盐度对点篮子鱼消化酶活性的影响

以自然海水组(盐度30～32)为对照,研究了20、10、5三种盐度对点篮子鱼(平均体重86.09 4-17.99g,平均全长13.90±1.53 cm)幽门盲囊、肠、胃和肝脏中蛋白酶、淀粉酶和脂肪酶活力的影响.结果表明:第24天盐度20的点篮子鱼幽门盲囊蛋白酶活力显著低于对照组(P<0.05);第24天和第48天,在同...

Effects of salinity on digestive enzyme activity in Siganus guttatus

Effects of salinity on digestive enzyme activity in Siganus guttatus,body weight 86.09±17.99 g,total length 13.90±1.53 cm,were investigated.With seawater of salinity 30-32 as control group,we measured and compared activity of three kinds of digestive enzymes,protease,amylase and lipase in four digestive organs,pyloric caecum,ileum,stomach and liver of S.guttatus cultured at salinities 5,10 and 20 for 48 days respectively.Results showed that on the 24th day the pyloric caeca protease activity of salinity 20 group was lower than that of seawater(P<0.05).On the 24th and 48th day,at the same salinity,the protease and amylase activity in descending order were as follows: pyloric caeca,intestine,stomach and liver;on the 48th day,the protease,amylase and lipase enzyme activity of salinity 20 group had no significant difference with those of the control group(P>0.05);on the 24th and 48th day,at salinity 5,10,20 and seawater,the descending order of lipase activity were as follows: intestine,stomach,liver and pyloric caecum.The protease,amylase and lipase activity of salinity 10 and 5 group were lower than those of salinity 20 and control group,and had significant difference(P<0.05),which indicated that low salinity inhibited digestive enzyme activity of S.guttatus.