[Gastric evacuation rate of black sea bream(Sparus macrocephalus)]

The gastric evacuation rate of black sea bream(Sparus macrocephalus) weighing 20-40 g was determined at 18 degrees C in laboratory. Three mathematical models were applied to simulate it. The result indicated that all of these three kinds of models fitted to the experiment data, while statistical analysis showed that the linear model was the best, whether the remained food in stomach was expressed by wet weight or dry weight. When the remained food in stomach was expressed by wet weight, the model was Y = 1.14 - 0.06 t(r2 = 0.82, p < 0.001), and by dry weight, it was Y = 1.36 - 0.07 t(r2 = 0.62, p < 0.001). The gastric evacuation rate of black sea bream was 6-7% of consumed food per hour at 18 degrees C.