Effect of Fasting on Resting Metabolic Rate, Body Composition and Excess Post-Exercise Oxygen Consumption in Juvenile Chinese Catfish (Silurus Asotus Linnaeus);

58%) decline in resting metabolic rate(RMR) of the experimental fish during starvation,which decreased from 63.

The resting metabolic rate was correlated significantly with body weight but not significantly with gonadosomatic inde.

From Autumn, 2002 to October, 2002, the resting metabolic rates of Pelteobagrus vachelli, which weighted 83 g, were measured by Continueflowing respirometers.

The keys to studying urban sustainable development are material metabolic flux and metabolic efficiency, but urban material metabolic flux can reflect the metabolic rate, and its eco-efficiency can determine the metabolic capacity to support socio-economic development.

Based on energy analysis,an index framework of urban material metabolism including metabolic flux,metabolic stock and metabolic efficiency was proposed,by which the urban material metabolism level of four municipalities in China including Beijing,Tianjin,Shanghai and Chongqing in 2005 were investigated and analyzed.

Phosphorus(P) input and output of four sub-systems(planting,animal husbandry,population and a simple sub-system representing all other inputs and outputs),the metabolic efficiency of the whole system,and the factors affecting pollution load are discussed.