INALI   02622
INSTITUTO NACIONAL DE LIMNOLOGIA
Unidad Ejecutora - UE
congresos y reuniones científicas
Título:
Nutritional service of the middle Paraná River, South America
Autor/es:
COLLINS P.A.; D'ALESSANDRO M.E.
Lugar:
Turin
Reunión:
Congreso; 33rd SIL Congress; 2016
Resumen:
The natural environments provide to society different elements or services with economic values. Some of them are recognized by the society, and others are ignored such as the nutritional value. This is underestimated in the freshwater environments, even more, your variation in the year. The different species that are fisheries, or potentially can be captured offer nutritional components (micronutrients and macronutrients) essentials for life or improve the health. Among them, proteins of high biological value and fatty acids (essentials, polyunsaturated n-3, monounsaturated, among others) are elements to evaluate. The aim of work was to identify the services that the freshwater environment provides to the society in relationship to nutrition and health. The evaluation was realized in the fishes of economic interest in the Paraná River (Prochilodus lineatus, Leporinus obtusidens, Pimelodus maculatus, P. albicans, Luciopimelodus pati, Pseudoplatystoma coruscans, Pterodoras granulosus), and prawn species not commercialized (Macrobrachium borellii and M. jelskii). The fish catch volume was obtained from Official Register in fiscalization ports at Middle Paraná River, and data of crustacean decapods from bibliography. The protein and fatty acids (FA) contents of each species were obtained from the bibliography, and with these data were calculated the protein/lipid ratio, n-6/n-3 fatty acids relationship and sum of essentials FA (18:2 n-6, 18:3 n-3) and polyunsaturated fatty acids n-3 (PUFA n-3: 20:5 n-3, 22:6 n-3). In addition, a lipid index was calculated as a function among monounsaturated FA (18:1 n-9), essentials FA, PUFA n-3, 20:4 n-6 and saturated FA. Protein content and some FA levels were relativized according to the monthly catch of each species. The relation protein/lipid was highest in prawns, and among the fishes, was higher for P. granulosus and lowest for L. pati. However, the highest protein content provided by the Middle Paraná River was supplied by P. lineatus due to the more catch. The relation n6/n3 was higher to 1 and lower to 2 in P. maculatus, P. albicans and P. coruscans. The values in the rest of the species were lower to 1. The lipid index was near to 2 for prawns, P. maculatus and L. obtusidens while in the rest of species was lower. The Middle Paraná River provides protein and fatty acids (e.g. essentials and PUFA n-3) that oscillate with maximums along to the year due to the catch (summer, winter and spring), being highest in P. lineatus. The rest of species, maximum values were registered in autumn and winter but their capture volumes were smaller to P. lineatus. The variation of nutritional services of the Paraná River occurred in relation to quantity and quality of protein and lipid in each species and catch variation in the year. The results show resources of good quality nutritional. In the region exists others resource that not are used, e.g. prawns, thus today the value of the nutritional service is subestimated.