Study on the element concentration on seabirds feathers by instrumental neutron activation analysis
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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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Resumo
Physical, chemical and biological variations are intrinsic characteristics of the
ecosystems, so their conservation and management depend essentially on the correct
interpretation of such modifications and their effects on the fauna and flora.
Considering the global scene of economic development, these studies are becoming
increasingly necessary. Nowadays seabirds are one of the most threatened vertebrate
groups due to the impact on the ocean caused by human actions. They are
sensitive to changes in the environment and this is one of the main reasons they
are commonly used to monitor ocean pollution. Procellariiformes is a seabird order,
composed of 4 families, and in the last decades several countries with important
breeding and feeding areas have shown interest in the conservation of these birds
and have invested in research and actions that reduce the mortality of albatrosses
and petrels caused by human actions. One of these initiatives was the creation of
the Agreement on the Conservation of Albatrosses and Petrels (ACAP), which Brazil
has been a signatory since 2001. ACAP is an international agreement that includes
countries that are legally obliged to take long-term actions to ensure the conservation
of various species of albatrosses and petrels. Thus, Brazilian researchers, with
government support, have developed a National Plan for the Conservation of Albatrosses
and Petrels (Planacap), which aims to characterize threats to this group
of birds and prioritize actions for these species conservation. Among the actions
suggested for conservation are the continuous monitoring of populations, permanent
research in the main reproductive colonies and the study of dispersion and migration
of the species. Due to the great importance of these birds and the developed
work with Procellariiformes, this study purpose quantify the Br, Cl, Cu, K, Mg, Mn,
Na and V elements in White-chinned Petrel (Procellaria aequinoctialis) and Blackbrowed
Albatross (Thalassarche melanophris) feathers. Bird specimens were killed
accidentally by pelagic longline fisheries operating off southern Brazil. From these
birds, different tissues were collected, among them, the feathers used in this study.
Feathers were cleaned with acetone and then milled in a cryogenic mill. Instrumental
Neutron Activation Analysis (INAA) was used for quantification of the element
concentrations and measurements of induced activities were performed in a HPGe
detector for gamma ray spectrometry. The results obtained from the analyzes of the
White-chinned Petrel and Black-browed Albatross feathers were compared to the
concentrations found in other seabirds species and between this two species, in order
to collaborate with studies already done for the conservation and monitoring of this
seabirds group.
Como referenciar
THEOPHILO, C.Y.S.; FIGUEIRA, R.C.L.; COLABUONO, F.I.; MOREIRA, E.G. Study on the element concentration on seabirds feathers by instrumental neutron activation analysis. 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. 22-22. Disponível em: http://repositorio.ipen.br/handle/123456789/28715. 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.