黄鳍鲷主要消化酶活性在消化道不同部位的比较研究

研究了黄鳍鲷（Sparus latus Houttuyn）主要消化酶（蛋白酶、淀粉酶、脂肪酶）在消化道不同部位（肝胰脏、胃、前肠、中肠、后肠）的分布情况。结果表明，蛋白酶、淀粉酶、脂肪酶比活最高的部位分别是胃、肝胰脏和前肠，酶活性明显高于其他部分（P〈0．01）。从肠道消化酶的比活大小来看，蛋白酶比活是前肠、中肠、后肠依次降低，淀粉酶比活是中肠〉前肠〉后肠，脂肪酶比活是前肠〉后肠〉中肠。

Comparative studies on the digestive enzymes activity in different parts of the alimentary canal in Yellowfin black porgy Sparus latus Houttuyn

The digestive enzymes (Protease,amylase,and lipase)activities of 5 alimentary organs (Hepatopancreas,stomach,foregut,midgut and hingut)in Yellowfin black porgy Sparus latus Houttuyn which weighs 300~400 g were measured.The order of protease activity was as follows:stomach>foregut>midgut>hepatopancreas>hingut.The protease activity in stomach is much higher than those in other alimentary organs(P<0.01),the difference of protease activity between hepatopancreas and hingut was not significant(P>0.05).The order of amylase activity was as follows:hepatopancreas>stomach>midgut>foregut>hingut.The amylase activities in the five alimentary organs were relatively high.The order of lipase activity was as follows:foregu>hingut>stomach>hepatopancreas>midgut.The lipase activity in hingut was very low comparatively.The results showed that the stomach,hepatopancreas,and foregut were the main alimentary organs which digest protein,amylum,fat respectively.