. |
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Fish eyes and brain as primary targets for mercury accumulation: a new insight on environmental risk assessmentMethylmercuryInorganic mercuryBioaccumulationNeurosensory structuresFishEnvironmental contaminant biomonitoringScience & TechnologyFish eyes and brain are highly susceptible to environmental Hg exposure but this issue is still scarcely investigated, mainly regarding methylmercury (MeHg) accumulation. Yet, Hg levels in fish lens have not been previously examined under field conditions. Total Hg (tHg), MeHg and inorganic Hg (iHg) levels were assessed in the brain, eye wall and lens of the golden grey mullet (Liza aurata) from an Hg contaminated area, both in winter and summer, together with water and sediment levels. Sampling was performed at Aveiro lagoon (Portugal) where a confined area (LAR) is severely contaminated by Hg. Fish brain, eye wall and lens accumulated higher levels of tHg, MeHg and iHg at LAR than the reference site, reflecting faithfully environmental spatial differences. The brain and eye wall responded also to the winter-summer changes found in water and sediment, accumulating higher levels of MeHg (and tHg) in winter. Contrarily, lens was unable to reflect seasonal changes, probably due to its composition and structural stability over time. The three neurosensory structures accumulated preferentially MeHg than iHg (MeHg was higher than 77% of tHg). Lens exhibited a higher retention capacity of MeHg (mean around 1 µg g(-1) at LAR), accumulating higher levels than the other two tissues. Interestingly, MeHg and iHg levels were significantly correlated for the brain and eye wall but poorly associated within the two analysed eye components. The high levels of MeHg found in the brain, eye wall and lens could compromise their functions and this needs further research.Patricia Pereira (SFRH/BPD/69563/2010) and Joana Raimundo (SFRH/BPD/91498/2012) benefit from Post-doctoral grants supported by "Fundacao para a Ciencia e a Tecnologia" (FCT). This work as been supported by the Research project financed by FCT PTDC/AAG-REC/2488/2012 (NEUTOXMER - Neurotoxicity of mercury in fish and association with morphofunctional brain alterations and behavior shifts), as well as by the Centre for Environmental and Marine Studies (CESAM). Authors are also grateful to Sofia Guilherme for the support in sampling campaigns.ElsevierUniversidade do MinhoPereira, PatríciaRaimundo,JoanaAraújo, OlindaCanário, JoãoAlmeida, ArmandoPacheco, Mário20142014-01-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttps://hdl.handle.net/1822/33311engPereira, P., Raimundo, J., Araújo, O., Canário, J., Almeida, A., & Pacheco, M. (2014, October). Fish eyes and brain as primary targets for mercury accumulation — A new insight on environmental risk assessment. Science of The Total Environment. Elsevier BV. http://doi.org/10.1016/j.scitotenv.2014.07.0080048-969710.1016/j.scitotenv.2014.07.00825058895https://www.sciencedirect.com/science/article/pii/S0048969714010237info: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:RCAAP2024-05-11T05:11:28Zoai:repositorium.sdum.uminho.pt:1822/33311Portal AgregadorONGhttps://www.rcaap.pt/oai/openairemluisa.alvim@gmail.comopendoar:71602024-05-11T05:11:28Repositório 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 |
Fish eyes and brain as primary targets for mercury accumulation: a new insight on environmental risk assessment |
title |
Fish eyes and brain as primary targets for mercury accumulation: a new insight on environmental risk assessment |
spellingShingle |
Fish eyes and brain as primary targets for mercury accumulation: a new insight on environmental risk assessment Pereira, Patrícia Methylmercury Inorganic mercury Bioaccumulation Neurosensory structures Fish Environmental contaminant biomonitoring Science & Technology |
title_short |
Fish eyes and brain as primary targets for mercury accumulation: a new insight on environmental risk assessment |
title_full |
Fish eyes and brain as primary targets for mercury accumulation: a new insight on environmental risk assessment |
title_fullStr |
Fish eyes and brain as primary targets for mercury accumulation: a new insight on environmental risk assessment |
title_full_unstemmed |
Fish eyes and brain as primary targets for mercury accumulation: a new insight on environmental risk assessment |
title_sort |
Fish eyes and brain as primary targets for mercury accumulation: a new insight on environmental risk assessment |
author |
Pereira, Patrícia |
author_facet |
Pereira, Patrícia Raimundo,Joana Araújo, Olinda Canário, João Almeida, Armando Pacheco, Mário |
author_role |
author |
author2 |
Raimundo,Joana Araújo, Olinda Canário, João Almeida, Armando Pacheco, Mário |
author2_role |
author author author author author |
dc.contributor.none.fl_str_mv |
Universidade do Minho |
dc.contributor.author.fl_str_mv |
Pereira, Patrícia Raimundo,Joana Araújo, Olinda Canário, João Almeida, Armando Pacheco, Mário |
dc.subject.por.fl_str_mv |
Methylmercury Inorganic mercury Bioaccumulation Neurosensory structures Fish Environmental contaminant biomonitoring Science & Technology |
topic |
Methylmercury Inorganic mercury Bioaccumulation Neurosensory structures Fish Environmental contaminant biomonitoring Science & Technology |
description |
Fish eyes and brain are highly susceptible to environmental Hg exposure but this issue is still scarcely investigated, mainly regarding methylmercury (MeHg) accumulation. Yet, Hg levels in fish lens have not been previously examined under field conditions. Total Hg (tHg), MeHg and inorganic Hg (iHg) levels were assessed in the brain, eye wall and lens of the golden grey mullet (Liza aurata) from an Hg contaminated area, both in winter and summer, together with water and sediment levels. Sampling was performed at Aveiro lagoon (Portugal) where a confined area (LAR) is severely contaminated by Hg. Fish brain, eye wall and lens accumulated higher levels of tHg, MeHg and iHg at LAR than the reference site, reflecting faithfully environmental spatial differences. The brain and eye wall responded also to the winter-summer changes found in water and sediment, accumulating higher levels of MeHg (and tHg) in winter. Contrarily, lens was unable to reflect seasonal changes, probably due to its composition and structural stability over time. The three neurosensory structures accumulated preferentially MeHg than iHg (MeHg was higher than 77% of tHg). Lens exhibited a higher retention capacity of MeHg (mean around 1 µg g(-1) at LAR), accumulating higher levels than the other two tissues. Interestingly, MeHg and iHg levels were significantly correlated for the brain and eye wall but poorly associated within the two analysed eye components. The high levels of MeHg found in the brain, eye wall and lens could compromise their functions and this needs further research. |
publishDate |
2014 |
dc.date.none.fl_str_mv |
2014 2014-01-01T00:00:00Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://hdl.handle.net/1822/33311 |
url |
https://hdl.handle.net/1822/33311 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Pereira, P., Raimundo, J., Araújo, O., Canário, J., Almeida, A., & Pacheco, M. (2014, October). Fish eyes and brain as primary targets for mercury accumulation — A new insight on environmental risk assessment. Science of The Total Environment. Elsevier BV. http://doi.org/10.1016/j.scitotenv.2014.07.008 0048-9697 10.1016/j.scitotenv.2014.07.008 25058895 https://www.sciencedirect.com/science/article/pii/S0048969714010237 |
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 |
Elsevier |
publisher.none.fl_str_mv |
Elsevier |
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 |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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RCAAP |
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RCAAP |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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mluisa.alvim@gmail.com |
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1817544544692994048 |