大鳍鳠的消化能力与营养价值  

Digestive ability and nutritive value of Mystus macropterus

作　　者：向枭[1] 叶元土[2] 周兴华[1] 林仕梅[1] 罗莉[1] 王友慧[1] 

机构地区：[1]西南农业大学水产学院,重庆荣昌402460 [2]苏州大学生命科学学院,江苏苏州215006

出　　处：《水产学报》2003年第4期371-376,共6页Journal of Fisheries of China

摘　　要：采用常规方法测定了大鳍鳠(Mystusmacropterus)的消化道指数,其比肠长、比胃重、比肠重、比肝胰脏重和比内脏重分别为0.531±0.006、0.014±0.006、0.017±0.003、0.0084±0.0029和0.070±0.011。体重与体长的回归方程Y=0.1238X2.8388(r=0.9949,P<0.01);大鳍鳠的胃、前肠、中肠和后肠中消化液的pH值分别为:3.0～3.8、6.6～7.4、7.2～8.2、7.2～7.9,且消化道各部分具有较高的蛋白酶和淀粉酶活性,蛋白酶的活性为中肠>前肠>肝胰脏>后肠>胃;而淀粉酶的活性则为前肠>后肠>中肠>肝胰脏>胃;全鱼和肌肉中粗蛋白的含量分别为62.09±3.8%和68.28±4.6,粗脂肪含量分别为15.33±1.7和21.87±2.9;肌肉中必需氨基酸的含量占氨基酸总量的40.76%,鲜味氨基酸的含量为总氨基酸量的29.70%。综合肌肉的常规营养成分和氨基酸分析的结果,表明大鳍鳠是一种营养价值较高的优质鱼类。With normal regulations method,the digestive tube indices of Mystus macropterus such as ratio of intestine gut length to body length was 0.531±0.006 while the ratio of stomach,intestine gut, hepatopanceras or viscera weight to body weight were 0.014±0.006,0.017±0.003,0.0084±0.0029 and 0.070±0.011,respectively.The regression of body weight with body length was Y=0.1238X^(2.8388)(r=0.9949,P<0.01).The pH value of stomach,anterior intestine,middle instestine,posterior intestine and hepatopancreas were 3.0-3.8,6.6-7.4,7.2-8.2 and 7.2-7.9,respectively.At the same time,the activities of protease were middle instestine>anterior intestine>hepatopancreas>posterior intestine>stomach;the activities of amylase were anterior intestine> posterior intestine>middle instestine> hepatopancreas> stomach.The crude protein of muscle and whole body were 62.09±3.8% and 68.28±4.6,repectively;the crude fat were 15.33±1.7 and 21.87±2.9, repectively.The essential amino acids accounted for 40.76% of total amino acids and the delicious amino acid accounted for 29.70% of total amino acids. It was indicated that the nutritive value of Mystus macropterus is higher than that of the common carp and grass carp.

关 键 词：大鳍鱯 消化能力 营养价值 消化道指数 比肠长 比胃重 比肠重 比肝胰脏重 比内脏重 

分 类 号：S965.1[农业科学—水产养殖]