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Variação sazonal do perfil lipídico da corvina produzida em aquacultura
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Orientador(es)
Resumo(s)
Meagre, Argyrosomus regius, has shown good nutritional and adaptative features. As a result, its prodution in aquaculture system has been increasing.
The key objective of this thesis is to study the seasonal variation (from January to July) in lipid content of different organs from meagre (gonads, liver and muscle), as well as muscle nutritional information.
In this study, we analysed the total of lipids, lipids class and fatty acids profile in different organs. Our results revealed that the most determinant factor in fatty acid composition is the type of organ, rather than the month of capture. Overall, our results showed that (i) the liver is the organ with the highest levels of total lipids (LT) (47 – 59 % LT); (ii) the gonads are the organ with the highest level of omega-3 fatty acids, mainly Eicosapentaenoic acid (EPA) (3-5 % total fatty acid) and omega-6, in particular Arachidonic Acid (AA) (2-7 % total fatty acid); (iii) the muscle is rich in Docosahexaenoic acid (DHA) and in Linoleic Acid (LA) (12-14 % and 5-12 % totals fatty acids, respectively), showing a good correlation with the diet.
Finally, this study also revealed that meagre is a lean fish and a good source of protein, with levels close to 33,6±0,96 and 33,1±0,6 g protein/160 g meagre in January and June, respectively. The muscle fatty acid composition showed that meagre fleh is rich in EPA+DHA. In a regular meal (160 g of meagre) the consumer can obtain levels of EPA+DHA (562,2 mg/ 160 g of meagre in January and 655,8 mg/160g of meagre % in June) higher than the recommended by ISSFAL (500 mg/ day), for the first prevention of CVD
Descrição
Mestrado em Engenharia Alimentar - Instituto Superior de Agronomia
Palavras-chave
farmed meagre Argyrosomus regius organs seasonal variation lipid profile EPA+DHA
Contexto Educativo
Citação
Freire, M.S. - Variação sazonal do perfil lipídico da corvina produzida em aquacultura. Lisboa: ISA, 2015, 86 p.