Utilize este identificador para referenciar este registo: http://hdl.handle.net/10400.5/8270
Título: Efeito da temperatura na bioacumulação e eliminação do metilmercúrio em robalo (Dicentrarchus labrax)
Autor: Custódio, Ana Filipa Silva
Orientador: Marques, António Manuel Barros
Maulvault, Ana Luísa Marques Paixão de Carvalho
Martins, Maria Luísa Louro
Palavras-chave: climate change
temperature
methylmercury
bioaccumulation
sea bass
Data de Defesa: 2014
Editora: ISA/UL
Citação: Custódio, A.F.S. - Efeito da temperatura na bioacumulação e eliminação do metilmercúrio em robalo (Dicentrarchus labrax). Lisboa: ISA, 2014, 87 p.
Resumo: In this study the effects of seawater temperature increase expected in climate change in bioaccumulation of mercury (Hg) were studied in sea bass (Dicentrarchus labrax). The concentration of total mercury (total Hg) and methylmercury (MeHg) were determined in fish samples subjected to 28 days of exposure to a diet contaminated with MeHg, followed by 28 days of elimination (i.e. non contaminated diet). The results revealed that the highest concentrations of Hg were observed in sea bass maintained at higher temperature (22 ºC). Total Hg and MeHg concentrations increased during the exposure phase, starting from 0.10 and 0.08 mg kg-1, respectively, on day 0, and reaching 0.11 and 0.08 mg kg-1 in scenario 1, 1.47 and 1.23 mg kg-1 in scenario 2, and 1.78 and 1.50 mg kg-1 in scenario 3. During the elimination phase the concentrations of Hg remained stable in the three scenarios. In conclusion, this study revealed that sea bass exposed to higher temperatures bioaccumulate more Hg, thus being expected that climate change may exacerbate the risk associated with the consumption of seafood with identical characteristics to those of sea bass
Descrição: Mestrado em Engenharia Alimentar - Instituto Superior de Agronomia
URI: http://hdl.handle.net/10400.5/8270
Aparece nas colecções:BISA - Dissertações de Mestrado / Master Thesis

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