Allozyme data was used to assess the genetic diversity Astyanax altiparanae populations from the floodplain of the Upper Paraná River (PR). Specimens were collected in the southern Brazilian state of Paraná from PR in Porto Rico municipality and Ribeirão Ficha (RF) in Ubiratã municipality. The authors used 15% (w/v) corn starch gel electrophoresis to identify 21 putative loci for 13 enzymatic systems: Aspartate aminotransferase, 2.6.1.1 (AAT), Acid phosphatase, 3.1.3.2 (ACP), Esterase, 3.1.1.1 (EST), Glycerol-3-phosphate dehydrogenase, 1.1.1.8 (G3PDH), Glucose-6-phosphate dehydrogenase, 1.1.1.49 (G6PDH), Glucose-6-phosphate isomerase, 5.3.1.9 (GPI), Iditol dehydrogenase, 1.1.1.14 (IDDH), Isocitrate dehydrogenase -NADP + , 1.1.1.42 (IDH), L-Lactate dehydrogenase, 1.1.1.27 (LDH), Malate dehydrogenase, 1.1.1.37 (MDH), Malate dehydrogenase -NADP + , 1.1.1.40 (MDHP), Phosphoglucomutase, 5.4.2.2 (PGM), and Superoxide dismutase, 1.15.1.1 (SOD). The proportion of polymorphic loci were estimated as 52.38% in the PR population and 38.10% in the RF population. Expected estimated heterozygosities were 0.1518 ± 0.0493 for the PR population and 0.0905 ± 0.0464 for the RF population. The A. altiparanae heterozygosity data were similar to previous estimates for other PR basin characid species. Allele frequencies were significantly different between the PR and RF populations in respect to some loci (Acp-1, G3pdh-1, Gpi-A, Iddh-1, Mdhp-1 and Mdhp-2). Wright's statistics for all loci were estimated as F is = 0.3919, F it = 0.4804 and F st = 0.1455. Our results show that the A. altiparanae populations studied are genetically different and have a high degree of genetic variability.

RESUMO.Neste trabalho investigamos a influência da Gymnema sylvestre (Gs) na elevação da lipidemia após administração de gordura de origem animal em ratos machos Wistar (230g-250g). Os animais, em jejum por 22 horas, foram divididos em 5 grupos que receberam via intragástrica às 8h os seguintes tratamentos: 1) 2mL de gordura suína Batavo ® /kg de peso corpóreo (GSB); 2) GSB + 500mg/kg de peso corpóreo de Gs (Gs 500mg); 3) GSB + 1g/kg de peso corpóreo de Gs (Gs 1g); 4) Gs 500mg; 5) Gs 1g. Os animais foram sacrificados 30min após a administração destas substâncias. Não observamos diferenças significativas na concentração sérica de lipídeos totais, triglicerídeos e colesterol total nos ratos que receberam GSB na ausência ou presença de Gs 500mg ou Gs 1g. Portanto, nossos resultados sugerem que a Gs não afeta a absorção intestinal de lipídeos.Palavras-chave: Gymnema sylvestre, absorção de lipídeos, ratos Wistar.ABSTRACT. The influence of Gymnema sylvestre on the elevation of blood levels of lipids after administration of animal fat in male wistar rats. The aim of the present experiment was to investigate the influence of Gymnema sylvestre (Gs) on the elevation of blood levels of lipids after administration of animal fat in male Wistar rats (230-250g). The animals, which were fasted for 22h, were separated in five groups that received (8:00 a.m) intragastric administration of: 1) 2ml of pork fat Batavo ® /kg of body weight (PFB); 2) PFB+500mg/kg of Gs body weight (Gs 500mg); 3) PFB + 1g/kg of Gs body weight (Gs 1 g); 4) Gs 500mg; 5) Gs 1g. The animals were sacrificed 30min after the administration of these substances. No significant differences were verified in the serum concentration of total lipids, triglycerides and cholesterol in the animals, which received PBF in the presence or absence of Gs 500mg or Gs 1g. Therefore, the results showed that Gs could not affect the intestinal absorption of lipids.