Ninty three yellowfin tuna, Thunnus albacares, the fork length ranged from 80 to 168 cm were collected from the waters around Seychelles by two longline fishing vessels from April to December in 2006. The muscle and liver samples were analyzed for total mercury (THg) and organic mercury (OHg) concentrations.The concentrations of THg and OHg of the muscle were similar to previous studies. The concentrations of THg and OHg form the muscles and livers were positive-linearly regressed with the fish of Fork Length larger than 113 cm (big fish group), but only THg concentration of muscle was negative- linearly regressed 80- 112 cm (small fish group). Such patterns were first found in yellowfin tuna. It might be related to the ¡§growth rate¡¨ . Only one THg concentration of liver were over the standard set by the European Commission Decision (1 mg / kg THg wet wt.), other samples were in accordance with standard set by the European Commission Decision and the US-FDA food safty standard (1 mg / kg MeHg wet wt.). According to the dietary recommendations set by the Department of Health, Executive Yuan, yellowfin tuna can replace 86% animal protein source per week of people.

Made available in DSpace on 2016-04-26T20:48:38Z (GMT). No. of bitstreams: 1 Euzebio Jorge Silveira de Sousa.pdf: 5605701 bytes, checksum: d49a9afa71b2e4ad6d4076512161019c (MD5) Previous issue date: 2013-06-11 / Technological change is a key variable in the inherent accumulation process of the capitalism system. Every major transformation leads to qualitative and quantitative changes in the way the labor force is inserted on the production process. Even before the first industrial revolution there is controversy whether or not technological advancement creates structural unemployment, this debate pervaded by classical economics, still present today among structuralists and neo-Schumpeterian economists. In this paper, we analyzed the three major technological transformations of capitalism system, and if such changes are responsible for substantial changes on the employment levels. We identified that unemployment arising from technological progress assumes a cyclical character, but also follows non-economic variables. There were found different institutional arrangements and unemployment levels for similar technological standards, thus suggesting that the high level of unemployment, with low growth and productivity - seen in the post-Fordism - can be caused by factors that transcend the new technologies. By analyzing the new economic environment in Brazil, it was found that the traditional sectors generate more jobs and growth to the country, but are unable to sustain this growth in the medium and long term due to low productivity and competitive advantage. The most dynamic and technological sectors tend to generate more indirect jobs and by the income effect, diverges its technological advances to other sectors of the economy, allowing more investments and job generation / A mudança tecnológica é uma variável chave no processo de acumulação capitalista. A cada grande transformação das forças produtivas ocorrem mudanças qualitativas e quantitativas da inserção do homem na produção. Desde antes da primeira revolução industrial existe a polêmica se o avanço tecnológico cria ou não desemprego estrutural, este debate perpassou pela economia clássica, estando presente até os dias de hoje, sobretudo nos pensamentos estruturalista e neoschumpeteriano. Neste trabalho, analisamos as três grandes transformações tecnológicas do capitalismo, para verificar se tais mudanças são responsáveis por substanciais modificações nos níveis de desemprego. Verificamos que o desemprego proveniente do progresso tecnológico assume um caráter cíclico, mas também obedece a variáveis não econômicas. Foram detectados diferentes arranjos institucionais e níveis de desemprego no mesmo padrão tecnológico, sugerindo assim que o elevado nível de desemprego, com baixo crescimento e produtividade - verificado no pós-fordismo - pode ser causado por fatores que transcendem às novas tecnologias. Ao analisar a economia brasileira na nova economia verificou-se que os setores tradicionais geram mais empregos e crescimento no Brasil, mas que não são capazes de sustentar esta expansão no médio e longo prazo por possuírem baixa produtividade e vantagens competitivas. Os setores de maior dinamismo e conteúdo tecnológico tendem a gerar mais empregos indiretos e por efeito renda, irradia seus avanços tecnológicos em outros setores da economia, possibilitando mais investimentos e geração de empregos