Biomonitoring evaluation for some toxic and trace elements in sea urchins species Lytechinus variegatus (Lamarck, 1816) in marine environment: São Paulo Northern Coast (Brazil)
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2017
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60 YEARS OF IEA-R1: INTERNATIONAL WORKSHOP ON UTILIZATION OF RESEARCH REACTORS
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Sea urchins are marine and benthic invertebrates, many of which sessile or with
reduced mobility. The species Lytechinus variegatus (Lamarck, 1816) is geographically
widely distributed, from North Carolina, in the United States, to the South
of Brazil. The present study analysed a mixture of gonads and gut of sea urchins
(20 individuals of each site) from the north coast of São Paulo, Ilhabela, in the São
Sebastião Channel (contaminated region) (23.8145 S 45.3782 W) and Praia Preta
– São Sebastião (control region) (23.7745 S – 45.7132 W) to verify if this species
could be used as biomonitor for the studied region. After collection, the samples
were dried in a ventilated oven at 40 C until constant weight. After drying, the
samples were crushed and sieved in 60 mesh (0.250 mm) granulometry. The micronutrients
concentration (Ca, Fe, K, Na, Se e Zn) and trace elements (As, Ba,
Br, Co, Cr, Rb, Sb e Sc) were determined by Instrumental Neutron Activation Analysis
(INAA). Methodology validation was carried out by means of certified reference
materials analyses such as: Oyster Tissue (NIST – 1566b), Mussel Tissue (NIST
SRM – 2976), Peach Leaves (NIST SRM – 1547) and were validated by Z-Score, |Z|
< 3 in 95% confidence interval (C.I.) For preliminary statistical analysis, a normality
test (p > 0.05) and Grubbs test were performed for outlier detection (p < 0.05, C.I.
95%) . The preliminary results showed that the elements Cs, Cr, Sc and presented a
higher concentration in the contaminated point and the elements As, Br, Co, Fe and
Se, in the control point (C.I. 95%, test-t for independent samples). These are the
preliminary results and Multivariate Statistical Analysis will be applied to the results.
Como referenciar
ALVES, M.B.; EMERENCIANO, A.K.; BORDON, I.C.A.C.; SILVA, J.R.M.C.; FAVARO, D.I.T. Biomonitoring evaluation for some toxic and trace elements in sea urchins species Lytechinus variegatus (Lamarck, 1816) in marine environment: São Paulo Northern Coast (Brazil). In: 60 YEARS OF IEA-R1: INTERNATIONAL WORKSHOP ON UTILIZATION OF RESEARCH REACTORS, November 28 - December 01, 2017, São Paulo, SP. Abstract... São Paulo, SP: Instituto de Pesquisas Energéticas e Nucleares, 2017. p. 41-41. Disponível em: http://repositorio.ipen.br/handle/123456789/28738. Acesso em: 30 Dec 2025.
Esta referência é gerada automaticamente de acordo com as normas do estilo IPEN/SP (ABNT NBR 6023) e recomenda-se uma verificação final e ajustes caso necessário.