Efeito da quantidade de proteína na dieta e treinamento físico sobre parâmetros fisiológicos e zootécnicos de matrinchã (Brycon amazonicus, Günther 1869) / Dietary protein and exercise training effects on the physiological and zootechnical parameters of matrinchã (Brycon amazonicus, Günther 1869)

The aim of this study was to evaluate the combined effects of physical training and the dietary protein level on the hematological parameters, body proteins, lipids and ash content, food intake, conversion efficiency and growth ratio together with the swimming performance and the resistance to hypoxic stress in specimens of matrinchã. The results indicate that the swimming performance and hematology are not altered by physical training or by the diet protein content; moreover, the resistance to hypoxia is increased by the exercise, as indicated by the lower levels of plasma glucose. Increased amount of protein in the diet and training improve feed conversion and mass gain in the animals, while enhanced food intake is related to training. The simultaneous application of those two factors causes a combined and improved effect on the mass gain and the conversion rates. Due to higher fat accumulation in the fillet, future assessment of stored fat type is suggested, as well as evaluation of market acceptance of the fish product.

O objetivo do presente estudo foi avaliar a interação entre os efeitos do treinamento físico e da quantidade de proteína na dieta sobre a hematologia; a composição corpórea de proteínas, lipídeos e cinzas; o consumo alimentar, o ganho de massa e fator de conversão; o desempenho natatório e a resistência ao estresse causado pela hipóxia em exemplares de matrinchã. Os resultados indicam que a hematologia e o desempenho natatório não são alterados pelo treinamento físico ou pela concentração de proteína na dieta, porém, a resistência à hipóxia é aumentada pelo treinamento, como indicado por menores elevações dos níveis de glicose. O aumento da quantidade de proteína na dieta e o treinamento melhoram a conversão alimentar e o ganho de massa dos animais, enquanto que o aumento na ingestão de ração é causado apenas pelo treinamento. A aplicação concomitante dos dois fatores, embora cause efeito aditivo nos índices de ganho de massa e conversão alimentar, gera também os maiores acúmulos de gorduras no filé, o que sugere uma avaliação do tipo de gordura acumulada e da aceitação desta carne no mercado.

EXPERIMENTAL STUDIES ON THE RESISTANCE TO HYPO-XIA OF TOTAL GLUCOSIDES OF PAEONY ROOT / 中国药理学通报

Total Glucosides of Paeony Root ( TGPs, 5-40 mg/kg) had a dose-related increasing effect on the survival time of mice under normobaric hypoxia. TGPs (20 mg/kg) had a significant increasing effect on survival time of mice under hypobaric hypoxia & a decreasing effect in the oxygen consumption in mice. TGPs ( 40mg/kg ) decreased the mortality of mice from the acute hypoxia induced by KCN. Increasing effect on the survival time of mice under normobaric hypoxia of TGPs was significantly antagonised by chlortrimeton. The efficacy of TGPs (icv 2.5-5 mg/kg) approximated to that of TGPs (ip 5-40 mg/kg) respectively. It suggested that the effect of TGPs on resistance to hypoxia was produced by central nervous system. The efficacy of TGPs ( icv) was significantly antagonised by chlortrimeton. It was shown that the effect of TGPs was produced by H1-receptor. In the experiment of resistance to hypoxia of TGPs (ip or icv), we measured the change of rectal temperature of mice. The data indicated the positive corr- elation of both effects of TGPs (r=0.58, P