Título: | TOTAL SELENIUM IN TISSUES OF FOUR DIFFERENTS MARINE ORGANISMS FROM GUANABARA BAY, RJ, BRAZIL | |||||||
Autor: |
TERCIA GUEDES SEIXAS |
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Colaborador(es): |
ISABEL MARIA NETO DA SILVA MOREIRA - Orientador HELENA DO AMARAL KEHRIG - Coorientador |
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Catalogação: | 03/JAN/2005 | Língua(s): | PORTUGUESE - BRAZIL |
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Tipo: | TEXT | Subtipo: | THESIS | |||||
Notas: |
[pt] Todos os dados constantes dos documentos são de inteira responsabilidade de seus autores. Os dados utilizados nas descrições dos documentos estão em conformidade com os sistemas da administração da PUC-Rio. [en] All data contained in the documents are the sole responsibility of the authors. The data used in the descriptions of the documents are in conformity with the systems of the administration of PUC-Rio. |
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Referência(s): |
[pt] https://www.maxwell.vrac.puc-rio.br/projetosEspeciais/ETDs/consultas/conteudo.php?strSecao=resultado&nrSeq=5854&idi=1 [en] https://www.maxwell.vrac.puc-rio.br/projetosEspeciais/ETDs/consultas/conteudo.php?strSecao=resultado&nrSeq=5854&idi=2 |
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DOI: | https://doi.org/10.17771/PUCRio.acad.5854 | |||||||
Resumo: | ||||||||
This study assessed total selenium concentrations (TSe) in
the muscle tissues, liver and gonads samples of three fish
species (Mugil liza - mullet, planktivorous fish; Bagre
spp. - catfish, omnivorous fish and Micropogonias furnieri -
Atlantic croaker, carnivorous fish) and also in the soft
tissues of a mussel (Perna perna) from Guanabara Bay. TSe
in the digested samples was analyzed by GF-AAS using Zeeman
background correction. Pd was the chemical modifier. The
analytical methodology presented high precision and accuracy
when tested with certified reference materials, DORM-2 and
NIST 2976, and also through intercomparison between two
laboratories, Laboratório de Radioisótopos (UFRJ) and a
reference laboratory from a Finish National Public Health
Institute, using fish samples. The liver samples of all
studied fish species presented the highest TSe. Carnivorous
and planktivorous fishes presented similar TSe in their
liver. Carnivorous fish showed the highest TSe in the
muscle. The muscle was the only tissue that presented a
direct influence of the feeding habits. Carnivorous and
planktivorous fishes showed high positive correlations
between TSe in the muscle and their total length, age and
consequently, with the exposure time at environment. A
significant correlation was observed between the selenium
concentration in the mussel soft tissues and the condition
index (IC). We verified in the scientific literature that
our study was the second one conducted in Brazil.
Furthermore it was the first one that compared the total
selenium concentrations in organs and tissues of several
aquatic organisms with different feeding habits.
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